stringplayer Loc: Atlanta, GA

Hello. I have a question regarding vignetting. Last week at Hilton Head I took the attached photo of a royal tern about to sit down and enjoy a shrimp cocktail. (Yea, lucky shot. Tell me about it!) Anyway, I used a Nikon D810 with a Sigma 150-500mm f5-6.3 lens; original hood attached. ISO was 800. Focal length was 200mm. Exposure was 1/2500 at f/11. I was able to get rid of the vignetting easily using LR. Any ideas why I got the vignette effect in the first place? Thanks so much.

Original shot


LR lens profile correction


Cropped

OddJobber Loc: Portland, OR

It did it because it does that. :)

Here's a quote from Thom Hogan's review and other reviews are similar.
"Vignetting is evident in the corners at 500mm on FX bodies, at all apertures. It's not huge (less than a stop wide open), but it's clearly visible. At 150mm, vignetting is minimal wide open (very corners clip slightly) and essentially non-existent by f/11. The in-between focal length ranges are, not surprisingly, somewhere in between those two. Vignetting isn't really an issue on DX."

stringplayer Loc: Atlanta, GA

Thanks for the prompt response, OJ. Thom Hogan's review was very helpful.

Thanks also for your first sentence. I can see a lot of potential there! :)

OddJobber Loc: Portland, OR

I get the vignette too, especially with plain backgrounds (sky). It doesn't bother me since, like your bird shot I want to see what's in the middle of the frame and frequently crop anyway. :)