Well, not quite. Since most modern cameras measure the light and dertermins the proper exposure value at open aperture, the lens/camera has to calculate how much light will go throug, when the aperture is in fact closed down to working aperture (what has ben set on lens or onthe camera). For this purpose there are machanical or electronic divices, that can get out of proper adjustment. I have exprienced this to happen with a SMC A 1.4/50mm. I managed to correct this (to a practically usable tolerance) by loosening, moving and re-tighten metal ring inside the lens. I'm npot quite sure how it works, but at least I found out, that a faultly lens CAN in fact cause faulty exposure - even if the aperure closes down properly.
I don't know if this has any relevance for the 16-45mm - but it still proves a point, doesn't it? Jens Bladt mailto:[EMAIL PROTECTED] http://hjem.get2net.dk/bladt -----Oprindelig meddelelse----- Fra: Tim [mailto:[EMAIL PROTECTED] Sendt: 26. oktober 2004 18:07 Til: Pentax Discussion List Emne: Re: Which wide angle zoom for the *ist D? Could it could be an issue with the aperture being too slow/fast or slightly smaller/larger than it should? t On 10/26/04 1:28, Shel Belinkoff wrote: > Hi, > > I don't get it. How can a lens make a photograph too dark or cause over > exposure problems? Exposure is a function of the metering., is it not? > > Shel > > >> [Original Message] >> From: Sam Jost <[EMAIL PROTECTED]> > > >> Strange, I remember finding pictures from the 16-45 rather dark, and in a >> german user forum there had been lots of lengthy discussions and pictures >> about the 16-45 making too dark pictures. > > >> ----- Original Message ----- >> From: "Jens Bladt" <[EMAIL PROTECTED]> > >>> Funny how thers overxposure with the 16-45mm. In fact it might be a wide >>> angle problem. I often get overexposed images with my A2.8/20mm - on > film > > > >
