About over a year ago we checked out the Phase
One P25 back. This was a fine back but we did not find
a huge difference to the Canon 1Ds Mk. II in our brief test.
The new P45 back has 39MP (vs. 22MP of the P25) and this should make
a much bigger difference if all the other things are equal.
Thanks to our Bill Atkinson we could compare the P45 (Bill's
P45) and the Canon 1Ds Mk. II (our 1Ds Mk. II) at Bill's studio. We
a Hasselblad H1 and 120mm
Macro lens in a studio setup with flash. We hope to get at some
point a P45
for a longer evaluation in the field. Still we would like to share
Technical notes: All the images were developed in
Capture One and sharpened with our EasyS Plus Sharpening Toolkit. We
framed so that the horizontal scene had about the same width with both
Here are first results
P45 full frame
100% magnification (after mild EasyS sharpening)
Canon 1Ds Mk. II full frame
Crop at 100% magnification (after some sharpening)
Crop at 100% magnification after upsizing to the same width as the
The resolution difference is quite obvious.
This of course mainly matters if you print large.
As a unique service of Digital Outback
Photo we provide the original RAW files for your own personal evaluation
(you have no right to publish the results anywhere!). We also added
a shot taken with the Canon 5D. Capture One users should be able to
open the files. Mac users can also download a demo version of RAW
developer and open the P45 file.
RAW files from here (these files are really
huge - 14MB and 40MB).
For the next installment we plan to discuss
the topic: F-Stop, Refraction & Sharpening.