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  • Borg 90FL f5.6 alla fluorite con unità teleobiettivo BU-1 Borg 90FL f5.6 alla fluorite con unità teleobiettivo BU-1

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

Product code: BORG90FLBU1

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Quick Overview

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!

Availability: Available

Details

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

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

Technical 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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