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Thread: Pentax 110 lenses - Picture Thread

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    Senior Member petermcwerner's Avatar
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    Pentax 110 lenses - Picture Thread

    The following pictures have all been taken with a Pentax 110 18mm/2.8 lens fully open. The lens has no diaphragm and was mounted on the G1 through the Hawk adapter. All pictures hand held, uncropped, re-sized for the web and slightly sharpened. RAW files developed with RAW Therapee and resized with Gimp.




    Vines - in the Background Lake Geneva and French Alps



    Rose Trees



    Wood near Gilly




    Vinzel Pond




    Bursins Pond




    Laboured Soil




    After the wedding party ?




    Dead Leaves
    Peter Werner
    Leica M8, R9+DMR & Digilux 2; Nikon D700; Panasonic FX01, FX150 & G1; Samsung TL350 (WB 2000)

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    Re: Pentax 110 lenses - Picture Thread

    Nice, Peter. It has quite a 'hotspot' in sharpness! Must go and use mine. And compare it to the zoom. Hood or no hood?
    "You live and learn; at any rate you live" (Douglas Adams)

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    Senior Member pellicle's Avatar
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    Re: Pentax 110 lenses - Picture Thread

    rob

    It has quite a 'hotspot' in sharpness!
    found the same with my 18 and 24 ... the 50 less so. As the 50 wide makes a nice portrait lens its my 'keeper' (but I'm not selling the other two ;-)

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    Senior Member petermcwerner's Avatar
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    Re: Pentax 110 lenses - Picture Thread

    Quote Originally Posted by laptoprob View Post
    Nice, Peter.
    Thank you.

    It has quite a 'hotspot' in sharpness! Must go and use mine. And compare it to the zoom. Hood or no hood?
    I always use a hood, not only with this lens. Here it is doubly important. Although in the following picture there was no direct sun hitting the lens, you can see that the lens does not like big contrasts. I wonder whether this is what you mean by hotspot.

    Also, DOF coverage is quite small at f/2.8. In the Rose Tree picture, where DOF is shallow, the corners are quite sharp; same for the Dead Leaves.

    found the same with my 18 and 24 ... the 50 less so.
    The 24mm is on it’s way, I am curious to see how it performs. I am less interested in the 50 as over the years I have collected quite a few lenses of this focal length (Zeiss Pancolar and Ultron, Kern Macro Switar, Nikkors, Elmar, Cooke Speed Panchro and Kinetal, Schneider Xenon, Old Delft Alfinon, Russian Helios and more)




    Problem with contrasty subjects
    Last edited by petermcwerner; 22nd February 2010 at 04:18.
    Peter Werner
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    Senior Member pellicle's Avatar
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    Re: Pentax 110 lenses - Picture Thread

    Hi Peter

    Quote Originally Posted by petermcwerner View Post
    I am less interested in the 50 as I already have quite a few lenses with this focal length (Zeiss Pancolar and Ultron, Kern Macro Switar, Nikkors, Elmar, Cooke Speed Panchro and more)

    Problem with contrasty subjects
    [/CENTER]
    of course, I'm occasoinally using my FD f1.4 still too, espeically for shots of stuff that I use on my blog mainly because I do want to stop down. For stick it in the pocket stuff.

    BTW: looking at that image it appears you have flare on the lens with the sun being just out of view. I sometimes use my hand to cast a shadow over the lens, and sometimes a hood isn't enough.

    Did you read my blog post on the 110's?

    I worked in some snow conditions and didn't find the same
    Last edited by pellicle; 22nd February 2010 at 04:27.

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    Senior Member petermcwerner's Avatar
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    Re: Pentax 110 lenses - Picture Thread

    Quote Originally Posted by pellicle View Post
    I sometimes use my hand to cast a shadow over the lens, and sometimes a hood isn't enough.
    True enough, but difficult to do when hand held. This lens has a serious flare problem and initially I wanted to call this thread A Lens NOT to buy

    Did you read my blog post on this?
    No, could you please give me the address?

