Astronomy Specialist

TAKAHASHI FC-76DS DOUBLET OTA

$2,058.00 USD
SKU: TK-TFK07610

Takahashi

Apochromatic doublet

76 mm

f/7.5

570 mm

3 kg


Style

 

The Takahashi FC-76DS is a Fluorite apochromatic doublet refractor which excels as a mobile instrument for visual and photographic use. The air-spaced fluorite doublet has excellent chromatic correction across the visual spectrum. The optional field flatteners and focal reducers transform the FC-76DS into a widefield astrograph.

The FC-76DS is equipped with a precise rack and pinion focuser designed with imaging in mind. The FC-76DS has a native focal length of 570mm and a focal ratio of f/7.5, making it a versatile instrument for both terrestrial and astronomical use. 

A selection of different field correctors are available to suit different applications (sold separately).

Note: The OTA ONLY variant does not include tube rings or a dovetail bar. For the FC-76DS, you can use the PrimaLuceLab 95mm PLUS tube rings in combination with the PrimaLuceLab 240mm Vixen bar.

 

 

Spot diagram of Takahashi FC-76DS at prime focus.

 

 

Spot diagram of Takahashi FC-76DS with 76D-FL field flattener.

 

 

Spot diagram of Takahashi FC-76DS with FC/FS MFL1.04x field flattener.

 

 

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

 


 

Optical design Fluorite doublet apochromat
Lens cell
Air-spaced doublet, 1 x fluorite lens
Coatings
Hard multicoatings
Objective diameter
76 mm
Focal length at prime focus
570 mm
Focal ratio at prime focus
F/7.5
Backfocus distance at prime focus
173 mm
Dew shield diameter 114 mm
Tube diameter 95 mm
Tube length 660 mm with dew shield extended, 567 mm with dew shield retracted
Tube weight 3 kg
SKU TFK07610

 

Prime focus focal length 570 mm
Prime focus focal ratio
F/7.5
Prime focus backfocus distance
173 mm
76D-FL flattener focal length
594 mm
76D-FL flattener focal ratio
F/7.8
76D-FL flattener backfocus distance
56.2 mm
76D-FL flattener image circle
40 mm
FC/FS MFL 1.04x flattener focal length 589 mm
FC/FS MFL 1.04x flattener focal ratio F/7.8
FC/FS MFL 1.04x flattener backfocus distance 85.2 mm
FC/FS MFL 1.04x flattener image circle 44 mm
76D-RD reducer focal length
417 mm
76D-RD reducer focal ratio
F/5.5
76D-RD reducer backfocus distance
56.2 mm
76D-RD reducer image circle
36 mm
EX-Q 1.6x extender focal length 916 mm
EX-Q 1.6x extender focal ratio F/12
EX-Q 1.6x extender backfocus distance 157 mm

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TAKAHASHI FC-76DS DOUBLET OTA.

TAKAHASHI FC-76DS DOUBLET OTA

From $2,058.00 USD

Style

  • OTA Only
  • Complete Assembly

Optical design

Apochromatic doublet

Image circle

Focal ratio

f/7.5

Aperture

76 mm

Focal length

570 mm

Optical thickness

Threads

Cooled

Colour or Mono

Pixel size

Sensor dimensions

Resolution

Sensor diagonal

Quantum efficiency

Read noise

Fullwell capacity

Bit depth

FPS

Camera backfocus

Filter size

Filter size

Bandpass (FWHM)

Bandpass (FWHM)

Glass thickness

Mount type

Payload capacity

Latitude range

Dovetail saddle

Slew speed

Encoders

Periodic error correction

Counterweight shaft

Azimuth adjustment range

Internal diameter

Illuminated diameter

Compatible telescope external diameter

Weight

3 kg

Length

Width

Height

View product