a smaller focussing screen will NOT be dimmer/ "fainter" just because its smaller. It would only become dimmer/"fainter" for a given lens speed if it is magnified more to match a larger screen visually. jco
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Dario Bonazza Sent: Friday, March 09, 2007 3:34 AM To: Pentax-Discuss Mail List Subject: Re: Sigma DP1 In this case, all else is NOT being held equal. FourThirds viewfinder is smaller and/or fainter due to smaller sensor size. Once again the faster lens just compensates for that handicap, no gain. Dario ----- Original Message ----- From: "J. C. O'Connell" <[EMAIL PROTECTED]> To: "'Pentax-Discuss Mail List'" <[email protected]> Sent: Friday, March 09, 2007 6:11 AM Subject: RE: Sigma DP1 > Even if all else is being held equal due to other factors, a faster > lens is still better than a slower lens in terms of viewfinder > brightness because your eyes > always have the same sensitivity even if the crappy 4/3 sensor doesnt... > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf > Of Boris Liberman > Sent: Friday, March 09, 2007 12:01 AM > To: Pentax-Discuss Mail List > Subject: Re: Sigma DP1 > > > I understand... > > However at minimal ISO the noise is about as good as regular APS > cameras, right? Then, for this case only, the f/2 zoom would be > beneficial, isn't it? > > Boris > > > Dario Bonazza wrote: >> Adam Maas wrote: >> >>> It's pretty simple. The 4/3rds cameras are noisy at moderate ISO's. >>> 400 on a 4/3rds body is as noisy as 800-1600 on a larger sensor. So >>> you > need >>> faster lenses to be able to shoot in the same light with similar > amounts >>> of noise. Thus the f2 zooms get you no real boost in speed, since > they >>> only make up for the lower ISO necessary due to the noisy sensor. >> >> My thought exactly. >> >> Dario >> > > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