    Cheers
    Peter
    Peter Werner
    Leica M8, R9+DMR & Digilux 2; Nikon D700; Panasonic FX01, FX150 & G1; Samsung TL350 (WB 2000)

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    Senior Member petermcwerner's Avatar
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    Re: Pentax 110 lenses - Picture Thread



    Another example of bad flare
    Peter Werner
    Leica M8, R9+DMR & Digilux 2; Nikon D700; Panasonic FX01, FX150 & G1; Samsung TL350 (WB 2000)

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    Senior Member pellicle's Avatar
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    Re: Pentax 110 lenses - Picture Thread

    Hi

    Quote Originally Posted by petermcwerner View Post
    True enough, but difficult to do when hand held. This lens has a serious flare problem and initially I wanted to call this thread A Lens NOT to buy

    No, could you please give me the address?

    Cheers
    Peter
    blog post is here

    I normally shield with one hand while holding camera with there other. I can clearly see when my fingers start to intrude in the image and when the shadow hits the lens front (by the contrast drop). I keep my hands as far away as I can from the lens (making their entry into the view clearer)

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    Re: Pentax 110 lenses - Picture Thread

    Thanks for the thread.... I'm waiting for my adapter.......
    http://hodad66.com Sony A7r,A7II, Sony 70-300G, Rokinon 14/2.8, Leitz Wetzler 35/3.5, Leica R Summicron 50/2 & Elmarit 90mm/2.8, Contax N 24-85 & 70--200mm AND Canon FD 20/2.8, 135/2, 500mm 4.5, Minolta 35/1.8, 45mm/2, Nikon 28-50/3.5, 105/1.8, 180/2.8

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    Re: Pentax 110 lenses - Picture Thread



    just got the adapter and this is the first jpg reduced to700
    and slightly sharpened (in reduction)

    the 18mm/2.8



    70mm with the soligar 2X



    the 24mm with a Pentax close-up filter
    on my bare knees
    in rocks
    hand held
    Last edited by hodad66; 22nd February 2010 at 13:46.
    http://hodad66.com Sony A7r,A7II, Sony 70-300G, Rokinon 14/2.8, Leitz Wetzler 35/3.5, Leica R Summicron 50/2 & Elmarit 90mm/2.8, Contax N 24-85 & 70--200mm AND Canon FD 20/2.8, 135/2, 500mm 4.5, Minolta 35/1.8, 45mm/2, Nikon 28-50/3.5, 105/1.8, 180/2.8

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    Senior Member pellicle's Avatar
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    Re: Pentax 110 lenses - Picture Thread

    Quote Originally Posted by hodad66 View Post


    the 24mm with a Pentax close-up filter
    on my bare knees
    in rocks
    hand held
    another artist sacrifices himself for his art

    but its a lovely shot in balance of colour. Can I ask why all the grain in the out of focus areas?

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    Senior Member petermcwerner's Avatar
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    Re: Pentax 110 lenses - Picture Thread

    Quote Originally Posted by hodad66 View Post
    just got the adapter and this is the first jpg reduced to700 and slightly sharpened (in reduction)
    Thank you for your contribution. Nice subjects, but

    the 18mm/2.8
    seems to have a problem of flare and/or ghosting

    70mm with the soligar 2X
    Nice picture and technically fine

    the 24mm with a Pentax close-up filteron my bare knees in rocks
    hand held
    Lovely shot but lots of noise in the background leaves, as already noted by pellicle. High ISO? Heavily cropped?

    Cheers
    Peter
    Last edited by petermcwerner; 22nd February 2010 at 22:13.
    Peter Werner
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    Senior Member pellicle's Avatar
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    Re: Pentax 110 lenses - Picture Thread

    Hodad

    Quote Originally Posted by petermcwerner View Post
    Thank you for your contribution. Nice subjects, but

    seems to have a problem of flare and/or ghosting
    I think I see what Peter is saying, have you checked the optics? My 18 and 24 were rather dusty (front and back). I cleared this up with a bit of soft toilet tissue rolled into a "pen" and a quick squirt of "windex" on the end to use it as a swab

    works wonders

    don't go spakko on it, but the chromatic coatings aren't harmed with a gentle clean like that with windex (assuming the formula is the same in Florida as it is in Australia / Finland)

