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FC-100DF

The Takahashi FC-100DF apochromatic refractor is designed around a fluorite doublet at F/7.4.
Description

The Takahashi FC-100DF apochromatic refractor is designed around a fluorite doublet at F/7.4. It is equipped with a 50.8 mm rack-and-pinion focuser, larger than that of the FC-100DC, allowing the mounting of heavier cameras. Its use remains very versatile and even a small mount will make it possible to exploit its full potential.

If you want to make astrophotography at the native focal length of the refractor, a field corrector is available. It can also be equipped with a focal reducer : either the 76D-RD model normally intended for the small focuser, or the FC-35RD model, specific to the FC-100DF and its 50.8 mm focuser. The use of the latter is recommended for cameras or APNs equipped with APS-C or higher sensors.

Characteristics
Optical characteristics
Objective Fluorite doublet apochromat
Lens cell Air-spaced doublet. Fluorite in the back
Coatings Hard multicoatings
Diameter 100 mm
At prime focus
Focal length 740 mm
Focal ratio F/7.4
Metal Back Distance 223 mm
With 76D-FL field corrector
Focal length 770 mm
Focal ratio F/7.7
Image circle diameter 35 mm
Metal Back Distance 56.2 mm
With FC/FS MFL1.04X field corrector
Focal length 757 mm
Focal ratio F/7.6
Image circle diameter 44 mm
Metal Back Distance 81.4 mm
With 76D RD focal reducer
Focal length 540 mm
Focal ratio F/5.4
Image circle diameter 30 mm
Backfocus 56.2 mm
With FC-35RD focal reducer
Focal length 480 mm
Focal ratio F/4.8
Image circle diameter 44 mm
Metal Back Distance 74.1 mm
With EX-Q1.6X focal extender
Focal length 1185 mm
Focal ratio F/11.9
Metal Bck Distance 157 mm
With C2X focal extender
Focal length 1480 mm
Focal ratio F/D 14,8
Metal Back Distance 73 mm
Mechanical characteristics
Length of the optical tube 785 mm (with fixed dew-shield)
Diameter of the optical tube 95 mm
Diameter of the dew-shield 124 mm
Weight 3.6 kg
Focuser Rack-and-pinion

Spot-diagram of Takahashi FC-100D refractor at prime focus

Spot-diagram of Takahashi FC-100D refractor with 76D FL field corrector

Spot-diagram of Takahashi FC-100D refractor with FC/FS MFL1.04X field corrector

Spot-diagram of Takahashi FC-100D refractor with FC-35RD focal reducer

Documentation

System-charts

System-chart of Takahashi FC-100DF telescope Télécharger
System-chart of Takahashi FC-100DF refractor with FC-35RD Télécharger
System-chart of Takahashi FC-100DF refractor with Extender Q 1.6X Télécharger
System-chart of Takahashi FC-100DF refractor with Extender C2X Télécharger

Available configurations

FC-100DF refractor

Reference : [TFK10100]
[TKA00551] - Finder 6x30
[TKA00562] - Finder bracket for 6x30 finder
[TKA21420] - Cradle 95S
[TFK10110] - FC-100DF refractor OTA

FC-100DF refractor OTA

Reference : [TFK10110]

gallery

M52 and Bubble Nebula by Maxime Delin

FC-100DF refractor
FC-100DF refractor
FC-100DF refractor OTA
FC-100DF refractor OTA