Re: EF-M 55-200mm - Post your PHOTOS!
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I got this lens a few weeks ago to go with an M6-ii. At max zoom it's f/6.3, which corresponds to a 7.5µm diffraction disk, versus the 3µm pixel size of the M6-ii, so the combined system is diffraction-limited even wide open. This is mostly a bad thing, but it does have that advantage that bayer CA is never apparent, even viewed at 400%. To show the limits, the dragonflies in the photos below are 100% crops. The spider monkey too.
Another thing to bear in mind when this lens is paired with the M6-ii (no electronic first curtain shutter) is that mechanical shutter shock will usually blur the image on telephoto EF-M lenses at shutter speeds below 1/125 or so. This seems to be a system interaction between first shutter vibration and the IS gyros in these unusually small+light telephotos, made more apparent by a 32.5MP APS-C sensor. For outdoor shooting of slow-moving subjects the problem is easily addressed by using the full-electronic shutter, with the additional advantage of total silence.
The IS is rather good on this lens -- the orangutan shot was at 1/50 handheld, and the spider monkey at 1/80, and both show diffraction-limited detail -- but you won't know it with the M6-ii until you switch to electronic shutter. Before figuring this out, my first attempts to capture the orangutan were blurred at 1/60.
Post-processing notes: all done with darktable, lens correction on, sharpened only to deconvolve diffraction blur. White balance and exposure are manually tweaked, "filmic rgb" on and mostly at default settings, and with a dash of "velvia" on most of them (but none on the roseate spoonbill - the color there is as-shot except for "filmic"). And obviously, most of them are variously cropped. There's no adaptive CA correction on any of them, just the linear TCA cancellation in the lens correction. For comparison, with the fast EF-M primes, particularly the Canon 32mm and Sigma 56mm, it's easy to wind up with lots of bayer CA. Those lenses have airy disks around 2µm so they're not (at all) diffraction-limited on the M6-ii.
Note all exports are at 50% or 100%, and have full exif data FWIW.
spider monkey, Houston Zoo
roseate spoonbill, Houston Zoo
orangutan at the zoo
African painted dog at the zoo
Komodo dragon at the zoo
cheetah at the zoo
dragonfly at Houston Arboretum
dragonly at the arboretum
dragonfly at the zoo
pigeon at Hermann Park
bald eagle at the zoo
butterflies at HMNS
butterfly at HMNS
flowers at HMNS butterfly garden
flower at the arboretum