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    Re: Pentax 110 lenses - Picture Thread

    the lenses have been untouched.... no cleaning. ghosting?
    maybe it's the light leak in the adapter. As to grain..... yes,
    this one I cropped and I believe I upped the ISO as it was
    overcast, hand held, on my knees, bent over one foot from
    the ground!!! Man, you guys are tough......
    http://hodad66.com Sony A7r,A7II, Sony 70-300G, Rokinon 14/2.8, Leitz Wetzler 35/3.5, Leica R Summicron 50/2 & Elmarit 90mm/2.8, Contax N 24-85 & 70--200mm AND Canon FD 20/2.8, 135/2, 500mm 4.5, Minolta 35/1.8, 45mm/2, Nikon 28-50/3.5, 105/1.8, 180/2.8

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    Senior Member pellicle's Avatar
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    Re: Pentax 110 lenses - Picture Thread

    Quote Originally Posted by hodad66 View Post
    Man, you guys are tough......
    but it hurts us more ;-)

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    Re: Pentax 110 lenses - Picture Thread

    Peter, since we were talking about flare, I thought I'd spend a few moments and plop this together

    http://cjeastwd.blogspot.com/2010/02...ies-flare.html

    FD 1.4, 1.8 OM 1.8 and Pentax 110

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    Re: Pentax 110 lenses - Picture Thread

    Quote Originally Posted by pellicle View Post
    Peter, since we were talking about flare, I thought I'd spend a few moments and plop this together
    FD 1.4, 1.8 OM 1.8 and Pentax 110
    Thank you for your test; it is quite revealing. When there is another sunny day (not soon according to the weather forecast) I shall try to make comparison shots of the 18mm Pentax 110 with my only other 18mm lens a Cooke Speed Panchro III (BTW, not exactly the same price league....)
    Peter Werner
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    Re: Pentax 110 lenses - Picture Thread

    Quote Originally Posted by pellicle View Post
    Peter, since we were talking about flare, I thought I'd spend a few moments and plop this together
    pellicle,

    flare tests can be fun. There are two things coming to my mind looking at your setup. Obvious maybe, but anyway;

    1) Tube light is flickering light. It changes all the time. To be sure to get "accurate" colour using tubes one has to use a long shutter time. What shutter times did you end up with in your test?

    2) It's always iffy comparing lenses at different lens openings. The Pentax f/2.8 lens did well, in some aspects. But, how well would the other lenses have performed if stopped down to f/2.8? Now we of course want to know how the lens behaves wide open so I just mention it.

    Anyway, I suspect you used shorter shutter times than around 1/12 which I think would be the fastest one can go and be sure about the colour. As you used Auto WB on the camera that is another factor also making it impossible to say anything about the colours you got.

    Yes, I know, never criticize another person's test procedure... I like all lens comparisons and thank you for the images!

    /Jonas

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    Senior Member pellicle's Avatar
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    Re: Pentax 110 lenses - Picture Thread

    Jonas


    Quote Originally Posted by Jonas View Post
    1) Tube light is flickering light. It changes all the time. To be sure to get "accurate" colour using tubes one has to use a long shutter time. What shutter times did you end up with in your test?
    interesting point ... it was 1/200th and since AC cycle is 60 times per sec I'd need to use something like 1/20th or so

    I did not think of your point but as it happened I took 2 sets exposures with each lens and (only published the last set) and I saw similar results each time for the lenses ... its a good point and I'll try to take that out of the equation.

    I was looking at this site
    http://www.16-9.net/lens_tests/24mmc...mm_final2.html

    which looked like a similar alternating current light source.
    I was wanting
    2) It's always iffy comparing lenses at different lens openings. The Pentax f/2.8 lens did well, in some aspects. But, how well would the other lenses have performed if stopped down to f/2.8? Now we of course want to know how the lens behaves wide open so I just mention it.
    2.8 is wide open ... the lens actually has no aperture. So as stated my test was to compare lenses wide open.

