lens vignette full frame vs crop

T

treynolds

Well-known member
So i migrated to a d600 from a t2i and a few other canon crop cameras. I mostly shoot with either a 35mm f/2, 50mm f/1.8, 105mm f/2.8 macro, or my kit 28-85mm f/3.5.

I am noticing a lot of vignetting on my d600 especially on the 28-85 and the 105. Is this just something that comes with the territory of moving to a full frame? I know with photography stuff i can set the automatic lens correction on my d600 but i don't think this works in video mode. I don't mind it too much for most video work but this morning I was doing a green screen shoot and now looking at the footage in post my key really starts to fall off on the edges of the frame. I checked my background with a light meter and barely had a 1/3 fall off to the edge of the screen area i lit.

Is it just a setting in camera to turn on vignette control? Or is it just part of life with a full frame?

Anybody else have experience with this happening?
 
If you are having vignetting problems, it is probably because that lens isn't meant for a full frame camera.
 
i should note that its the 105mm 2.8G ED lens not the older 105mm D, the 24-85mm 3.5-4.5G ED VR, and then the 50mm 1.8D and the 35mm f/2 AI-s

and the G lenses are more trouble with vignetting than the D (with the specific lenses i own, i don't know if this is axiomatic)
 
atarijedi said:
If you are having vignetting problems, it is probably because that lens isn't meant for a full frame camera.
Click to expand...

Which lens are you referring to? the 105mm? I thought it was. I guess that's my fault. The 24-85mm however vignettes when i pull it wide to 24mm as well. Now i don't mean that the image circle completely cuts off in the corners, just darkens.
 
Yes, full frame cameras are more prone to vignetting.
I generally don't mind, but if it worries you too much, check that you're not adding anything in front of th elens that will cause this vignetting (even a step-up ring to make all your front caps the same size can cause vignetting on very wide lenses). Or close down your aperture a little bit: you don't need to go that wide on a FF sensor.
 
on the 24-85 i have a hood on there, on the 105mm i have nothing. I don't mind it when I'm shooting most things but for green screen work it really stuck out to me.
 
For greenscreen it's a problem, but it should clear out if you close your iris a stop or two (this also makes the lens sharper, usually, so it's a good idea anyway).
 
yeah i know its a good idea for green screen work. This shoot I was stopped down to 4.5 or 5.6 i believe.
 
Thanks Sam. That's a useful tool. It looks like if i am reading it correctly its not until f/8 that the lens doesn't really vignette much anymore. Looks like i am going to need to throw a lot more light at my green screen.
 
Well, at f/5.6 it's just a third of a stop on the very corner, but if that's still bothering you then yes, f/8 is even flatter.
If that's the level of requirement that you have, you can also consider buying or renting a different lens, one that has even less vignetting.
 
Yeah while I know I could easily pull a key with a 1/3 stop fall off my last green screen shoot was for another editor so I just wanted to get as clean and smooth of a key as possible. I am looking at other lenses to rent for future shoots as per your advise

Thanks
 
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