Nikon F3 and focusing screens / vignetting

Another thread asking questions about focus screens!
I wonder if anyone has tried the "D" red dot screen?
I have one that came with my F3 and it's a bit dark and has a vignette. Is that normal?
With a 50mm 1.8 + 28-85mm 3.5 + 75-150mm 3.5 the view stays about the same.

If anyone has experience and photos with the "D"?
It would be useful to see photos of other focus screens in action to get a sense of what will be big bright and most useable in general photos. A resource to get an actual look at how these screens appear, instead of the useful (but static graphic) MIR website on focus screens

I've attached a photo of how the screen looks on the F3 I have...

Normal for this screen according to:

http://www.mir.com.my/rb/photography/hardwares/classics/michaeliu/cameras/shared/ff2screens.htm

Nicholas Lindan said:

Normal for this screen according to:

http://www.mir.com.my/rb/photography/hardwares/classics/michaeliu/cameras/shared/ff2screens.htm

Click to expand...

I've not seen this page before, a very useful guide!
Thanks!
I guess I can breathe a sigh of reliefe and know it's not the camera / aperture button and likely just the way the screen is. I wonder what the previous owner did with the camera - fitted with a D screen and a MD motor drive back door! Hmmm

The D is the matte screen, yes, it will vignette with many lenses. I have it.