seems to me that aligning a glass flat parallel to a sensor would be child's play via a spacer. I think that this technique would be good in a rangefinder camera but not in a SLR because in order to get the dust out of the focal plane it would need to be too far away from the sensor and would interfere with the mirror travel. JCO
-----Original Message----- From: Herb Chong [mailto:[EMAIL PROTECTED] Sent: Saturday, January 08, 2005 7:43 AM To: [email protected] Subject: Re: Why didn't Pentax.... Kodak did that once. they stopped. i believe that it is too hard to get and keep aligned. Herb.... ----- Original Message ----- From: "Steve Jolly" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Saturday, January 08, 2005 5:33 AM Subject: Re: Why didn't Pentax.... > Thinking about it, dust on the semi-silvered mirror would be far less > of a problem than dust on the sensor for the same reason that dusty > lenses are rarely something to get worked up about - the dust isn't at > the focal plane. Which makes me wonder if DSLR manufacturers couldn't > all-but-eliminate the problem of sensor dust by putting in a piece of > flat multi-coated glass (maybe even ED glass) between the mirror and > the sensor's anti-aliasing filter. You could even make it as easy to > change as a focussing screen. :-)
