Archived posting to the Leica Users Group, 2003/06/25
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Jerry Lehrer wrote: > Austin > > Does that presuppose that the R8/9 shutter has to be locked > open when the digital back is in place, and the hardware of the > sensor support protrudes forward of the focal plane? > > Jerry Why don't you guys just go to Leica's site and watch/listen to the news conference where all these questions (and more) were answered in detail. And no, the shutter is not locked open. And no, there is no anti-aliasing filter. Sheesh. Rolfe > Austin Franklin wrote: > > >>Hi Adam, >> >> >>>On 2003-06-25 darkroom@ix.netcom.com (Austin Franklin) >>>thoughtfully wrote: >> >>I'd like to think of it that way ;-) >> >> >>>>I don't believe there will every be a full frame "back" for the >>> >>>R8/9. There >>> >>>>are physical limitations that make this not possible. >>>> >>> >>>Could you explain for us what those are Austin? Does it have to >>>do with the >>>actual dimensions of the chip and its support circuitry? >> >>The physical sensor is one issue, and it has to fit at A particular >>spot...AT the film plane. Not before, not after... The sensors have a lot >>in front of and around them, Bayer pattern color filters, anti-aliasing >>filters and an IR filter. This adds depth/thickness/width/height needed in >>front of and around the sensor...and therefore the film gate has to be deep >>enough, and wide/tall enough to support all this. >> >>The reason a reduced size sensor works is it fits IN the film gate. A full >>frame sensor would most likely not. I think there is money to be made by a >>savvy sensor manufacturer who makes a sensor that maximizes the available >>area within the film gate...but they all seem to fall "short". The sensor >>used in the R digital back is basically a half frame sensor! It's only >>17.6mm x 26.4mm...I believe. It's 456 sq mm, and 35mm film provides 864 sq >>mm. >> >>Regards, >> >>Austin >> >>-- >>To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html > > > -- > To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html - -- Rolfe Tessem | Lucky Duck Productions, Inc. rolfe@ldp.com | 96 Morton Street (212) 463-0029 | New York, Ny 10014 - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html