On 2/04/03 5:45 PM, "Bruce Rubenstein" <[EMAIL PROTECTED]> wrote:
> I'm not going to bother arguing with a gadget freak fool. > Go here: A Virtual Tour of the Lens Production > http://www.zeiss.de/de/photo/home_e.nsf/Inhalt-FrameDHTML/4FDEACEDCB7D0AF54125 > 6A53003923AA > and come back when you know something. Bruce, there are far better description even in a humble in Canon site (and others) about the lens production and testing and a whole bit. And if you are really interested in understanding the lens performance, there a few reputable shareware software for amateur hobbyists with which you can experiment the lens design yourself. Just like you are not an optical engineer, I do not pretend I am. It is a shame to do so. This is not a pissing contest, and I do not want to litter this list with the amateur opinions by you and me. But I do have one point which bothers me. Nobody is arguing about the optical alignment, although your posting may look like so. But the underlying truth is you are really talking about the engineering approach and the methodology, but you do not realize it. What you are really saying is that the lens shift gimmick is making the lens system prone to the shift because of its cycling (in your opinion, as low as 1,000 cycles). If the lens retracting mechanism is not well designed, and if the lens misalignment occurs, that's the design failure. And you are suggesting that that the Pentax lens positioning gimmick will make the lens alignment prone to the shift. That's why you are arguing about the mechanical concern rather than the optical misalignment. That's the engineering answer. If you do not understand this simple fact, well, sorry, you do not know what you are contending. But forget about all the engineering argument. It is futile with you. If engineers look at your original post, they see thru the crux of the matter which is not the lens alignment, but the mechanical cycle to "cause" the possible misalignment. If the ordinary PDMLers looked at your post, they think you are making a sarcastic remark on Pentax's achievement. That's all. No big deal. So much on this. Sleep well, Ken Oh, BTW, I am sure you know that even Zeiss lenses, there are many cull you can find just by shining a laser pointer beam. You will find some of the lenses or groups misaligned. I agree that the smaller the lenses are, the less tolerant they are for the misalignment. But as I said, it was not really your contention. Read your own post.
