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Thread: Sony 24-70 F2.8 GM Tests

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    Sony 24-70 F2.8 GM Tests

    Just recieved the 24-70 mm GM lens this morning about 10 am and normally i do my Big Bronco wall test but today given the time too many cars so I went down the street and shot all these handheld. I went looking for Bokeh, Bokeh Balls, Onion rings and I got everything I was after. I did some interesting tests that Im not sure anyone has done before but hopefully you will see things very clearly especially bokeh on what this Zoom can do. Looking at these you may forget its a zoom because this laddie never seen a mid zone zoom be this nice at bokeh. On to images and i am going to be skipping around so pay attention

    Interesting test I shot every focal length and every aperture to see what effect each focal length looks like at a given aperture. Now I kept moving away from subject doing this and i did it handheld. Not working about sharpness so much that will come later but I did use AF right smack on the nose at each focal length. Watch the Bokeh that is what this test is.




































    Now staying with the Bokeh look i tried another test all images at 2.8 but all different focal lengths. Yea we went from the Horse to the Cow and by the time we are all done I will have the whole McDonalds Farm animals. LOL













    I do NOT see at all focal lengths wide open any bad focal lengths at this point. They all look very crisp in this daylight
    Last edited by Guy Mancuso; 4th April 2016 at 18:59.
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    Re: Sony 24-70 F2.8 GM Tests

    Moving on to Bokeh Balls and Onion Rings. Im pretty sure this is a 9 blade aperture ring and the new GM 85 1.4 is 11. So obviously the 85 will produce a nicer look but this does a nice job in my mind, its not perfect but the Bokeh balls are round but I did get some onion rings. Now there is a special element in this lens to reduce that and honestly I think it does for the most part. The onion rings came in on very bright reflections. Lets take a look at this and maybe folks can offer some opinions. I keep reminding myself this is a zoom and not known for great Bokeh Balls and absent onion rings













    I am going to add a comment here . I shot every 35mm lens i have bought and tested right here this is the best I have seen. Tamron 35mm 1.8, Sigma 35mm 1.4, Sigma 24-35 F2, Sony 35 mm 1.4, VC 35mm 1.7 and the Loxia 35mm. Wow that is a lot of glass I bought. Anyway










    So good and some bad but I kind of expected this given as you see how many stinking 35mm lens I have gone through
    Last edited by Guy Mancuso; 4th April 2016 at 19:34.
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    Re: Sony 24-70 F2.8 GM Tests

    Some extra images playing around.














    Photography is all about experimentation and without it you will never learn art.

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    Re: Sony 24-70 F2.8 GM Tests

    Mine arrived this afternoon.
    If weather cooperates I'll do some testing tomorrow.

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    Re: Sony 24-70 F2.8 GM Tests

    Look forward to it David . Please post here if you want , goes for everyone.
    Photography is all about experimentation and without it you will never learn art.

    www.guymancusophotography.com

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    Re: Sony 24-70 F2.8 GM Tests

    Looking very nice. I can hardly wait for mine to show up.

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    Re: Sony 24-70 F2.8 GM Tests

    This was tough but I think I got what i was after. Its a 100 percent crop of my grandson eating pasta. Yea he has some Italian in him. LOL

    f 2.8 than F4



    Photography is all about experimentation and without it you will never learn art.

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    Re: Sony 24-70 F2.8 GM Tests

    Im still not sure I got the 2.8 one but it was fun trying
    Photography is all about experimentation and without it you will never learn art.

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    Re: Sony 24-70 F2.8 GM Tests

    Waiting for mine.

    Thanks Guy, it sure looks very good. Not too worried about onion rings in a zoom like this.
    Too much to list, let's just say I have a bad case of GAS.........

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    Re: Sony 24-70 F2.8 GM Tests

    Guy, The Onion rings do show the Sony hype (good that they seem to have made a decent zoom). It does take some shine off of the GM lens for me.

