Xbot

I still don't think it's front focused.  I just don't see the apparent differences in rocks that would show this. I still think it's much more likely that it's 1) camera shake/motion blur, or 2) ...

Personally, I don't think it looks front focuses. I don't really see much difference in the apparent sharpness from the feathers on the bird's neck and the rock at it's feet. And looking to the ...

"Field curvature is minimal"--from Opticallimits test of the 12-100: https://www.opticallimits.com/m43/1006_olympus12100f4pro?start=1

This has not been my experience at all. I realize there is sample variation in lenses, but my 12-100 is great. I've had both the 12-60 and 14-150 (Oly II, not I) and while those two lenses are ...

This may be true, but in real world use my copy of the 12-100 gives fantastic results across the frame at the long end.  I think the important point is that comparatively --compared to other ...

I had the E-M1 III before OM-1. As others have said, the E-M1 III is a great camera, but I wouldn't go back to it. For me, the EVF is a huge improvement. After using a higher res EVF in the A7RIV I ...

A few years ago I had the X-T2 and 18-55 lens. I've been using m43 for a couple of years now and have the OM-1 with 12-100mm. It will satisfy each of your bullet points. It's a stellar lens. Note ...

I just tried to go to camerasize.com and got a warning about it being unsecure.  Tried it on two different computers. Anyone else unable to get to it?

This may not apply to you, or you may have already tried, but since you mentioned a filter it's worth trying lens without the filter to see if it makes a difference.  I've occasionally  had ...

Quick update: Olympus just announced that they’re working on a firmware update to fix the freezing issue. https://www.43rumors.com/om-digital-announced-it-will-soon-release-a-new-om-1-firmware-upda ...

I'm not sure if we're talking past each other?  My original post about this which you quoted explicitly said "some filters."  Nobody is blaming all filters. Given my actual experience and the ...

”some filters” [not all] can do it   I had it happen on a Fuji 100-400 a few years ago.   One of my UV filters was awful.  The other fine on it.

This is good advice too.  I'd forgotten but a few years ago I put a UV filter on a long telephoto zoom lens.  I thought the zoom lens was awful.  I've regularly used filters before so I didn't at ...

Heat might not of been the best word. It’s really temperature differential. It can happen in cold weather when the sun is out as it warms up air and air starts moving.  Even if the air stays cold ...

This looks like heat/convection shimmer to me.  You'd be surprised how much that can affect photos when shooting long telephotos.  In other words, my hunch is it's the environmental conditions ...

As others have said (and it looks like you've figured out) this only seems to happen when 1) high EVF refresh rate is selected with 2) the 12-100 in 3) very low light conditions. While it may ...

Like you, I have both the 14-150 ii and 12-100. I hardly ever use the 14-150 because optically the 12-100 is just so much better. Even cropping the 12-100 to 150mm gives at least as good if not a ...

I have and shoot both Sony FF (A7RIV) and M43 (OM-1 now, but have had E-M5 III and E-M5, E-M5 II, and E-M5 III in the past). For the use cases you describe I would without hesitation choose M43.  ...

Thanks for that link.  On the one hand that does look like it could be the problem. On the other hand, I tried the solution and it didn't work.  So, I'm not sure--maybe it's something else?

I'm an experienced Lightroom Classic user, although I'm by no means an expert.  Something happened yesterday while editing some photos, and I'm not sure what it was. To help explain my problem, ...