Just want to get some opinions. During the launching party of the new PhaseOne body, I was faced with a choice to buy either P30+ or P25+ along with the PhaseOne body. After some long consultation, I chose the P25+ based on the advise of the PhaseOne distributor in my country. At that time, I was shooting more still life shoot as compared to people. Now, more and more, my work involving family portrait, portraiture, children and such. The problem that I am having is I noticed that are a lot of my shoot exhibit moire on the peoples clothing. I tried cleaning it using the moire function in Capture One, and the result is not satisfying. Sometimes, I can not get rid of the moire at all. If I am not mistaken, I've read from this forum, it has something to do with large sensor with not enough megapixels which caused the moire. What should I do?
The size of the pixel on the chip is the major factor here.
P25+: 9 micron
P30+/P45+: 6.8 micron
P65+/P40+: 6 micron
EVERY system in the world (including your eye) can moire. However, dSLRs use an AA filter which softens every image captured in order to avoid occasional moire. Backs with smaller pixels are significantly less prone to moire. A P30 CAN moire, but its much less likely; a P40 even less still.
Here are a few varied suggestions:
- Shoot tethered and use Capture One 4's floating "Viewer" at 100% on a 2nd monitor to get a quick idea if there is any moire
- When you see a "o crap" outfit switch to a Canon/Nikon with an AA filter. Either one can fit into your existing Capture One workflow
- Shoot either wider open, or more stopped down than usual. Moire will occur most at the middle apertures where DOF is high and sharpness is maxed. Wider open there is less DOF and therefore less fabric in focus and therefore less chance of moire - as well nearly every lens is a bit soft wide open. Stopped down diffraction kicks in and has an effect very similar to an AA filter.
The P25+ is simply not the right tool for family portraits. The P30+ or P40+ will very rarely moire and will give you faster shot-to-shot times for more spontaneity. Of course you already have the P25+ and I'm sure you didn't know where life would take you, so I sympathize with your frustration. Hope some of the above helps.
Doug Peterson
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Phase One, Leaf, Canon, Apple, Profoto, Eizo & More
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