    Thanks for showing them!

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    Re: Sony 24-70 F2.8 GM Tests

    I think with that special element it does reduce it mostly but obviously here on the zoom at least they do pop up. Seems mostly the very brightest reflections with this 9 blade lens. I think the GM 85 will be better at it since it has 11 blades. We will soon find out, hope to have that lens by end of week. I will certainly test for it. But yes it does have one issue. But I have had many issues with every 35 lens too. It's aspherical glass that causes it. If it's a big issue to some than maybe some older designs could be better at it.

    One thing for sure it is the best native mount zoom to date, I have no doubts about that.
    Photography is all about experimentation and without it you will never learn art.

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    Re: Sony 24-70 F2.8 GM Tests

    Quote Originally Posted by Guy Mancuso View Post
    But yes it does have one issue. But I have had many issues with every 35 lens too. It's aspherical glass that causes it. If it's a big issue to some than maybe some older designs could be better at it.
    I know it's a personal preference thing, but I certainly wouldn't call those onion rings an 'issue'. To me, they are not objectionable in the least, especially since they are nice and round (no cat-eye thing).

    Some of us remember shooting with mirror lenses. ;-)

    Sony 500mm Reflex

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    Re: Sony 24-70 F2.8 GM Tests

    What a terrible thread.....
    the HepKitty
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    Re: Sony 24-70 F2.8 GM Tests

    Quote Originally Posted by Guy Mancuso View Post
    I think with that special element it does reduce it mostly but obviously here on the zoom at least they do pop up. Seems mostly the very brightest reflections with this 9 blade lens. I think the GM 85 will be better at it since it has 11 blades. We will soon find out, hope to have that lens by end of week. I will certainly test for it. But yes it does have one issue. But I have had many issues with every 35 lens too. It's aspherical glass that causes it. If it's a big issue to some than maybe some older designs could be better at it.

    One thing for sure it is the best native mount zoom to date, I have no doubts about that.
    Thanks for all your hard work testing, Guy. I don't understand why the number of diaphragm blades would affect out of focus background (broken), when the lens is used wide open, and all edges of the blades are out of sight. Stopped down a half stop or more, I could understand it, as the light travels through an opening that is not perfectly circular.
    Best regards, and thanks again.
    Dave in NJ

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    Re: Sony 24-70 F2.8 GM Tests

    Quote Originally Posted by gurtch View Post
    Thanks for all your hard work testing, Guy. I don't understand why the number of diaphragm blades would affect out of focus background (broken), when the lens is used wide open, and all edges of the blades are out of sight. Stopped down a half stop or more, I could understand it, as the light travels through an opening that is not perfectly circular.
    Best regards, and thanks again.
    Dave in NJ
    Damn auto correct on my iPad.....I wrote "bokeh", and it came out "broken"

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    Re: Sony 24-70 F2.8 GM Tests

    Quote Originally Posted by gurtch View Post
    Damn auto correct on my iPad.....I wrote "bokeh", and it came out "broken"
    ... or sometimes "booked".
    With best regards, K-H.

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    Re: Sony 24-70 F2.8 GM Tests

    From what I am seeing here and at FM and elsewhere this looks to top the heap of 24-70 zooms for any system.

    Sony is on their game with the GM glass. All three lenses are very desirable.

    Zeiss needs to step it up in the zoomy lens arena. Sony is showing them their tail lights.

    -Bill
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    Re: Sony 24-70 F2.8 GM Tests

    Sony farms out production of the lowly consumer grade lenses to Zeiss.
    How glorious a greeting the sun gives the mountains! - John Muir

    davechewphotography.com
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    Re: Sony 24-70 F2.8 GM Tests

    I did some quick shooting to collect images I could use to evaluate some lens characteristics that are important to me.



    HERE is a page on my site where I've placed some collections that I've used to evaluate various characteristics. Each gallery includes a brief description of what I was looking for from the shots.

