Minor vignetting help

I am using the Nikon D750 and a Nikon AF-S NIKKOR 85mm f/1.8G Lens. I have a Tiffen 67mm Black Pro-Mist 1 filter attached with the HB-62 Bayonet Lens Hood that came with camera. Some of my shots had very, minor vignetting at the top corners. One in particular (see attached image) bothered me. Can anyone tell me what caused this? Help.

 

Could be flash falloff, or just 'normal' lens vignetting that you get at wider apertures.

 

If you look hard enough you'll detect vignetting with almost any lens at apertures wider than f/5.6.

 

Sometimes you get a hard shadow from a lenshood shading the flash. I don't see that here.

. . . 'normal' lens vignetting that you get at wider apertures.

 

+1

 

EXIF reveals your shot was pulled with a D750 using an 85mm Prime Lens, at F/2

 

I use Canon DSLR: the EF 85/1.8 when used at F/2 has similar vignette.

 

It's more noticeable on the top corners of your image, because that's where the light background walls are located.

 

WW

Thanks guy. Probably expected that. Wouldn't hurt to have used full bounce flash, either. OK. That's my answer. Thanks again.

A. when you start stacking things on the front of any lens, it doesn't take long to get to vignetting.

2.as said above, lens and light fall-off