Archived posting to the Leica Users Group, 2012/10/16
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]On the nikon the Image Circle @ Infinity is 154mm diameter @ f/4.5 235 diameter @ f/16 So wide open your not going to get it. But you never shoot a lens like this wide open or even close to wide open. Mark William Rabiner Photography http://gallery.leica-users.org/v/lugalrabs/ > From: Frank Filippone <red735i at verizon.net> > Reply-To: Leica Users Group <lug at leica-users.org> > Date: Tue, 16 Oct 2012 22:22:52 -0700 > To: Leica Users Group <lug at leica-users.org> > Subject: Re: [Leica] OT: large format lens vs. medium format lens > > the lens will cover the format.........and it is pretty modern, so it > should > be pretty sharp. > > The image circle of the 90 Nikkor SWD is 238mm. > The 6x17 format has a diagonal of 180mm. > > Back to the questions about film flatness.... and "floppiness" in the > camera... The SWC is exceptional in this regard..... > > What film "holder" are you using? > > Frank Filippone > Red735i at verizon.net > > > -----Original Message----- > From: lug-bounces+red735i=verizon.net at leica-users.org > [mailto:lug-bounces+red735i=verizon.net at leica-users.org] On Behalf Of > Richard Man > Sent: Tuesday, October 16, 2012 10:08 PM > To: Leica Users Group > Subject: Re: [Leica] OT: large format lens vs. medium format lens > > Mainly the Nikkor 90mm SWD, but I think the other lens are similar... > > On Tue, Oct 16, 2012 at 10:02 PM, Frank Filippone > <red735i at verizon.net>wrote: > >> Film flatness plays its part.... >> Your lens is trying to project an image circle equivalent to a 5x7 >> negative area....not an easy task.... >> >> What lens are you using? >> >> Frank Filippone >> Red735i at verizon.net >> >> Always been my understanding of it, not the same enlargement so not >> the same lens resolving. Newer LF lenses are much better than most old >> ones though.... >> >> john >> >> -----Original Message----- >> >> As Iwas formulating the question, it sounds like the answer IS >> obvious, but just want to confirm. >> >> I am testing the Shenhao 617 and it could be my focusing techniques >> and other issues, but it appears to me that the images are not as >> sharp on the same film as images made by, well, the Hassy SWC. >> >> Yes, I am expecting someone to jump in and say of course the SWC is >> razor sharp because it's the legendary Biogon etc., but I am now >> thinking that this generally will be the case, as the large format >> lens are designed to cover large negative (and the smallest 4x5 dwarfs >> the 617) so they do not generally have the resolution and sharpness >> that a good medium format lens has. >> >> Is this correct? >> >> -- >> // richard <http://www.richardmanphoto.com> >> >> >> _______________________________________________ >> Leica Users Group. >> See http://leica-users.org/mailman/listinfo/lug for more information >> >> >> _______________________________________________ >> Leica Users Group. >> See http://leica-users.org/mailman/listinfo/lug for more information >> > > > > -- > // richard <http://www.richardmanphoto.com> > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information