Another lesson learned

 I've heard it so often: "make sure your proposed system has the lenses you want before you buy in! ". 

Yet somehow I didn't take it to heart when the S5 called. The L mount is still expanding, and lenses will assuredly appear as appropriate. 

Oops.

Worse yet, very few mirrorless systems carry what I seek. Seek ye an 50-200mm in any 36x24 system that weighs under 800 grams. The answer is: μ43 and nothing else. The Lumix 35-100/2.8 is amazing - but larger systems all stop at f/4. Those are less bulky than their f/2.8 models but still not in my comfort zone. I'd prefer my old Minolta 70-210 /3.5-4.5 or 100-200/4.5, both under 500 grams and plenty bright enough for a 36x24 sensor. 

The nearest things are from Tamron, which means Sony E or Nikon Z. Since I actually own the Minolta 100-200, Sony sadly makes more sense. Both have tilt screens instead of flipout, so that's a positive. The α7³ has a BSI-tech sensor with two ISO channels and PDAF - both make it comparable to the S5.II and a slight improvement over the S5. Neither company has the aspect ratios or touchscreen features of the Lumix types though - ah well.

I've been here already with the mk II Alphas, but the mk.III has become available at my price. And so the mutations begin again - please God, let it end here.

For now a 28-60 and another la-ea4 adapter will suffice for both Minoltas (100-200 and 50 macro); as other gear sells, I'll look more deeply into lens options.