ADavidhazy <andpph@xxxxxxxxxxxxxxxxxx> writes: >>> ... . Somebody, maybe Nikon, did, however, make a short focal >>> length lens that required the locking-up of the mirror to allow the >>> attachment of the lens to the body - meaning the SLR became a camera >>> that required an auxiliary optical finder for use. >> >>Many of the fisheye models, at least; checking the Moose book shows at >>least the 8mm f8, 7.5mm f5.6, 10mm f5.6, 6mm f5.6. The 6mm f2.8 and 8mm f2.8, >>however, work with the mirror in place, and actually let you view the >>image through the viewfinder! > > David, > > Right. That is what I meant ... the rule has been to make the wide > angle lenses work with the mirror down allowing viewing through the > lens. Did you find "the" exception to the rule I was trying to > decide if anyone ever made and that is a wide angle lens for an SLR > that required that the mirror be locked up? I really am not sure > _anyone_ made such a beast but maybe. I know Canon made a 38mm that > could only be used on the Pellix since it's mirror does not move and > thus has smaller space requirements. But I am trying to identify a > 21 or a 24 or something that would require mirror lock-up. I didn't find any, but I looked less closely at the less wide lenses; I expected it to be more likely among the older and wider models. (Are you making a sharp distinction between "fisheye" and "wide angle"? I've been treating the fisheye as just a special sub-category.) -- David Dyer-Bennet, <mailto:dd-b@xxxxxxxx>, <http://www.dd-b.net/dd-b/> RKBA: <http://noguns-nomoney.com/> <http://www.dd-b.net/carry/> Pics: <http://dd-b.lighthunters.net/> <http://www.dd-b.net/dd-b/SnapshotAlbum/> Dragaera/Steven Brust: <http://dragaera.info/>
