Back in the early 70's my first camera was a Pentax Spotmatic. When everyone else was shooting at 1/1000 & f5.6 @ ISO 100, I had to shoot at 1/1000 @ f4 with the same film speed. It really irritated me at the time and I finally upgraded. Just my $0.11 worth. -Bill >>> elgenper@telia.com 9:03:33 AM Thursday, May 01, 2003 >>> In theory, no... and yes... ;-) Aside from variations in manufacture or camera calibration, lenses do differ in actual light transmission. With today s glasses and coatings, the differences are far smaller than they used to be, and for "non-extreme" lenses like those three you mention, they *should* be quite small indeed. In practice, I would be surprised if three different cameras did indeed read the same without extra calibration - even if they used the same lens... Per torsdagen den 1 maj 2003 kl 14.53 skrev Charles Dias: > Hi, > > Another question a friend asked me and I couldn t answer perfectly. > Imagine you placed three cameras of the same brand and model side by > side, loaded with the same film and with the same function > adjustments. It are pointed to the same 18% gray panel and the spot > light meter are set. One of the cameras have a 20mm f2.8, other a 35mm > f2.8 and the last a 135mm f2.8. > If you set f5.6 in all lenses, will the light meters of the cameras > indicate the same speed for all three cameras??? > I asked him that it problably would indicate different speeds, in the > limite of +/- 1 EV, because the lenses have different optical > construction (different kinds, number and arrangement of optical > elements), but I m not sure about this. > Is my conclusion right??? > > > T+ > > Charles > > "It s no better to be safe than sorry" > In "Take on Me" song by A-Ha > > > > > _________________________________________________________________ > Add photos to your e-mail with MSN 8. Get 2 months FREE*. > http://join.msn.com/?page=features/featuredemail >
