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 p.1 #14 · Re: MF digital backs. The dilemma | |
Guy Mancuso wrote:
First let's say you went the hassy or contax route and bought a P25 or even the P45 not leaving Leaf out of this but will just talk one system for easy understanding. It seems to me that the lenses here in 21/4 are the issue that they can't simple resolve what the sensor is putting out , okay there maybe one or two but maybe all you are getting out of them is like 18 mpx of resoultion , I picked a number here but seems in this area you may be better off with the DMR or the Canon 1dsMKII because the difference while there may not be worth the cost or
convenince of the DSLR.
If you "pick" 18mp that might be the conclusion, but quite frankly one should have better information than just arbitrarily picking a number that might bias your answer. What if we "pick" the actual resolution to be about 22mp? Would that plus the enhanced dynamic range make the decision for the P25? Perhaps, it depends on what you are doing.
Guy Mancuso wrote:
Now hear is the rub that is maybe 25k and can i justify this extra system in my work. It's intereting that from what i have gathered in my research is the p25 on a Contax is only slightly better than my DMR. First it is the Leica glass which is probably much better than the Contax MF glass and also the DMR is a Mini MF back.
"MUCH better"? Probably not. What's your criteria? The Contax 645 lenses resolve as well as most 35mm lenses. The Leica lenses over a 35mm patch might be a "little" better (but the 24x36mm center of the image circle of the 645 lenses is d*mn good too). But add in larger imaging area of the MF back would clearly (the way I see it) give you significantly better resolution with the Contax 645 lenses and a P25.
As for Michael Reichmann (since he was brought up), I'm not sure there is anyone on the web more catptured by sponsorship interest (except perhaps Bob Atkins). So there are certain things from him that I take with a grain of salt. His shifting opinons on this issue (raised by other posts in this thread) is evidence to me. Perhaps the Contax with a P25 is seen as competition for the 1Ds MKll (that is why we are having this conversation here, isn't it?).
Quite frankly, I would like to see for myself, or have some reliable, objective, properly-designed tests done to to illuminate this issue more clearly. The new Digitar lenses and a P45 may indeed knock off a Contax 645 and back. But as with the comparision between the 1Ds MKll and the C645, there is a tradeoff between convenience and quality.
I should point out that these comparisions are nothing new. The same sorts of issues werediscussed with film, and the answer always is, pick that works best for the combination of subject, situation and desired output. The comparision with digital might be a little tighter than with film, but it is the same calculus.
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