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Takahashi - FC-76DS Doublet Fluorite Apochromatic Telescope


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Manufactured by: Takahashi


TAKAHASHI •  FC-76DS Doublet Fluorite Apochromatic Refractor Telescope OTA  •  TFK0761

The new FC-76DS is an updated version of the original FC-76 from 1980 by Takahashi. The multi-coated fluorite rear lens and eco-glass front element provides maximum light transmission. The design takes advantage of the advances in high resolution digital imaging. The advanced design allowed the focal length to be reduced by 30mm 594mm at f/7.8.

The FC-76DS by Takahashi features a 3.6” focuser for imaging with CCD cameras and DSLRs. A sliding dew shield is also included and a larger OD90mm tube.

The Takahashi FC-76DS model features a the Sky-90 2.6” focuser to better hold imaging packages which include DSLR’s and CCD cameras with filter wheels. A dedicated flattener as well as extender are available to further enhance the capabilities of the FC-76DS.

The dedicated reducer changes the focal length to 417mm with a focal ratio of f/5.5 and an image circle of  36mm. While the dedicated flattener at f/7.8 and 594mm produces a 40mm flat circle.  See reducer / flattener charts at bottom of this page.


System Charts for FC-76DS APO Telescope by Takahashi

Takahashi Apochromatic FC-76DS Chart 1

Takahashi Apochromatic FC-76DS Chart 3

With field corrector

Focal length 594mm
Relative Aperture F / 7.8
Image circle 40mm
Back-focus 56,0mm 

With focal reducer

Focal length 417mm
Relative Aperture F / 5.5
Image circle 36mm
Back-focus 56,0mm




Additional Information

Name Takahashi - FC-76DS Doublet Fluorite Apochromatic Telescope
Manufacturer Takahashi
Model TFK0761
Manufacturer Part No TFK0761
Aperture 76mm
Backfocus Distance 173.00mm
Focal Ratio f/7.5
Optical Design Doublet fluorite apochromat
Optical Tube Length 550mm