Followup: 25mm is FRONT FOCUSING on G7 (examples)

Big D in SP wrote:

JConrad wrote:

My 25/1.7 also front focuses, most notably at infinity. Closer up it seems fine (though it has more problems on the GX8 than on my E-M10 II). Near infinity, it almost always front focuses a fair bit, causing softness even stopped down.

Landscape shots were one of the first to suggest to me that the softness of indoor shots was something more than poor resolution and why I tested the focusing accuracy.

It's interesting that the lens seemingly focuses better on the EM-10 II than the GX8. Why, I wonder, would that be?

Warren

One thought that occurred to me was that it might have something to do with DFD. Focus distance lookup table not quite matching the actual behavior of the lens?

robjan245 wrote:

I had the same issue with my G7 with the 14-140 lens. I ended up returning the G7 for the Sony A6000.

I have the same issue with my GM1 mounted with the 14-140 II. Focus seems fine in most focal lengths except at the tele end.

I at first thought it's just my technic and not know this lens enough but after reading similar issues with different lenses at their tele ends, I might have to keep this in mind when shooting at tele ends.

I see that back in May 2018 there was a firmware update for several cameras and lenses - including the 25mm f/1.7 - model H-H025

http://av.jpn.support.panasonic.com/support/global/cs/dsc/download/fts/index2.html

Perhaps not the solution - they say it's purpose is... "Improved focusing stability when using the Lens Position Resume function." ... but thought I'd give a try tomorrow.

Peter

I also have been thinking, this would not happen in mirrorless camera, but obviously it does.

https://www.dpreview.com/forums/post/61068247

Here the OP seems to refer to 2 other samples of the A7iii.

Peter