    Yes, I know, never criticize another person's test procedure...
    not at all ... criticism forms the basis of our system (in science)

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    Re: Pentax 110 lenses - Picture Thread

    Quote Originally Posted by pellicle View Post
    interesting point ... it was 1/200th and since AC cycle is 60 times per sec I'd need to use something like 1/20th or so

    I did not think of your point but as it happened I took 2 sets exposures with each lens and (only published the last set) and I saw similar results each time for the lenses ... its a good point and I'll try to take that out of the equation.

    I was looking at this site
    http://www.16-9.net/lens_tests/24mmc...mm_final2.html

    which looked like a similar alternating current light source.
    I think Hubsand (the 16-9.net world cup referee) uses a Halogen lamp. That's probably as safe as an ordinary and sadly old fashioned bulb. We are slower in Sweden btw, 50Hz sort of folks.

    But you got the same result in both your series. Hmm. I can't explain that... I would expect some differences and also uneven light over the image. Maybe your tube is a better source than I thought.

    Cheers,

    /Jonas

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    Re: Pentax 110 lenses - Picture Thread

    It seems to me as one really need an adapter with an aperture mechanism for the Pentax 110 lenses. I'm pretty sure everything would be better if the lenses are stopped down, perhaps just one stop or so.

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    Re: Pentax 110 lenses - Picture Thread

    Jonas

    just did a quick add to what was there ...



    its on the blog

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    Re: Pentax 110 lenses - Picture Thread

    Quote Originally Posted by Jonas View Post
    I think Hubsand (the 16-9.net world cup referee) uses a Halogen lamp. That's probably as safe as an ordinary and sadly old fashioned bulb.
    I know from my misspent youth in electronics that there is intensity change in tungsten bulbs too ... how much I can't say. I dunno how fast or otherwise phosphors really change and how much amplitude change there would be in the intensity cycle.

    We are slower in Sweden btw, 50Hz sort of folks.
    hmm ... well finland is probably the same ... I'm probably just thinking of Australia

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    Re: Pentax 110 lenses - Picture Thread

    Quote Originally Posted by pellicle View Post
    just did a quick add to what was there ...



    its on the blog
    I visited your blog and had a look. Different characters, no? I don't think the second flare test is to the Pentax lens' disadvantage. That sort of headlight intensive flare usually gets worse when stopping down.

    Thank you for adding to the Pentax 110 lens knowledge.

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    Re: Pentax 110 lenses - Picture Thread

    Quote Originally Posted by pellicle View Post
    I know from my misspent youth in electronics that there is intensity change in tungsten bulbs too ... how much I can't say. I dunno how fast or otherwise phosphors really change and how much amplitude change there would be in the intensity cycle.
    It's probably best to try with the tubes you have at home. Just take a series of images slowly changing the shutter time, use a bench or some other area evenly lit by the tube as target. My findings are that the tubes are the worst lights sources here in my apartment (about 1/15 sec is OK). Ordnary bulbs and halogen bulbs are OK. Energy savers are a mixed lot.

    regards,

    /Jonas

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    Re: Pentax 110 lenses - Picture Thread

    Jonas

    here is the first series



    there seems to be less variation between the FD's but I can't really explain why the bottom row show consistently more blue in the tiles and less green.

    I stood in the same place to take each image...

    I think I need to review this test more carefully
    Last edited by pellicle; 23rd February 2010 at 10:47.

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    Re: Pentax 110 lenses - Picture Thread

    Hi

    Quote Originally Posted by Jonas View Post
    Different characters, no? I don't think the second flare test is to the Pentax lens' disadvantage. That sort of headlight intensive flare usually gets worse when stopping down.
    me in all of them :-)

    interesting point about the headlight flare

    thanks

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    Senior Member petermcwerner's Avatar
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    Re: Pentax 110 lenses - Picture Thread

    Just got the 25mm, but still waiting for a lens shade. More will follow when the shade arrives.


    Peter Werner
    Leica M8, R9+DMR & Digilux 2; Nikon D700; Panasonic FX01, FX150 & G1; Samsung TL350 (WB 2000)

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