I am confused by Nikon's own literature regarding warnings for the use of the AF-S 17-35 f/2.8D IF-ED, AF 20-35 f/2.8D, and the AF-S 28-70 f/2.8D IF-ED.
Nikon is warning of vignetting problems at the wide angle end of the lens.
Can someone explain why this would be a problem with the D100 and not any of their regular film cameras? In fact, the problem should be worse with the film cameras given that the negative size is larger. I would expect any vignetting of these lenses to fall outside the smaller CCD sensor area (compared with film).
Perhaps you can do us a favour and try shooting at 20mm at a wide range of aperature settings? I am just wondering if aperature has anything to do with the warnings -- perhaps when the lens is fully open or fully stopped down? Just a thought.
I love digital... Just moments after receiving your message notification I was able to fire up the D100 and fire a few test images at different apertures using my 20-35mm. I used every full aperture from f2.8 to f22. The results? No vingetting... I am unable to post the results at this time (I have to go to a BMX event Germany in the morning and I need some sleep . When I get back I'll post them then.. (unless someone else does the test)
I think this is likely a reference to the section in the manual (page 101) where it warns that you may have problems with the built-in flash failing to adequately illumiate the subject if you use it with one of these three lenses.
Ooops. My mistake. The information I was referring to was a .pdf sales brochure from the Nikon web site.
In any event I completely glossed over the statement that the vignetting problem specific to the use of those lenses when used with the built in Speedlight.
But this brings to mind a follow-up question. Why the warning on those three lenses and not others. If it's a question of Speedlight coverage then won't the problem show up in all of their wide angle prime lenses too?
I assume the answer to this is that Nikon expects users to be aware of vignetting problems when using the cheap built-in flash with wide-angle lenses. But when using their zooms Nikon wants to let people know at what focal length vignetting becomes an issue.
I guess the reason for specifically mentioning these three lenses is that they're so physically large they'll cast shadows if you get too close to your subject at a wide angle setting. As an example, when using the 28-70mm (the largest of the three) the manual says you need to be at least 2.0m from the subject at 28mm, but only 0.7m at 35mm.
>I am confused by Nikon's own literature regarding warnings >for the use of the AF-S 17-35 f/2.8D IF-ED, AF 20-35 f/2.8D, >and the AF-S 28-70 f/2.8D IF-ED. > >Nikon is warning of vignetting problems at the wide angle >end of the lens. > >Can someone explain why this would be a problem with the >D100 and not any of their regular film cameras? In fact, >the problem should be worse with the film cameras given that >the negative size is larger. I would expect any vignetting >of these lenses to fall outside the smaller CCD sensor area >(compared with film). > >Anyone have an explanation for this?
The petite built-in flash and the relative huge size of these lenses (in particular, with their big hoods attached) is the explanation. Of course the camera itself will record images without vignetting, if you refrain from using flash on the D100.
I recall seeing similar warnings for some of their film-based cameras too.