TAKAHASHI
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.
Available Upon Request
In this case, we do not keep the products in stock but are only available upon pre-order. As soon as we receive your order, we will notify you by e-mail or phone, about the exact delivery time.
FC-76DCU TUBE ASSEMBLY COMPLETE D-76mm F-570mm F/7.5 (FLUORITE DOUBLET)
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.
Net Weight (g) | 1900 |
---|---|
Optical design | Apochromatic Refractor |
Aperture (mm) | 76 |
Focal length - F (mm) | 570 |
Focal ratio (f/) | 7.5 |
Mount | Not included |
Finderscope | 6x30 |
Maximum useful magnification (x) | 152 |
In the box:
Characteristic | Takahashi FC-76DCU refractor |
Objective | Fluorite doublet apochromat |
Lens cell | Air-spaced doublet. Fluorite in the back. |
Coatings | Hard multicoatings |
Length of the optical tube | 656 mm (with dew-shield) |
Diameter of the optical tube | 80 mm |
Diamètre of the dew-shield | 80 mm |
Focuser | Rack-and-pinion |
At prime focus | |
Focal ratio | 570 mm |
Focal ratio | F/7.5 |
Metal Back Distance | 159 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 |
Spot-diagram of the Takahashi FC-76DS refractor at prime focus
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