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FC-76DCU

The Takahashi FC-76DCU apochromatic refractor is equipped with a fluorite doublet at F/7.5.
Description

The Takahashi FC-76DCU apochromatic refractor is equipped with a fluorite doublet at F/7.5. Its very low weight, only 1.9 kg for the tube alone, makes it a very portable instrument, usable on a simple photo tripod. It comes with a fixed dew shield and a 31.75 mm compact rack-and-pinion focuser inherited from the FS-60CB. A brake locks the focus and it is possible to add an optional Camera Angle Adjuster (CAA) to make it easier to frame the picture.

The FC-76DCU can be equipped with a focal reducer (76D-RD) or with a field corrector (76D-FL or multi-flattener FC/FS MFL1.04X) for deep sky imaging.

The 80 mm diameter tube is in 2 parts. It can receive the Extender 1.7XR from the FS-60Q, which increases the F/D ratio from 7.5 to 12.75. The focal length gain then allows optimal chromatic correction for unforgettable planetary observations.

For FS-60CB owners, there is a conversion kit available to convert this refractor to FC-76DCU.

Characteristics
Optical characteristics
Objective Fluorite doublet apochromat
Lens cell Air-spaced doublet. Fluorite in the back.
Coatings Hard multicoatings
Diameter 76 mm
At prime focus
Focal ratio 570 mm
Focal ratio F/7.5
Metal Back Distance 159 mm
With 76D FL field flattener
Focal length 594 mm
Focal ratio F/7.8
Image circle diameter 40 mm
Metal Back Distance 56.2 mm
With FC/FS MFL1.04X field corrector
Focal length 589 mm
Focal ratio F/7.8
Image circle diameter 44 mm
Metal Back Distance 85.2 mm
With 76D RD focal reducer
Focal length 417 mm
Focal ratio F/5.5
Image circle diameter 36 mm
Metal Back Distance 56.2 mm
With EX-Q1.6X focal extender
Focal length 916 mm
Focal ratio F/12
Metal Back Distance 157 mm
With 1.7XR focal extender
Focal length 969 mm
Focal ratio F/12.8
Mechanical characteristics
Length of the optical tube 656 mm (with dew-shield)
Diameter of the optical tube 80 mm
Diamètre of the dew-shield 80 mm
Weight 1.9 kg
Focuser Rack-and-pinion

Spot-diagram of the Takahashi FC-76DS refractor at prime focus

Spot-diagram of the Takahashi FC-76DS refractor with 76D-FL field corrector

Spot-diagram of the Takahashi FC-76DS refractor with FC/FS MFL1.04X field corrector

Spot-diagram of the Takahashi FC-76DS refractor with 76D-RD focal reducer

Documentation

System-charts

System-chart of the Takahashi FC-76DCU refractor Télécharger
System-chart of the Takahashi FC-76DCU refractor with Extender-C2X Télécharger
System-chart of the Takahashi FC-76DCU refractor with Extender-Q1.6X Télécharger

Instruction manuals

Takahashi FC-76DC refractor's instruction manual Télécharger

Available configurations

FC-76DCU refractor OTA

Reference : [TFK07640]

FC-76DCU refractor

Reference : [TFK07640C]
[TKA00551] - Finder 6x30
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[TKA20420Q] - Cradle 80QS
[TFK07640] - FC-76DCU refractor OTA

FC-76DCU refractor OTA
FC-76DCU refractor OTA
FC-76DCU refractor
FC-76DCU refractor