    Generally, I like the lens. Its big but balances well with the A7RII, even without the battery grip. The focus is fast and silent as others have reported. Even in relatively dark environment it quickly locked focus with the smallest area selected.

    Its getting a bit warmer this afternoon so I think I'll take it for a walk. So, more to come.
    David

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    Re: Sony 24-70 F2.8 GM Tests

    First shot -

    Freezing rain

    At 24mm @ É2.8




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    Re: Sony 24-70 F2.8 GM Tests

    Back from walking the 24-70 F2.8 GM.
    Happily we're cat people so I only had to be concerned with making images.

    When I got back Mac, one of our two siamese, was patiently waiting.



    That really is dandruff on his fur. I like the transition from focus plane to out of focus.

    f5.6, 1/60, ISO100, 70mm
    David

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    Re: Sony 24-70 F2.8 GM Tests

    One thing that's always a challenge is getting well defined clouds in a blue sky.

    This is a version shot at 24mm. There is another one shot at 70mm in the Random Images gallery I linked to in an earlier post.

    F2.8, 1/1600, ISO 100. Manual focus on the horizon line.

    David

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    Re: Sony 24-70 F2.8 GM Tests

    Ran a quick comparison between the 25mm Batis and 24-70mm GM.

    My conclusion - the GM is killer sharp, even wide open. In fact in the center, it's noticeably better than the Batis until you get to É5.6.

    I'm amazed.

    Here's the scene and a couple 100% crops.

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    Re: Sony 24-70 F2.8 GM Tests

    Wow we may have found our thrill. Lol
    Photography is all about experimentation and without it you will never learn art.

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    Re: Sony 24-70 F2.8 GM Tests

    Quote Originally Posted by dmward View Post
    Back from walking the 24-70 F2.8 GM.
    Happily we're cat people so I only had to be concerned with making images.

    When I got back Mac, one of our two siamese, was patiently waiting.



    That really is dandruff on his fur. I like the transition from focus plane to out of focus.

    f5.6, 1/60, ISO100, 70mm

    Yup that's the beauty of this lens. Never would have thought we would see it in a zoom. Mines a keeper
    Photography is all about experimentation and without it you will never learn art.

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    Re: Sony 24-70 F2.8 GM Tests

    The GM zoom at 52mm @ É2.8



    Larger version here
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    Re: Sony 24-70 F2.8 GM Tests

    Mike this is great news. I always thought the Batis 25 was the best lens for the A7R2, but if the zoom can match it, I can then just keep that one. If it is as good as the 55 1.8 too, then the only reason to keep the latter would be for really shallow DOF.

    Interesting times for sure
    Too much to list, let's just say I have a bad case of GAS.........

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    Re: Sony 24-70 F2.8 GM Tests

    There have been several comments on various fora about how the Sony 24-70 GM compares to the Canon Mk II.
    I had the MkII as well as the first Canon version. I also have the Sony F4 so I went back through my Lightroom catalogs for the last few years and collected some sample images and put them into galleries HERE.

    As I was doing the collecting I realized that all 4 of the lenses perform. The Canon MK II I owned was an outstanding lens. My early impression of the Sony GM is that its an outstanding lens as well. My Zony F4 is sitting here on my desk trying to convince me on to put it up for sale. Its delivers nice images, its small but I can't justify keeping it just because its small.

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    Ridiculously sharp

    33mm @ É3.5



    Larger version here
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    Re: Sony 24-70 F2.8 GM Tests

    Quote Originally Posted by dmward View Post
    There have been several comments on various fora about how the Sony 24-70 GM compares to the Canon Mk II.
    I had the MkII as well as the first Canon version. I also have the Sony F4 so I went back through my Lightroom catalogs for the last few years and collected some sample images and put them into galleries HERE.

