Hasselblad 63.5-85mm variable extension tube  type_Batteries It will not work on

It will not work on an F mount camera

in case you’re in a big rush to get to the next frame

The Asahi 300mm f4 Takumar is an old-school telephoto lens for cameras with an M42 lens mount

Please check your lens instruction manual for compatibility: this is not a universal teleconverter and it won't work with everything

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Hasselblad 63.5-85mm variable extension tube &nbsptype_Batteries It will not work onThis variable extension tube for Hasselblad V series cameras and lenses provides helicoid based continuous extension between 63. 5 85mm. Ideal for close up work in the field, where a bellows may be less practical and this tube maintains shutter firing and lens cocking functions without the need for cable releases. In excellent condition, with minor cosmetic wear.