Archived posting to the Leica Users Group, 2008/06/20
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Frank, In the case of the 10.5mm fisheye, the image you get on a full frame digital camera or a film camera looks kinda like a clearly defined keyhole in the middle of the frame. Other DX lenses like the 18-200 zoom do not fill the frame at the wide end. The 1.5x crop with these two lenses is the only practical solution if you have a large number of photos to process. You are not losing information with the crop because there is none to lose. The vignetting I mentioned is on full frame, older lenses, like the AFS 17-35mm when used on the D3. The vignetting on this lens is unacceptable for a professional lens which this is. To a lesser degree the AFS VR 70-200 lens has the same problem. Len On Jun 20, 2008, at 12:12 AM, Frank Filippone wrote: > I guess that while your explanation makes perfect sense, in practice: > if I have the choice of either having a bigger file with more data > in it to > decide later, on my computer screen what I want to crop, > why would I want to initially crop in the camera and maybe miss > something in > the heat of shooting? > > Vignetting in easily cropped out later...... which is the issue > with DX > lenses used on an FX body ( if I have the nomenclature correct...) > > I am still missing something..... > > Frank Filippone > red735i@earthlink.net > > > > The reason to publish FX and DX specs is the full frame Nikons can > use the Nikon Dx lenses that were released before the full frame > cameras came out. The D3 can automatically switch to DX mode when > these lenses are used. Nikon hardly ever obsoletes their lenses. As > Chris mentioned he can use his 10.5 MP fisheye on his D3 even though > it was designed for the 1.5 X crop bodies. > > Len > > > On Jun 19, 2008, at 6:21 PM, Frank Filippone wrote: > >> Question: >> >> There appears to be a trend to publish the image (pixel) sizes of >> the image >> both for FX and DX formats.... >> >> Why would any rational person use a DX ( smaller) format if he had >> the >> larger format available to him? ( It is called cropping..... in old >> fashioned speak) > > > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information