    As I was doing the collecting I realized that all 4 of the lenses perform. The Canon MK II I owned was an outstanding lens. My early impression of the Sony GM is that its an outstanding lens as well. My Zony F4 is sitting here on my desk trying to convince me on to put it up for sale. Its delivers nice images, its small but I can't justify keeping it just because its small.
    I have the Canon MkII and the Sony f4, the latter is definitely soft, at least my copy is. The Canon is great but I am trying to stick with the Sony for anything less than 100mm. If the new zoom can fit the bill, it would eliminate the need for my Batis 25, my 35 2.8 and my 55 1.8 with a single lens. Usually with zooms the longer end is always softer, hence would still keep my Batis 85.

    I will be getting mine in a few weeks from now as I am traveling. Will see how it works out.
    Too much to list, let's just say I have a bad case of GAS.........

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    Re: Sony 24-70 F2.8 GM Tests

    Loading new test Thursday
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    Re: Sony 24-70 F2.8 GM Tests

    Okay continuing on with my Big Bronco wall test which we all agree is boring as heck but a vital test to check corners and center sharpness on lenses which I do this test on every lens I buy which means in another words< Im constantly doing this test. But thats a another story all together. Here i am just going to work on the Sony 24-70 GM 2.8 alone and than if we want to compare to some other lenses we can do that. But let me be honest right out of the gate. This lens is kicking butt and taking numbers. Im a little bit shocked as the results are very strong for a zoom across all the focal lengths. Sure maybe a few weak areas in focal length but it is not by much and 24mm might be the strongest and will smoke a lot of primes. I know will it beat a Batis 25. LOL Its pretty scary how good 24mm is and it flows uphill with 29mm, 35 and 50. Lets look at the images and see what you all think.

    First lets show the distortion at 24mm which is pretty strong but checking 29mm images there is very very little so I would suggest at 24mm you have your lens profiles on.





    Okay that is the scene and here are the upper left crops . On the 24mm i did put in the right crop as there has been some discussion about upper right softness. Comparing the left and right at 2.8 it looks dead even on this copy at least. Yahoo I have a good copy and let me remind everyone this is pixel peeping to the max. these are 100 percent crops 1200x1200












    I could not be more impressed with the 24mm setting its even good wide open in the corners

    STOP STOP STOP
    I should not say this but Im going to anyway. My opinion take it for what it is worth. I have NOT seen any 24mm lens in this system of lenses pick any one you want but nothing I have seen is this good in the corners at 24mm. I love the Batis 25mm but the corners from memory are not this good starting at 2.8. If that answer the Batis 25mm question so be it and Im not a zoom guy and I love the Batis 25 so this runs polar opposite of my preferences but we also need to consider the center crops which I will post after this. Moving on









    29mm getting really good at 5.6










    35mm is pretty darn strong here . 5.6 looks really good and this is my most frustrating focal length in the primes. Now a lens that will beat this at 2.8 in the corners is the Tamron 35mm SP 1.8 that lens is very flat field and very sharp but with that its also a clinical lens. But also a very nice landscape lens to have when you need like 2.8 to shoot in the wind for speed. Sony FE 35 1.4, VC 35mm 1.7, Sigma 35mm F 1.4 its more like starting to get decent at 5.6 and F8 as the optimum. They have more filed curvature. The Sony 35mm 2.8 I just had a bad copy so my comments would not be valid on it










    This one is tough I love love the Loxia 50mm F2 and the question does this zoom equal or beat it. It actually may beat it here but I think if you need a prime when you don't want to take this along the Loxia 50mm is the number one pick in my mind to have and if your like me and have this huge gap between 21 and 85 primes than either a great 35mm or the Loxia 50mm makes the most sense . Lots of options here on which way you want to look as well do you want the same rendering as the zoom which everyone that has the zoom today is saying the same thing it just renders amazingly well. Tough call here


    At 70mm I had a little tough time focusing as I was pushed back all the way to my car and i was having this magnify issue going off without me touching the lens so be careful here as my center crops will show 2.8 there is a big difference when I hit F4 which I feel I was slightly off given my casual shots even handheld 70mm at 2.8 on center where really sharp. So be careful on this one but it is very minor.










