John,
I say ixnay the digital back concept...
It's unlikely that Leica has enough money to recast an R body into digital form (their financial situation is precarious). The R digital back is being developed by Imacon and Kodak who, I'm sure, will shoulder the financial burden. In short, clever branding by Leica lets them conserve cash.
Leica's approach isn't compelling economically to the user, and makes no sense ergonomically. Contax can afford to underwrite a digital C/Y body with battery, sensor and electronics compactly housed. Those components comprise the major cost of a DSLR or digital back. Yes, you pay for another body, but it's just a metal envelop and, unlike the Leica approach, there is no space wasted for vestigial film storage and transport mechanism. (That R film advance lever is a riot!)
About sensor crops...
Between the incident-angle problem and sensor cost, I could imagine Contax imposing a crop factor. For wide-angle fiends like me, this obviously hurts. But it hurts tele users, too, because we then carry the size and weight of 135-class optics without enjoying the full image circle. Plus, CZ glass is too good to crop!
A smaller sensor makes ergonomic sense if the camera and lens image circle are reduced proportionately. Oly has the right idea with the 4/3 system (e.g. 300/2.8). Nikon is clearly trying to compete with the surprisingly light D2H and new DX lenses. Owners of old Nikon lenses are left lugging their underutilized glass. Are we C/Y users trapped on Nikon's Highway to Hell? (You can see I don't like APS-sized sensors!)
BTW, I started my C/Y system to get away from wide-angle trauma courtesy the D30 - talk about regression!
I say ixnay the digital back concept...
It's unlikely that Leica has enough money to recast an R body into digital form (their financial situation is precarious). The R digital back is being developed by Imacon and Kodak who, I'm sure, will shoulder the financial burden. In short, clever branding by Leica lets them conserve cash.
Leica's approach isn't compelling economically to the user, and makes no sense ergonomically. Contax can afford to underwrite a digital C/Y body with battery, sensor and electronics compactly housed. Those components comprise the major cost of a DSLR or digital back. Yes, you pay for another body, but it's just a metal envelop and, unlike the Leica approach, there is no space wasted for vestigial film storage and transport mechanism. (That R film advance lever is a riot!)
About sensor crops...
Between the incident-angle problem and sensor cost, I could imagine Contax imposing a crop factor. For wide-angle fiends like me, this obviously hurts. But it hurts tele users, too, because we then carry the size and weight of 135-class optics without enjoying the full image circle. Plus, CZ glass is too good to crop!
A smaller sensor makes ergonomic sense if the camera and lens image circle are reduced proportionately. Oly has the right idea with the 4/3 system (e.g. 300/2.8). Nikon is clearly trying to compete with the surprisingly light D2H and new DX lenses. Owners of old Nikon lenses are left lugging their underutilized glass. Are we C/Y users trapped on Nikon's Highway to Hell? (You can see I don't like APS-sized sensors!)
BTW, I started my C/Y system to get away from wide-angle trauma courtesy the D30 - talk about regression!