While waiting impatiently for the 200-800, I have been fiddling with extension tubes on the 800 f/11. The first set I got was from Vello and they were pretty sloppy. Today I got a set from Meike and they are better. Not wonderful, but definitely usable. the weather has been fairly dark and the shots below were taken in between rain showers at ISO 6400 on the R7. There was enough light for correct exposure at 1/320 s. I used both tubes in tandem for 31mm of extension and now my close focus is in the neighborhood of 14-15 ft, which definitely helps with magnification. So far the results are noticeably better than standing back with the 1.4 TC added to get similar magnification. Here are a few samples slightly cropped and downscaled to 4k to fit the site and they make nice backgrounds for a 4k monitor . Processing was LR enhance followed by a light pass with Topaz Denoise for final cleanup and a bit of sharpening. Other adjustments pretty routine.
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