Photax 400mm 1:6.3 T-Mount Preset, Take II

Digital Moments: Image making with a T-mount Photax 400mm 1:6.3 Preset telephoto lens, totally unexpected images, Take II.

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The T-Mount Photax 400mm 1:6.3 Preset Telephoto Lens, sometimes just referred to simply as a long tube lens, dates back to the 1960s, is a low-cost commonplace lens and can be found under a variety of brand names such as Astranar, Impakt, Photax, D&N, Prinz-Galaxy, Paragon, Sirius, Ensinor, Quantaray, Optomax, Kenlock, Praotor, Hanimex and more.

Olympus E-P5, Photax T-Mount 400mm F6.5

Typically these are 4 elements of front-end focus T-mount lenses with a two-ring preset aperture and a very convenient built-in tripod mount. The unit I tested weighs 741 grams minus the soft velvet pouch and the 340mm hard faux leather sheath it comes in. Images, shot here with the lens mounted on the 2x crop sensor Olympus E-P5, are at the equivalent focal length of an 800 mm lens on a full-frame camera. 

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