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Thread: 280/2.8 APO Telyt Question

  1. #51
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    Re: 280/2.8 APO Telyt Question

    Quote Originally Posted by dhsimmonds View Post
    As a matter of interest does the 280/2.8 also need a matte screen to focus? Or is it just when using a converter with either the 280/2.8 or 105-280.4.2?
    I have a 400D, had a 200 1.8, and have a 105-280. The 400D, my AF is quite dodgy with 200 1.8.... Had a lot of luck focusing with normal focus screen and 105-280, this is probably under exposed a bit...

  2. #52
    Senior Member dhsimmonds's Avatar
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    Re: 280/2.8 APO Telyt Question

    Thanks Wayne, a very convincing image with such low light!

    Also thanks to JAAP fot another couple of convincing images. Are these also focused with the standard screen?

    BTW my 105-280 is on route to me as I write!
    Cheers, Dave
    www.simmondsphotography.com

  3. #53
    Subscriber Member jaapv's Avatar
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    Re: 280/2.8 APO Telyt Question

    I'm still waitng for the full matte, Dave, long wait.. A few test shots here.
    I'm VERY pleased with this lens.
    It has all the sharpness, bokeh, detail rendering and plasticity (read microcontrast) one could wish for. The only thing I miss from the 4.0/280 apo is that internal focussing! I think I missed focus slightly on the swan.
    All three are with the 1.4x converter.







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  4. #54
    Subscriber gogopix's Avatar
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    Re: 280/2.8 APO Telyt Question

    Quote Originally Posted by jaapv View Post
    Well, 2500 for the lens and 500 for the converter both of them demo ex+ grade was not expensive imo.
    euros, yes?

    anyway, I am looking for a 1.4x and I asxszume it works on the 105-280 without interference. Some lenses (180 2.8? do not, something about rear lens too deep.

    Images look great with 105-280 I assume yes? at what end (also with 1.4x?

    victor

  5. #55
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    Re: 280/2.8 APO Telyt Question

    The front element on the 1.4 extends very (some would say unnaturally...) deeply into the receiving lens. If the rear element of the lens doesn't have something like 1" or so of minimum clearance between the glass and the mount, she no work.

    One of the biggest PITA with R lenses is the slim number of lenses that will take the 1.4x. The thing just screams for a redesign. On my 180/2 the 1.4 made no notable difference in IQ, but interestingly enough, did come up as F3.2 vs the expected F2.8. That front element of the 1.4x is a VERY skinny light pipe vs the rear element of some of the lenses it bolts to.

    The 2x on my 180/2.8 APO and on a test RobSteve did for me using his (now gone) 90 AA, it knocked the snot out of the resolution of both lenses. It got better if you went a further 2 or so stops down, but...

    On the 105-280, RobS and I did a side-by-side test of it against my 180/2.8 APO and his 180/3.4 APO but we I don't think we tested any with converters.

  6. #56
    Subscriber Member jaapv's Avatar
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    Re: 280/2.8 APO Telyt Question

    Quote Originally Posted by gogopix View Post
    euros, yes?

    anyway, I am looking for a 1.4x and I asxszume it works on the 105-280 without interference. Some lenses (180 2.8? do not, something about rear lens too deep.

    Images look great with 105-280 I assume yes? at what end (also with 1.4x?

    victor
    1.4x mounted and lens at 280, makes 400 @ just over 5.6, effective 520. Not bad for length and speed,and the full res images are great. The sheep, which I took in the distance I take most of my wildlife shots, was very convincing. I am itching to replace it with a leopard
    The bird shots I should be able to better; I am still in the learning curve for the handling, I miss the grip to the focus ring from time to time, used as I am to the wide ring on the 280/4.0apo.
    Last edited by jaapv; 8th April 2008 at 09:08.
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  7. #57
    Subscriber Member jaapv's Avatar
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    Re: 280/2.8 APO Telyt Question

    Quote Originally Posted by robmac View Post

    The 2x on my 180/2.8 APO and on a test RobSteve did for me using his (now gone) 90 AA, it knocked the snot out of the resolution of both lenses. It got better if you went a further 2 or so stops down, but...

    On the 105-280, RobS and I did a side-by-side test of it against my 180/2.8 APO and his 180/3.4 APO but we I don't think we tested any with converters.
    Did you use the 2x apo for that? there is a huge difference between the non- apo and apo. I used the 2xapo often in my film days and it was excellent on the 2804.0apo, no need to stop down. Even stacking the two on the 280 yielded good results wide open (except in the far corners). The resulting 800/11 was a beast to handle, but it was doable with a beanbag. I see I need to pick up a 2x apo converter, reading my own post.I have not shot them side by side yet, but I feel the 105-280 @ 180 does outperform the venerable 3.4/180apo. What are your findings?
    Last edited by jaapv; 8th April 2008 at 09:51.
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  8. #58
    Senior Member dhsimmonds's Avatar
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    Re: 280/2.8 APO Telyt Question

    Cracking shots, did you use a tripod or shoulder harness as they are very sharp for handholding such a heavy lens?

    Mine has arrived done a few handheld shots only so far,
    Cheers, Dave
    www.simmondsphotography.com

  9. #59
    Subscriber Member jaapv's Avatar
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    Re: 280/2.8 APO Telyt Question

    No, just handheld, Dave, thanks. I've been using this kind of rig for many years, I guess I have developed "Tele-muscles" by now. I am thinking of adding a pistol grip or light shoulder pod for convenience though. Unfortunately Don Goldberg cannot find the Leica pistol grip he was selling.
    Judging by your avatar you must know about the use of long lenses in the bush. A bean bag at best and forget about a heavy tripod....
    JAAP
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    The colours of my generation are black and white.

  10. #60
    diglloyd
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    Re: 280/2.8 APO Telyt Question

    I'd like to find a mint or near-mint 280/4 APO if anyone wants to part with theirs. While I do have the Canon 300/2.8L, it "fills up the backpack" so to speak, making it useless for shooting on the go.

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