Digital Moments: Image making with a Photax T-mount Preset 400mm f/6.3 telephoto lens, totally unexpected images, Take II.
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The T-Mount Photax 400mm f/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.
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.
Olympus E-P5, Photax T-Mount Preset 400mm f/6.3
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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