Bob Andersson Posted October 22, 2009 Share #1 Posted October 22, 2009 Advertisement (gone after registration) From the M9 Amateur Photographer review thread: They did comment on how seemingly and quickly the sensor attracted noticable dust. I would like to assume they took the usual prudent precautions. It does raise the dust problem however for ALL digital cameras, ... It seems like you'd have to have some kind of door with interlocks that didn't open until the lens was mounted... I'm in the unfortunate position of not yet having the luxury of an M camera so please forgive what may be an ignorant question but why didn't Leica design the shutter to close when a lens is removed? There'd presumably have to be some sort of time limit before it opened again (on the assumption that there's associated battery drain while it's closed) but it doesn't take long to change a lens. OK, dust still gets into the body but it doesn't get directly onto the sensor which might be a help and with a strategically placed sticky pad or two (as used in some DSLRs) the dust that flies off the shutter as it reopens may even get caught before it finds its way onto the sensor. If the lens coding sensor could do double duty as a "lens present" sensor it would seem that all the hardware is already in place (except for the "stickies") which has to be good news for Leica's bottom line. But hey, as I say, I'm on the outside looking wistfully in so I assume that if this was easy or worthwhile Leica would have done it. Any thoughts? Bob. Link to post Share on other sites More sharing options...
Advertisement Posted October 22, 2009 Posted October 22, 2009 Hi Bob Andersson, Take a look here Dust and the M9 shutter. I'm sure you'll find what you were looking for!
stunsworth Posted October 22, 2009 Share #2 Posted October 22, 2009 I'm in the unfortunate position of not yet having the luxury of an M camera so please forgive what may be an ignorant question but why didn't Leica design the shutter to close when a lens is removed? They did. The shutter only opens when the shutter release button is pressed. Link to post Share on other sites More sharing options...
Bob Andersson Posted October 22, 2009 Author Share #3 Posted October 22, 2009 . Oops. Sorry, folks. I got the wrong impression from some of the posts I was reading. Thanks for putting me straight - more reading and more care needed on my part. Bob. Link to post Share on other sites More sharing options...
michael_b_elmer Posted October 22, 2009 Share #4 Posted October 22, 2009 I'm in the unfortunate position of not yet having the luxury of an M camera so please forgive what may be an ignorant question but why didn't Leica design the shutter to close when a lens is removed? Hi Bob, I do understand why you ask the question. The sensor used in point and shoot cameras normally give you live view, and the shutter in such a camera is, in fact, a shutter. On such cameras, the lens is normally not exchangeable, and the risk of dust on the sensor is negligeable. In quality cameras with big format sensors, the sensor technology is different, and the sensor does not provide live view. In fact, on these cameras, the term 'shutter' is somewhat misleading, since light is never allowed to be passed on to the sensor (or film), except when the button is pressed in order to open the "curtains". The term 'shutter' must originate from the time of the Daguerreotypie where the photographic plates were very little sensitive to light and had to be exposed to light for minutes, hours, or days in order to produce a picture, and where putting on the lens cap (or another mechanism) shut out the light. So, in this respect, Leicas are not different from other cameras with big sensors and exchangeable lenses. Link to post Share on other sites More sharing options...
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