Archived posting to the Leica Users Group, 2007/06/07
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]That was exactly my point. I am sure the Sigma sensor is better than the GRD's, since it is so much bigger. But let's say that I am shooting in a situation where I need to set the GRD at f2.4 and ISO 400 to obtain a handholdable shutter speed. With the Sigma, I would need to set an ISO of 1000 in the same conditions because the lens is 1 1/3 slower. So the relevant question for me is whether the Sigma sensor at 1000 is better than the Ricoh sensor at 400. And that is not guaranteed. And besides, I already have the Ricoh, while the Sigma is vaporware at this point :-) On 7-jun-2007, at 16:33, Rei Shinozuka wrote: > seems interesting, but why is the lens so darned slow? > > -rei > > On Jun06 22:27, mehrdad wrote: >> nathan did u also look @ the sensor size difference between the grd >> and dp-1? the dp-1 is APS size and very capable @ shooting high >> iso if >> it is the same as sigma's latest sd-14 camera. people are compering >> the results of the sd-14 with the canon 5d. >> >> On 6/6/07, Nathan Wajsman <nathan@nathanfoto.com> wrote: >>> I printed out the PDF from the web site and drooled all over it >>> until I >>> realized that there is a fly in the ointment: the slow (f4) lens. >>> Compared to my Ricoh GRD's f2.4 lens, this means that the Sigma >>> is about >>> 1 1/3 stops slower. Or put in another way: if I am in a situation >>> where >>> I need to use the Ricoh wide open at ISO 400 (the highest usable >>> ISO on >>> the GRD in my opinion), I would need to set the Sigma to ISO 1000 >>> in the >>> same situation. So while I am sure that the Sigma's sensor is >>> superior >>> to the Ricoh's at the same ISO, that is not the relevant >>> comparison for >>> me. The Sigma at ISO 1000 would need to be superior to the Ricoh >>> at ISO >>> 400. I think I'll wait for some reviews... >>> >>> Nathan >>> >>> Douglas Sharp wrote: >>>> The photographic magazines in Germany have it priced at 700 Euros - >>>> not cheap for a P&S - but I think I want one anyway :-) >>>> Douglas >>>> >>>> Jeffery Smith wrote: >>>>> Some of us are waiting on the Sigma DP1. Sigma has given it its >>>>> own web >>>>> site: >>>>> >>>>> http://www.sigma-dp1.com/ >>>>> >>>>> but so far it hasn't been released. >>>>> >>>>> Jeffery >>>>> > > > -- > Rei Shinozuka shino@panix.com > Ridgewood, New Jersey > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information > Nathan Wajsman nathan@nathanfoto.com General photography: http://www.nathanfoto.com http://www.greatpix.eu http://www.frozenlight.eu Picture-A-Week: http://www.fotocycle.dk/paws Blog: http://www.fotocycle.dk/blog