----- Original Message ----- From: <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Wednesday, April 02, 2003 2:20 PM Subject: Re: *ist D and FA J mounts
> > Hi Dario, > > > http://digilander.libero.it/aohc/pshw2003/monte.htm > > You have done a wonderful job of explaining the evolution of the K-mount > and voicing our (my) concerns about Pentax's recent introductions! > > Regarding the diaphragm actuator on the FAJ lenses. My gut feeling > tells me that it is fixed, and deflects the body's respective lever all > the way. Just like the mirror lenses, this indicates to the body that > the lens will not stop down during exposure. However the FAJ lenses DO > CLOSE during exposure, and this causes underexposure. > > Do note that this is only a speculation on my part. Although I am > convinced that this is the case, I might be wrong. > > Cheers, > Boz More speculation from me, the aperture simulator corresponds with the lens minimum aperture, in stead of full open. The only position which makes it usable (at least gives a valid exposure) with pre A camera's George
