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 is apparently one of the advantages of the Foveon sensor, the noise is also reduced by the addition of the three sensor layers in the CPU. I'm very much looking forward to reading the first tests, though I must admit, a digital zoom is not quite my cup of tea. Douglas Nathan Wajsman wrote: > 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 > > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information >