Vignetting when I switch from 50mm to 28mm. why? Don't get it. help.

Richard J. Johnson

Richard J. Johnson

Joystick Member
My Nikon 28mm 2.8 is vignetting like crazy but the 50mm has none at all. I don't know what to do. I don't want to mess the focus because it is fixed on the 50mm lens perfectly. I tried all types of lighting, ND filter and Iris changes but it still looks crazy. 28mm is for wider shots correct? Or do I need to set up the LEX again and start with the 28mm. any help would be appreciated.
 
Yeah, zoom in more. When fully wide, you are also viewing the glass and filters you have on top of the lens. Zooming in should fix the issue. Lighting isn't going to change it at all. It is a matter of the glass you have on the lens.
 
And it will always be like that unless you move to Medium Format lenses.

Even CinePrimes have a few different sized rear elements. I thought, at once, that it was the reason everyone got soft edges but the rear element size arguement is moot.

Basically, if you stop trying to use SLR FOV then you won't have an issue. If you want to use the full FOV for each lens you will always have to readjust.

Even a 50mm Zeiss T2.1 has a larger rear element than a 24, etc. They all work for S35 FOV or 35mm FOV... stick to that and a lot of your problems will be alleviated.
 
Everyone talks about using 35mm fov but no one says how you frame for it. How is it done? I guess zooming in until you don't see the edges is SLR fov and something else must be s35 and 35mm but how do I do it?

And at which one is a 50mm a 50mm, because using a lens at a different fov has to bring some sort of focal length multiplier into effect, I just don't know what it is.
 
Generally a 2.8 lens has a smaller rear element than an f2. Thus more potential problems with vignetting. I get full coverage with a 28mm f2. More expensive though. On the other hand I also get full coverage with Nikon or Tokina f2.8 zooms.
 
I used my Nikon 28mm 2.8 D lens yesterday on a shoot. Sorry, but in comparison to my 50mm 1.4 and 85mm 1.8 AIS, this 28mm looks like crap. I do have to zoom in more to get rid of the vignetting and when I do that, the edges of the frame are very soft.

I can't see how anyone can expect to get professional results with the Nikon 28mm 2.8 D. I am going to have to save up for a better quality, faster wide angle.

Dan
 
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