02-04-2012, 07:32 AM
[quote name='photonius' timestamp='1328130287' post='15388']
Yes, I figured you are busy... :-)
Anyway, re: first part, I think you misunderstood. Obviously, you can't take lens and sensor apart with a P&S, while you can with dSLR. But the system has a combined final output comprised of sensor and lens performance, and the RAW processing uses whatever version is available at that time (software changes over time, can't be avoided).
So, something like this should be possible: take a picture with P&S camera X at 18mm, with P&S camera Y at 18mm, and say a Canon 50D with 18-55 IS at 18mm. Then enlarge them all to same size, say 50cm, and measure "sharpness". Of course you want the last steps all done in software - I suspect the current types of testing software only work with one particular sensor at a time, and can't deal with the second part, i.e. equalize all images (adjust mps) and measure on that??
[/quote]
Well, it wouldn't be totally comparable because there's always a camera profile involved in the RAW conversion (which could favor one camera over the other) but it may be "valid enough" to test the system performance this way.
However, we have basically no relationship with the manufacturers and we would certainly not buy a P&S camera just for testing the lens. A community supplier (in time) seems unlikely IMHO.
Yes, I figured you are busy... :-)
Anyway, re: first part, I think you misunderstood. Obviously, you can't take lens and sensor apart with a P&S, while you can with dSLR. But the system has a combined final output comprised of sensor and lens performance, and the RAW processing uses whatever version is available at that time (software changes over time, can't be avoided).
So, something like this should be possible: take a picture with P&S camera X at 18mm, with P&S camera Y at 18mm, and say a Canon 50D with 18-55 IS at 18mm. Then enlarge them all to same size, say 50cm, and measure "sharpness". Of course you want the last steps all done in software - I suspect the current types of testing software only work with one particular sensor at a time, and can't deal with the second part, i.e. equalize all images (adjust mps) and measure on that??
[/quote]
Well, it wouldn't be totally comparable because there's always a camera profile involved in the RAW conversion (which could favor one camera over the other) but it may be "valid enough" to test the system performance this way.
However, we have basically no relationship with the manufacturers and we would certainly not buy a P&S camera just for testing the lens. A community supplier (in time) seems unlikely IMHO.