    Now you will notice some CA going on here at the 70mm mark. Looks to go away completely at F8 and given maybe my focus error this could be better at F5.6 so be careful again on this one. For me past 50 Im grabbing the 85 1.4 no question. But thats me.

    Coming up center tests
    Last edited by Guy Mancuso; 7th April 2016 at 05:03.
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    Re: Sony 24-70 F2.8 GM Tests

    Yes the end is near , sorry I know looking at walls is boring as watching paint dry but we need to see what is going on before dropping 2200 on a lens. This is not exactly budget minded. LOL
    And I am a lens whore as we all know that.

    Lets look at the center. I used the wall again but than I did use a side wall i like doing as well. Im going to post side by side and I only did 2.8 and F4 and my feeling is if it takes it to 5.6 on center i really don't want that lens. Always wide or one stop down on center for me.


    Test wall for reference













































    Again I ran into focus issues at 70mm as i have this quirk in my camera that i am going to figure out today but Im clearly out on the red wall. I know this lens does better and I will show a sample of 70mm wide open that is extremely sharp. I feel bad I missed this but hope everyone understands










    Here is a wide open handheld 70mm 2.8 shot so I know its not the lens






    One word IMPRESSIVE
    Photography is all about experimentation and without it you will never learn art.

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    Re: Sony 24-70 F2.8 GM Tests

    I decided to run one more test. I can't sleep knowing I'm picking up the GM 85 in 4 hours and seriously how impressed I have been with the zoom. So given i tested all these lenses fairly recently I decided what would be best to represent them. I decided the corner at 5.6 since that is most likely where one would start with landscape , urban and commercial work. Now on center all these lenses will perform as we have seen those wall tests before and there all good wide open or a stop down. But honestly I spent a lot of money, returns and buying and selling to find my thrill at 35mm. So for me at least this is important

    The Loxia 21mm was shot the same time as the Sigma 24-35 zoom so it has the same framing at the 24mm setting or damn close





    Sony zoom






    sony zoom










    sony zoom








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    Re: Sony 24-70 F2.8 GM Tests

    Here is the rub in all this . 95 percent of the folks looking at your images A could care less about your corners B never even notice them C who the hell posts 100 percent crops of images other than us crazy people.

    So does it matter, To us yes to the world probably not so don't get to hung up on this and spend thousands to get a sharp corner. Maybe better said keep it in perspective to what you are doing. Myself Im more concerned about rendering and look of file than being about to read a sign a mile away in the corners. Back to bed

    Im officially done on this lens. I swear I am.
    Photography is all about experimentation and without it you will never learn art.

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  36. #36
    Administrator, Instructor Guy Mancuso's Avatar
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    Re: Sony 24-70 F2.8 GM Tests

    I need to post more zoom images here. Absolutely the best zoom I EVER shot in 24-70. Bar none
    Photography is all about experimentation and without it you will never learn art.

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    Re: Sony 24-70 F2.8 GM Tests

    Guy, for those of us shooting people or fashion or editorial, I agree the corners aren't as important. Those of us, (like me), who shoot architecture and landscapes in my work, do require lenses that are sharp to the corners. I have quite a few 60" wide prints that have soft edges from inferior 'top brand' lenses before the manufactures woke up a few years ago. Your testing is invaluable to me and I am very grateful you take the time to provide the images for us to evaluate.
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    Subscriber Member tashley's Avatar
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    Re: Sony 24-70 F2.8 GM Tests

    Guy,

    Firstly thanks for all those examples - incredibly useful! But can I ask you a favour for when you next get a chance?

    My copy of the lens seems to have a notable asymmetry at 35mm (right side) and 70mm (left side) and I am pretty sure it would be considered out of tolerance. But Lloyd C is finding in his testing of his copy that he is also getting asymmetry though it looks rather less bad than mine and seems to have a different look and behaviour. I noticed mine before he published his test results but it was interesting to see what he found.

