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Borg 90FL f5.6 Fluorite with Telephoto Lens Unit BU-1

Borg 90FL f5.6 Fluorite with Telephoto Lens Unit BU-1
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Price:  Please Call to Confirm the Price(Inc. 20% VAT)

Product Code:  BORG90FLBU1
Manufacturer:  Borg

Borg


Borg 90FL f5.6 fluorite with telephoto lens unit BU-1 uses the Borg 90FL lens with 90mm diameter and 500mm focal length (f5.6) and it has a very very compact and lightweight body, equipped with precision helical focusing and photographic tripod mount. Thanks to special photo adapters, field flatters and telextenders, you can adapt it to your photographic needs!

Borg 90FL f5.6 fluorite with telephoto lens unit BU-1 includes 90FL lens (2591) and BU-1 telephoto lens unit (9000), the other accessories for the connection of the DSLR camera must be purchased separately. In the scheme below, you can see three configurations:

1) Direct focus (for DSLR cameras up to APS-C sensor): focal length 500mm

2) With 1.4x telextender (for DSLR cameras up to Full Frame sensor): focal length 700mm

3) With 1.08x field flattener (for DSLR cameras up to Full Frame sensor):focal length 540mm

Borg 90FL f5.6 fluorite with telephoto lens unit BU-1

Borg 90FL f5.6 fluorite with telephoto lens unit BU-1

Specifications:

  • Optical Design: Apochromat
  • Optics: Doppietto alla fluorite
  • Diameter (mm): 90mm
  • Focal Length (mm): 500mm
  • Focal Ratio: f5.6
  • Field flattener/corrector: Not included (optional)
  • Optical Tube: Aluminium
  • Obstruction    -
  • Focuser: Elicoidale
  • Eyepiece holder: No
  • Weight: 2,5
  • Hard/soft case: No

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