I only rarely use lenses much longer than 180mm, and I already had two R 180mm lenses, but in a moment of shopping therapy I saw a Telyt-R 250mm f/4 (3cam) that seemed very clean and at a very low price. I bought it; when it arrived, I tested it and was astonished just how nice it is. You mean later version are even better performers? Amazing.
Anyway, I thought I was done ... Much as a 400 and 500 mm lens is impressive and fun to use very occasionally, I will never use that long a lens enough to spend real money for one. The Soligor 600mm f/8 mirror lens I bought in Nikon mount is pretty mediocre but works and cost me just $95. Couldn't really need anything more.
But then a discussion of R teleconverters came up. Piqued my curiosity ... I did an Ebay search and found 2x APO-Extender-R selling in the $350-$800 range (much more than I was willing to spend) and 2x Extender-R selling in the $150 plus or minus range. Hmm. Then I found one listing for the latter at $79. Double Hmm. Bought it... sigh.
It arrived yesterday, well-packed and in absolutely beautiful condition. I had to give it a try ... It was evening already so I assembled R Adapter M, tripod mount, Extender-R, and Elmar-R 180mm f/4 onto the M-P and tripod to do a little still-life shooting around the condo. The*lens setup is remarkably compact and light for a 360mm f/8. I coded it in-camera for an R 180mm f/3.4 and made this exposure wide-open:
I have to say that really pleased me. I also made another exposure stopped down two stops (f/8, effective f/16), which nets a bit more DoF and slightly more even illumination center to corners.
If an 2x tele extender does this well, I can only imagine how well the APO version does. But this will do. Next: test the extender with the Telyt-R 250mm outdoors.
My lens kit for the SL just keeps getting better. :-)