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Tamron 500mm f/8 SP Tele Macro (55B) Lens (Requires Adaptall Mount) {30.5}

KEH Model# 251418

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Tamron 500mm f/8 SP Tele Macro (55B) Lens (Requires Adaptall Mount) {30.5} Description


During the 1979, the Tamron SP 500mm F/8 Tele-Macro Catadioptric (Model 55B) lens was the smallest and lightest 500mm mirror telephoto lens. The lens employs mangin mirrors, continuous focusing down to 1:3 macro, and 30.5mm rear filter thread. Macro performance is good but with softness in the corners due to off-axis coma. Light transmission is very close to F/8 and light fall-off is a mere 0.75 stop.

"Mirror" lenses refer to systems comprised of reflecting mirrors with lenses, a combination that allows telephotos to be lighter and more compact than conventional lenses. The effect on the image is ring blur - great for portrait work. The beauty is heightened even more when lighting is effectively used in shooting, resulting in photographs with overwhelming emotive power. Characteristics that make this lens a true classic. This improved model delivers better performance at close range with increased peripheral light. The use of rear-insertion type filters enable rapid secure filter changes. The barrel's rugged ZEN finish helps it withstand hard outdoor use.

KEH Specifications

  • Focal Length: 500m
  • Aperture Range: Fixed at f/8
  • Mount Type: Adaptall
  • Format Compatibility: 35mm, APS-C
  • Angle of View:
  • Minimum Focus Distance: 66.9" / 1.7m
  • Macro Mag. Ratio: 1:3
  • Elements/Groups: 7/4
  • Autofocus: No
  • Tripod Collar: No 
  • Filter Thread: 82mm in front, 30.5 screw-on for the rear 
  • Dimensions: ø3.3" x 3.4"
  • Weight: 575g / 20.3oz


General information

Brand Name Tamron
Product information
Lens Type Long / Telephoto

Technical Information

Fixed Focal Length 500 mm
Max Aperture f/8

Physical Characteristics

Lens Mount Tamron Adaptall