    I have a gallery of shots of a far landscape and a near building at all major focal lengths and apertures
    here (full sized hi quality jpegs exported form Lightroom with lens corrections on) and if you had a moment to look especially the 35mm and 70mm shots at F2.8 thru F5.6 and tell me if you see anything similar on similar scenes, I would be extremely grateful. I want to be dead certain that mine's a genuine lemon before I bother my dealer with a return.

    Thanks!

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    Administrator, Instructor Guy Mancuso's Avatar
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    Re: Sony 24-70 F2.8 GM Tests

    Tim I have no asymmetry issues at all at all focal lengths and first thing I checked having gone through 4 FE 35 1.4 lenses it's really something I have been watching . Honestly after hearing his latest tirade over the 85 as well he is just out fishing again. Both lenses have no issues at all except my 85 has the lens AF motor issue and I'm exchanging that but I have shot numerous tests and images and these are stellar lenses. Not to say a lens can't be out but there are only two folks I know returning the zoom. So sure anything is possible. Maybe exchange yours and try another. You know as well as any one if you have a bad copy. It's a lens worth having so might want to consider a exchange. I'll take the high road on Mr Chambers and not say another word. I have shot these two lenses like nobody's business and I'm not finding any fault in either.
    Photography is all about experimentation and without it you will never learn art.

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  40. #40
    Subscriber Member tashley's Avatar
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    Re: Sony 24-70 F2.8 GM Tests

    Quote Originally Posted by Guy Mancuso View Post
    Tim I have no asymmetry issues at all at all focal lengths and first thing I checked having gone through 4 FE 35 1.4 lenses it's really something I have been watching . Honestly after hearing his latest tirade over the 85 as well he is just out fishing again. Both lenses have no issues at all except my 85 has the lens AF motor issue and I'm exchanging that but I have shot numerous tests and images and these are stellar lenses. Not to say a lens can't be out but there are only two folks I know returning the zoom. So sure anything is possible. Maybe exchange yours and try another. You know as well as any one if you have a bad copy. It's a lens worth having so might want to consider a exchange. I'll take the high road on Mr Chambers and not say another word. I have shot these two lenses like nobody's business and I'm not finding any fault in either.
    Thanks Guy. Sounds like, the fact that you know two (not sure if that includes me or not) people returning their copies and that yours is perfect does make me feel that I just got unlucky. I will return and repeat and see what I get. But if you look at, for example, this file I think you'll probably agree that this is a bad copy of a good lens rather than a representative copy of a lens which has had to make major design compromises....

  41. #41
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    Re: Sony 24-70 F2.8 GM Tests

    Quote Originally Posted by tashley View Post
    Thanks Guy. Sounds like, the fact that you know two (not sure if that includes me or not) people returning their copies and that yours is perfect does make me feel that I just got unlucky. I will return and repeat and see what I get. But if you look at, for example, this file I think you'll probably agree that this is a bad copy of a good lens rather than a representative copy of a lens which has had to make major design compromises....
    Tim, Have you considered changing you dealer since you seem to have string of bad copies from Sony/Zeiss?

  42. #42
    Subscriber Member tashley's Avatar
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    Re: Sony 24-70 F2.8 GM Tests

    Quote Originally Posted by Vivek View Post
    Tim, Have you considered changing you dealer since you seem to have string of bad copies from Sony/Zeiss?
    Trust me it's nothing to do with the dealer - they are extremely reputable and they also never, every question a return. I couldn't wish for a different dealer.

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    Re: Sony 24-70 F2.8 GM Tests

    Quote Originally Posted by tashley View Post
    Trust me it's nothing to do with the dealer - they are extremely reputable and they also never, every question a return. I couldn't wish for a different dealer.
    In that case, if i were you, i would ditch Sony. Life is too short to be fiddling around with multiple samples of a nascent system with too few lenses.

