I've shot a few hundred frames with the M9, and have been surprised that I haven't seen any examples of moire or any intrusive artifacts. On a few occasions very fine, high contrast details have been rendered on the camera's viewing screen as blue/yellow lines, but in each case this disappeared once the shot was opened with Lightroom 2.5 or Camera Raw 5.5.

However, I've just found a couple of examples that are proving more persistent.

Look at the fine detail of the crane (shown here at 100% with only default Camera Raw processing), any thoughts on what it is, and how to deal with it? I've tried de-fringing and the blue/yellow sliders, but without success. This was handheld at 1/500s, ISO 160, and is a detail close to the axis taken with a Zeiss 35mm 2.8 at f5.6. Incidentally, this series of shots is the ONLY persistent example of this problem that I've found so far in about three hundred M9 frames, taken handheld and tripod mounted, with ISO's from 160 to 2,500, and using both some of the stellar new lenses of the Leica range as well as a couple of old favourites. If this is as bad as the M9 moire issue gets, then I guess I can live with it.

Click to view attachment

My apologies, the 100% crop was posted twice and I'm unsure how to remove one of them.

Here's another example where the above shot was recomposed, so that the crane was now moved well towards a corner, all other shooting details were the same. The fall off in resolution seems to have reduced the problem, but not cured it.

Click to view attachment

The only foolproof solution I've found is to work in black and white :-)

But seriously, the M9 has moire. Lots of people are seeing it. I spotted it in a could of a friends' shots the other day, specifically in blue jeans. Desaturating certain channels in a careful photoshop selection may be the only answer in many cases, and that may not work on certain subjects.

As a shorcut, have you tried a very small brush, used at 200% in Lightroom with a high de-saturation setting?

- N.