Maybe I'll keep that zoom lens after all...

 I overlooked a couple things when testing that vintage telephoto lens from my last post.  

1) The included extension tubes!  

2) My micro four thirds camera!  

The huge working distance for this lens and the 1:5 reproduction ratio was a disadvantage for me.  Extension tubes address that, somewhat.  I don't think I would use this lens as a telephoto -- if I use it, it'll be for macro.  So the loss of infinity focus isn't an issue here. 

And a micro four thirds camera "doubles" focal length of full-frame lenses.  So the 80-200mm becomes a 160-400mm.  That's pretty close to my Fujinon 100-400mm (which is more like 150-600 full frame equivalent on my crop sensor X-T4). 

Here's the sandwich.  Lens, extension tube, M42 to MFT adapter, Olympus camera: 

I think this is still less weight than the X-T4's body.  (Probably not). 

I actually had a lot of fun with adapting this to my OM-D EM-10 MK II (yeah, that's a long name -- let's just say Olympus camera) and using the shortest extension tube.  The minimum focus distance was still pretty long, and working distance at 200mm was more than I thought it would be.  

Finding focus is much harder though.  The very short distance that is in focus is difficult to find quickly, at least for me right now.  I should probably make myself a chart for how the extension tube modifies minimum and maximum focus distances for 80 v 200mm.  

This one is straight from the Olympus:

These next two have been cropped and slightly color corrected: 

It was very windy and I was losing the light, so these are pretty much the only in focus and decent shots I got.  But I see the potential of this lens now!