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ulrikft Offline Image Upload: Off p.1 #1 · D700/D3 + sigma 20 1.8, 24 1.8 or 28 1.8 Anyone got any examples with one of these combos wide open? I would love it if someone could do me the favor Oct 09, 2008 at 11:22 AM

Elan II Offline Image Upload: Off p.1 #2 · D700/D3 + sigma 20 1.8, 24 1.8 or 28 1.8 Makten got a 20 and he seems very happy with it. You can see his comments and some wide open images here: http://nikongear.com/smf/index.php?topic=11612.0 Oct 09, 2008 at 01:36 PM

ulrikft Offline Image Upload: Off p.1 #3 · D700/D3 + sigma 20 1.8, 24 1.8 or 28 1.8 Thanks a bunch! Oct 09, 2008 at 02:00 PM

Makten Offline Image Upload: Off p.1 #4 · D700/D3 + sigma 20 1.8, 24 1.8 or 28 1.8 Here I am! I don't have too many wide open examples, but the ones posted above speaks for themselves I guess. It's fully "usable" @ f/1.8, but you probably want to stop down to f/2.8 for some sort of reasonable sharpness, unless it is really really dark. The worst thing with this lens is the distortion, that's impossible to correct. If you crop the image to a FOV resembling APS-C, the distorsion is pure barrel shaped. But then it changes to wave shaped towards the edges of the full frame. This is not a good lens for any kind of architecture or such. Sharpness seems best at f/4, so it's not ideal for landscapes either. But on the other hand, that fast f/1.8 aperture is really unique for such a wide lens, so if you don't mind its weaknesses, have a go! Here's what you can do, for example. ISO 11200 and f/1.8. Oct 11, 2008 at 07:41 AM

ulrikft Offline Image Upload: Off p.1 #5 · D700/D3 + sigma 20 1.8, 24 1.8 or 28 1.8 Haha, really cool image! Thanks for the input! I might decide to go for the 24 1.8 instead, as it is a bit sharper across the frame. I have to test them both to decide I guess Oct 11, 2008 at 10:01 AM

phillip ino Offline Image Upload: On p.1 #6 · D700/D3 + sigma 20 1.8, 24 1.8 or 28 1.8 I don't have any wide open but here are some samples on the D700 http://www.fredmiranda.com/forum/topic/678629/1#6121894 http://www.fredmiranda.com/forum/topic/678629/0#6072924 EDITED LINKS Edited on Oct 11, 2008 at 08:39 PM · View previous versions Oct 11, 2008 at 03:48 PM

ulrikft Offline Image Upload: Off p.1 #7 · D700/D3 + sigma 20 1.8, 24 1.8 or 28 1.8 I got the 20 1.8 today, and I must say that I'm impressed Wide open, 100% crop: o-joy! But _man_ is thing wide on my new d700 :P Oct 11, 2008 at 05:27 PM

phillip ino Offline Image Upload: On p.1 #8 · D700/D3 + sigma 20 1.8, 24 1.8 or 28 1.8 Nice. These lenses get less credit than they should. The stigma of the Sigmas is unfortunate. Oct 11, 2008 at 06:27 PM

Elan II Offline Image Upload: Off p.1 #9 · D700/D3 + sigma 20 1.8, 24 1.8 or 28 1.8 Ahhh, what a happy gathering.. To put things in perspective, a 20/1.8 on FX has FOV resembling a 13mm lens on DX and DOF resembling an f/1.4 aperture. The speed is similar too, since you can easily bump the ISO up a stop over DX. How unique is that? Can you imagine a 13mm f/1.4 prime for DX? I know I would buy one. Oct 11, 2008 at 07:24 PM

Makten Offline Image Upload: Off p.1 #10 · D700/D3 + sigma 20 1.8, 24 1.8 or 28 1.8 Elan II wrote: Ahhh, what a happy gathering.. To put things in perspective, a 20/1.8 on FX has FOV resembling a 13mm lens on DX and DOF resembling an f/1.4 aperture. The speed is similar too, since you can easily bump the ISO up a stop over DX. How unique is that? Can you imagine a 13mm f/1.4 prime for DX? I know I would buy one. It's even worse! FX vs. DX is a 1.17 stop DOF difference, which means you would need a 13/1,2. 1.8*sqrt(2)^(-1.17) = 1.2 Oct 11, 2008 at 07:34 PM

James R Offline Image Upload: On p.1 #11 · D700/D3 + sigma 20 1.8, 24 1.8 or 28 1.8 ulrikft wrote: I got the 20 1.8 today, and I must say that I'm impressed Wide open, 100% crop: o-joy! But _man_ is thing wide on my new d700 :P You still shooting Canon or straight Nikon? Oct 11, 2008 at 08:35 PM

ulrikft Offline Image Upload: Off p.1 #12 · D700/D3 + sigma 20 1.8, 24 1.8 or 28 1.8 James R wrote: ulrikft wrote: I got the 20 1.8 today, and I must say that I'm impressed Wide open, 100% crop: o-joy! But _man_ is thing wide on my new d700 :P You still shooting Canon or straight Nikon? I got my 30d yet, but it is on it's way out. I guess I'm more of a "I like a tool that does the things that I like it to do"-guy than a "I don't care about the tool, as long as i have the 100% best IQ avilable"-guy :P I just think I like the product philosophy of nikon better. Oct 11, 2008 at 10:02 PM

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