Joe500

Good advice Jorge; thanks for your thoughts - and best wishes for the big print plans!

Thanks andrei89. I suppose, when I said "modest"jump, I was thinking of the slight jump from 24mp to 26mp, after I'd previously decided to wait for a higher res sensor than in the X-T20 or the X-T2. Interesting about the Canon camera, although already use the Sony RX10 Mk4 as well as Fujifilm X-T10, and don't want to go to yet another make.

My primary interest is landscape with lots of detail and having the option to print large. Initially I looked at settling on one sharp compact prime wide angle lens for Sony FE (like the Zeiss Loxia 21mm or 25mm, with dedicated manual focusing on full frame camera), with enough resolution to crop moderately if necessary for framing, or to extend the versatility a little of the fixed focal length - certainly not cropping a lot or all the time. Other features of the camera would be subsidiary, as it's mainly still imagery with a tripod, not action or video or extended focal lengths. I then looked at an ultra-wide to medium-wide zoom as another option, being more versatile, which is where I realized I wanted the same characteristic as the Fujinon XF 10-24mm on APS-C, i.e. the Sony FE 16-35mm f.4. That's a heavy and bulky lens, which brings me back to retaining the Fuji 10-24mm and wishing for a higher res.sensor on APS-C.

I'd considered upgrading from my two 16mp XT-10s to the 26mp TX4 but wonder if the modest jump in pixel count is worth it - realizing that it's area and not linear. After all the Sony A7R4 has gone to 61mp which, even cropped to APS-C, is still over 27mp by my estimate. I love the Fuji X f.4 10-24mm and would hate to have to go the equivalent weighty monster in a 35mm mirrorless system. Is there any chance that Fujifilm might have a sensor (for a TX5/XT-4?) in the pipeline which is in the region of 30-35mp. I would upgrade for that! Rereading my draft I think I might have answered my own question - 26mp on APS-C is close to the density of 60mp on full-frame, so is it current state of thee art?