  44. #44
    Subscriber Member tashley's Avatar
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    Re: Sony 24-70 F2.8 GM Tests

    Quote Originally Posted by Vivek View Post
    In that case, if i were you, i would ditch Sony. Life is too short to be fiddling around with multiple samples of a nascent system with too few lenses.
    Ahh but your are not me! I use my Sony stuff more than any other system and when you get the right copy, their lenses are great. As for too few lenses - that's a Vivek windup, right?

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    Re: Sony 24-70 F2.8 GM Tests

    Quote Originally Posted by tashley View Post
    Ahh but your are not me! I use my Sony stuff more than any other system and when you get the right copy, their lenses are great. As for too few lenses - that's a Vivek windup, right?
    If the use pertains to testing, it certainly makes sense, Tim.
    (fwiw, There are even blog articles on how to test a lens with diy instructions)

    You tell me if this system has fewer lenses (not considering the ones involving adapters and specialty manual focus ones) or not.

  46. #46
    Subscriber Member tashley's Avatar
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    Re: Sony 24-70 F2.8 GM Tests

    Quote Originally Posted by Vivek View Post
    If the use pertains to testing, it certainly makes sense, Tim.
    (fwiw, There are even blog articles on how to test a lens with diy instructions)

    You tell me if this system has fewer lenses (not considering the ones involving adapters and specialty manual focus ones) or not.
    Fewer than what? I mean, I've had Leica, Phase One, Canon and Nikon systems and a brief foray into Micro 4/3rds and actually for the range of lenses I want, I have, with the recent new arrivals from Sony in FE mount, as much choice as I could want in native glass and a massive range of other possibilities with adaptors. For me, wide availability of lenses is one of the defining features of the system.

  47. #47
    Administrator, Instructor Guy Mancuso's Avatar
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    Re: Sony 24-70 F2.8 GM Tests

    Yea the right side looks like it's smearing or just plain out of focus. Weird
    Photography is all about experimentation and without it you will never learn art.

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  48. #48
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    Re: Sony 24-70 F2.8 GM Tests

    Quote Originally Posted by Guy Mancuso View Post
    Yea the right side looks like it's smearing or just plain out of focus. Weird
    Thanks for looking Guy. It's quite odd isn't it? No problem at 24 and 50mm and the smear shifts to the left hand side at 70mm but it's basically not useable as a zoom. Time to swap it out.

  49. #49
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    Re: Sony 24-70 F2.8 GM Tests

    Yea your the 3rd one I heard the same thing. Complicated lens design, so not really surprised in a way. My thinking there is a element alignment out . Could be very minor though but causes the issue. I'm assuming this though. Being a zoom they are pardon this term but built a little lose as all of them are because it has a lot of internal movement with zooming. It's my guess though but from what we know not all focal lengths are not great at every focal length. The weakest on this zoom is 70 although at F4 on center it's very good bout corners I would say F 8 to be safe. Not the case on the other side at 24mm which is actually brilliant even wide open but corners I would say get really good at F 4 and 5.6 optimum. So you can see that difference but totally the same as every zoom as there always seems to be a weak spot somewhere. This zoom will kick a lot of primes to the curb though from 24-50 and that's pretty amazing
    Photography is all about experimentation and without it you will never learn art.

    www.guymancusophotography.com
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  50. #50
    Senior Member Quentin_Bargate's Avatar
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    Re: Sony 24-70 F2.8 GM Tests

    I've cancelled my 24-70mm F/2.8 order. It's huge lens, I have the Zeiss F/4 variant already which is not perfect, but pretty decent and I don't want the risk of sample variation.

    I think I'm a prime man at heart. Less to go wrong. I will spend the money saved on a prime or two.
    Quentin Bargate
    Director of Bargate Murray, Law Firm of the Year 2012 - 2017, Ēleading individualĒ, Chambers HNW guide, 2017, Photographer

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