QUOTE(Mavik @ Jan 11 2008, 04:13 PM)
Totally not a true statement at all. Both Nikon and Canon have full frame lenses which ranges from fish eye, wide angle all the way till telephoto. Just because the D3 is the first full frame DSLR, it doesn't mean that Nikon doesn't have long telephoto lens for their old SLR ranges. As for Canon, just look at their wide ranges of lenses for their already long list of FF DSLRs.
Also the above mentioned DX 17-55mm is not a full frame lens. Full frame lenses for Nikon would be the FX lenses and not the DX lens.
http://en.wikipedia.org/wiki/Nikon_DX_formathttp://en.wikipedia.org/wiki/Full-frame_digital_SLRFirstly, i clearly stated
DX 17-55mm and nvr said it was full frame. pls read properly
Secondly, i think you misunderstood my meaning as you were comparing FF
bodies..what i was suggesting is comparing the use of both FF and DX lenses on
APS-C bodies..the subject of FF bodies was nvr brought up..i do get what you mean though..DX lenses are made equivalent to the 135-format as i will state below.
happy shooting!
Added on January 11, 2008, 6:32 pmQUOTE(timothyy @ Jan 11 2008, 05:58 PM)
Based on the above remarks, vignetting only occurs if we use DX lenses on full frame sensors... e.g. D3.
not 100% right there

, there're many types of vignetting, all lenses have a certain degree of vignetting (just depends how much)..if we're now putting a camera with APS-C sensor in comparison, a Full Frame lens will have less vignetting than a DX lens on a camera with APS-C sensor..
i think it's because an FF lens is designed for a sensor size of 36 x 23.9mm (approx)..so when it is used on an APS-C 23.6 x 15.8mm (approx), the sensor only utilises the sweet spot (centre region) of the FF lens..however, DX lenses have a reduced circle design which is why you can't use it on FF cameras coz the rear element coverage is smaller than the sensor itself..
Example:D300 w/ DX 17-55mm f/2.8 = more vignetting
D300 w/ FF 17-35mm f/2.8 = less vigneting
simply put, the FF 17-35mm will have less vignetting than DX 17-55mm although they're of quite similar focal range...you can check reviews and try it out for yourself..i've done both

once again, we're referring to your D300/D80 which uses an APS-C sensor..
QUOTE(timothyy @ Jan 11 2008, 05:58 PM)
The CONs
Not as wide
The PROs
Longer zoom, best for tele and macro.
in this case, it doesnt always happen..this is why we have DX lenses..Nikon has a 1.5x crop (Canon 1.6x, Olympus 2x).
this is why if you notice our
typical kit lenses are:
Nikkor 1.5x 18-55mm = 27-82.5mm / 28-80mm approx (35mm equivalent)
Canon 1.6x 18-55mm = 28.8-88mm / 28-80mm approx (35mm equivalent)
Zuiko 2.0x 14-42mm = 28-84mm / 28-80mm approx (35mm equivalent)
regardess on what digital body you buy, the typical kit zoom lens is usually 28-80mm (35mm equivalent)...so there isn't much PRO/CON comparison if you're using APS-C design lenses coz the lens' architecture is usually designed based on the 35mm equivalent variant (usually third party lens designs apply a 1.5x crop factor so if you're on an Olympus system thats a little set back).
FF has 28-200mm, DX has 18-135mm
FF has 28-300mm, DX has 18-200mm
FF has 17-35mm f/2.8, DX has 12-24mm f/4
FF has 28-80mm f/2.8, DX has 17-55mm f/2.8
notice how the DX lenses actually match the FF ones after you x1.5? so unless you're using FF lenses on a DX body, you haven't much to worry about comparing DX and FF lenses in terms of wide/tele ends...phew what a long post hope this helped

happy shooting!