my photo equipment

Nikon D300,  digital SLR body.

with 

Sigma 500mm f4.5 APO EX HSM DG  (= 750mm f4.5 on D300)

and

Nikon Teleconverter Nikkor TC-14E II (x 1.4)  

(= 1050mm f6.3 on D300 with the Sigma 500mm).

Gitzo tripod GT5530S + Wimberly II head

also still Nikon Coolpix 4500 on telescope Optolyth TBS-80 (30x)

previously   Nikon D70 and 

Nikon 300mm f4 ED AF-S Nikkor  (= 450mm f4 on D70 / D300)