Male Red-winged Blackbird at 5600mm

I was pushing the limits today. I took this shot of a male Red-winged Blackbird perched on a branch about 80 feet away, according to the focus ring dial. I was using my manual focus Tamron Adaptall-2 Model 55B SP 500mm f8 mirror lens and Tamron Adaptall-2 01f 2X Flat Field Teleconverter with a generic Pentax bayonet mount, attached to an inexpensive Chinese-made Pentax K to Q adapter, all on my original model Pentax Q Camera, all mounted to my heavy-duty 1970s vintage Slik aluminum tripod. I released the shutter via a hand held IR remote. On a film camera, this lens set-up would function as a 1000mm f16. But on my Q, with its 5.6X crop factor, this set-up functions as a 5600mm f16 telephoto lens. This shot was taken through my opened office window, on the second floor, and I had to put up with having to sit on my comfy office chair, such hardships. This was a lens test shot. I found the original to be looking washed-out and edited it in FastStone to reduce the highlights and add some contrast.