D800 vignette

I just got to use my D800 for the first time and because I didn't know any better, I set it up so the vignette setting is off cause I wasn't sure I would need it.. Has anyone had the problem of dramatic vignetting? I was using my 70-200 f2.8 at 200mm f4 to f5 and at about 370mm with the 1.7 teleconverter at f5 and a polarizer on to take close ups of the crescent moon with a lot of blue sky and I got intense vignetting, especially at the 370mm. I haven't tried it yet with the vignette switch on cause I didn't notice it until I got a chance to really look at the pictures last night. Has anyone else had that experience and are you having to constantly work with the vignette settings? I'm going to test it with all my lenses now, but that really sucks if you have to fool with the vignette setting all the time. Help!! I'll post an image if needed.

I haven't messed with my vignette setting, but I haven't done much long lens work with it. One good thing with having so much data to work with is that you are able to get away with some cropping to get the closeness you are looking for. Sorry I couldn't be more help, but I am curious to see what you find out!

I shoot raw, so I don't bother with those settings in camera. Lightroom does a good job correcting those problems if you have them.

I shoot raw, too, but I've never a vignetting problem with my d300 with any lens, polarizer or not, and I'm shooting now with a better lens and a B & W top of the line polarizer. I'm not talking a little smidge of corner darkening, I literally see a very distinct lighter circle on the screen like I used a dx lens but not as dark on the periphery. Maybe it's just the jpg that is showing up on the screen that is showing it and when I bring it into Lightroom it won't be there. The camera comes with the vignette control set at normal, not off. So I'm going to do some testing with the controls in different positions. I'm looking forward to hearing more and if anybody shoots with it off and why one would.

Curious why you used a polarizer to photograph the moon?

I have it on most of the time but this time I was testing it to see if there as any problems with it. I had an accident with my equipment and it got tortured in salt water and was cleaned but I wasn't sure if it was repaired correctly. That really could be this issue, but we'll see after the testing with the vignette controls.

I suspect the 1.7 teleconverter could be causing some vignetting, as that can degrade the image quality, especially in low light situations. The polarizer could be an issue too and I leave it off unless I have a definite need to reduce glare, as it can reduce image quality especially with the D800 (other effects of the filter like darkening skies can be done instead in post-processing). Any filter at night can cause pronounced degradation in image quality, so I'd only test it with day shots if you want to see if it is repaired correctly.

If you're shooting with such a good camera and lens, I'd recommend shooting in RAW mode all the time. The vignetting settings in camera only affect jpeg images. You'll have better luck fixing vignetting issues in Lightroom with RAW images. RAW files keep all the data the camera captured, so you'll be able to bring out detail in darkened corners that could be lost in jpeg files.

I agree with Grant that the teleconverter is likely the culprit. Shooting in RAW will also give better results. I have zero vignetting issues with my d800e.

Thanks guys for your input! I always shoot in RAW and never do jpgs, but the screen shows a jpg image of the settings you use in the camera, so I'm thinking in addition to what you guys said about the teleconverter and possibly the polarizer, it could be just showing me the vignetting that I would get using this specific setting if the final output was a jpg. I'm doing the testing tomorrow. Ill let you know what the results are. So thank you all.