funky hmmm. I also tried a few lenses on my D700. While i'm a vignette fan, i think the DX lenses are just a bit to much. Funny to see that the vignette here isn't that round. Look at the top and bottom. The bottom looks more round...
You should get the Nikon 35mm F1.8 DX lens, its only $200, sharp wide open and vignettes very naturally on FX. Much softer transition and less "tv tube like" than the Sigma
I'm not sure about the 30 f/1.4 but many butterfly hoods can vingette like that, I believe. I know that if I put the hood on incorrectly on say a 10-20, it can be strangely uneven. Just curious, though. The OP hasn't answered.
Guidenet wrote:
I'm not sure about the 30 f/1.4 but many butterfly hoods can vingette like that, I believe. I know that if I put the hood on incorrectly on say a 10-20, it can be strangely uneven. Just curious, though. The OP hasn't answered.
Its vingetting because its a DX lens on a full frame FX body. The lens was not designed to have an image circle cover the FX sensor so as such you get black corners.
millsart wrote:
Its vingetting because its a DX lens on a full frame FX body. The lens was not designed to have an image circle cover the FX sensor so as such you get black corners.
I know that. I own and understand both DX and FX. The only thing I was wondering about was whether the cropped look was the image circle or a lens hood. It looks like a bit too much vignetting for just the DX effect, but maybe not. That's why I was wondering. The fact that the crop is not round, might tend to make me believe this is a butterfly hood extending beyond the crop. A hood designed for a specific focal length in a APS-C lens, might be significantly visible on an full frame sensor.
For example, when I put my gal's 35 f/1.8 on my D700 and use it in FX mode, I get almost no vignetting.
The image circle on DX lenses varies a lot from lens to lens and manufacturer to manufacturer. Many DX lenses cover a full frame sensor quite well. Many Zoom DX lenses cover FX at much of the zoom range.
To me, this looks more like a hood, than a constrained image circle and could be hiding the vignetting than would be visible without a hood. I'm don't know, not that it's any big deal. If this amount of vignetting is strictly the DX image circle, we certainly know not to try it on FX.
Guidenet wrote:
For example, when I put my gal's 35 f/1.8 on my D700 and use it in FX mode, I get almost no vignetting.
I have that lens as well for FX (don't even own any DX bodies lol) You are right it does have rather low vignetting but only at closer focus distance.
When you shoot more distant subjects the effect is much more pronounced.
I haven't noticed it that much of an issue though as I use it only for closer distances for wedding and event work.
There really seems to be no rhyme or reason to what DX glass works and what doesn't though. The 16-85 DX zoom for example vignettes heavily at any focal length but then others might work on the longer end.
One other thing I found was that while some project a usable image circle. such as the 11-16mm zoom at 16mm, the corners are very very soft.
I believe that no hood was attached on that lens. I have also tried the Sigma 1.4 on my D700 and it will really produce that kind of vignetting even without the hood.
millsart wrote:
One other thing I found was that while some project a usable image circle. such as the 11-16mm zoom at 16mm, the corners are very very soft.
I've heard that it's quite soft on FX. The 12-24 is quite sharp, I've heard, from somewhere around 16mm out. I don't own it so don't know. Other than the 35, I've not tried the rest of my DX kit. Actually, I think I only have three DX lenses left, the 10.5, 10-20 Sig and the Tamron 17-50. I can imagine every buying a DX lens again, but who knows. When NAS bites, it sometimes makes no sense.
I tried the 12-24 AF-S on the D700 in FX mode...
At 16mm onwards vignetting isnt much of an issue but i have included 100% crops of centre and edge.....
