Specifications

T-thread long M42×0.75 mm inner thread,
preserves 55 mm back focal
distance as defined by
Tamron.
Pentax (Praktica)
lens adapter
M42×1 mm inner thread,
preserves 45.5 mm back
focal distance.
M48×0.75 thread
adapter
Adapter with inner thread
M48×0.75
Zeiss adapter
M44×1 mm outer thread,
includes fixing nut.
PSB-1100 adapter Threaded adapter for
TeleVue PSB-1100 coma
corrector
Canon EOS lens
adapter
Standard Canon EOS
bayonet adapter
Nikon F lens
adapter
Standard Nikon F bayonet
adapter
T-thread (M42×0.75) adapter or M42×1 adapter cause vignetting when used
with G3-11000. Also common coma correctors (often equipped with T-
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