Archived posting to the Leica Users Group, 2008/03/25
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Akhil, The 4.5 is somewhat superior even at f8 out to the edges; look especially at the disconnected curve for the 2.8 with the sagital changing radically. Plus, it is smaller, costs less, and has less distortion. Usually, when you are using a lens this wide shutter speed is not a big problem with a rangefinder camera so you will be shooting at F4 down anyway. With a rangefinder I will typically set the lens at F5.6 and set a hyperfocal for infinity down to 4 feet or so. Truly a P&S at that point. On Tue, Mar 25, 2008 at 1:24 PM, Akhil Lal <alal@duke.poly.edu> wrote: > Interesting comment on the 21/45 vs. 2.8. I had been thinking of getting > the 2.8 until I saw your post. > > Just curious, other than distortion, what can the 21/4.5 do that the 2.8 > cannot do equally well at the same aperture? The MTF curves, at 5.6 look > very good for both lenses. > > > On Tue, 25 Mar 2008, Don Dory wrote: > > > Clayton, > > The 21 4.5 has been in the works for three or so years as I have played > with > > prototypes for that long. It reason for existence is smaller size, > better > > performance especially at the edges, and some nostalgia for the original > > groundbreaking 21 Biogon. For almost all users of a 21 the 4.5 is a > better > > choice; only those who need limited DOF or who have to have a 2.5 stop > > faster lens will opt for the 2.8 version. > > > > On Mon, Mar 24, 2008 at 10:05 AM, R. Clayton McKee <leica@rcmckee.com> > > wrote: > > > >> Quoth the Jeffery Smith : > >> > >>> Looks like a new 35/2.8 Biogon is going to be making its way into > >>> the market. I think I have enough slow 35mm lenses. > >> > >> > >> There's a 21/4.5 in the lineup now, too. I suspect that with the > >> Summarits and the weak dollar (!), Zeiss is thinking that there might > >> be a significant market for a slower and less expensive line, > >> especially as the low-light performance of digicams continues to > >> improve. The 35/2 is nudging the 4-figure mark at B&H now; a > >> smaller, lighter 2.8 will probably do well at 700, 750, somewhere in > >> there. It's a step up from the Ultron and competing with the Summarit > >> at a huge price cut. > >> > >> The target market here is the new RF fans, NOT the folks who're still > >> buying glass for their one-owner IIIf's and M3 DS models.... > >> > >> > >> > >> > >> _______________________________________________ > >> Leica Users Group. > >> See http://leica-users.org/mailman/listinfo/lug for more information > >> > > > > > > > > -- > > Don > > don.dory@gmail.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 > -- Don don.dory@gmail.com