----- Original Message ----- From: "Peter Loveday" Subject: Re: Some random thoughts on my K10D
>>> * The MTF programme line still refuses to use all apertures on my >>> primes >>> (ie, no F1.4 on the FA50/1.4) >>> >> >> That's what MTF prog. should do. It is choosing the aperture based >> on >> what gives the better (i.e., sharper) result. The MTF value for F1.4 >> is low so the camera it is going to avoid this setting and stop the >> lens down for a sharper result. If you want the camera to include >> F1.4 then switch out of MTF based prog. > > I'm quite aware why and what it is trying to do, I just disagree with > the > decisions the camera makes (well, the engineers made) on this, > basically > that either: > > * ISO 1600 at F2 is better than ISO 800 at F1.4 on this lens > * 1/15 at F2 is better than 1/30 at F1.4 on this lens. (SR changes the > values here, but the principle remains the same) > > Either of which I think are wrong. Peter, you put the camera into an exposure mode that forces it to try to use the lens at it's "best" aperture, then complain that is what it does. Give yer head a shake, me boy. William Robb -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
