Takahashi TKA20420W - 80WB Double Clamps
Pair of Takahashi 80WB collars, an optional alternative to the single collar included in this package. Dovetail for mount sold separately; check the balance.
CHF 146.06
Takahashi FC-76DCU 76/570 telescope with 6×30 reticle finder, mount, and 80QS collar. f/7.5 fluorite doublet. Part number TFK07640C.
CHF 1'628.00incl. Swiss VAT
Part Number TFK07640C
This Takahashi FC-76DCU kit combines a 76-mm apochromatic telescope with a 6×30 reticle finder and an 80QS mount. The finder makes aiming easier, and the mount secures the tube to a compatible mount. The air-spaced, multi-coated fluorite doublet offers a native focal length of 570 mm at f/7.5.
The tube splits into two parts for easy transport. Its compact rack accommodates 31.75 mm threaded accessories and features a focus lock.
For photography, the FC-76DCU can be fitted with an optional field corrector or 76D-RD reducer. The mounting diagram for each accessory specifies the connections and distances to be observed. An optional rotating collar allows you to adjust the framing.
The mount and accessories for observing or photography should be chosen separately based on your specific needs.
Takahashi Manufacturer's Documentation
The Takahashi FC-76DCU is a 76-mm-aperture fluorite doublet refractor with a focal length of 570 mm (f/7.5), designed primarily for deep-sky astrophotography. Its focal length is ideal for medium-sized nebulae (Orion, the Lagoon, the Trifid, and the Rosette), large galaxies such as M33 or the M81-M82 pair, and star clusters. At f/7.5, its classic aperture-to-focal-length ratio requires slightly longer exposure times, but in exchange yields very fine star details.
With an APS-C camera featuring 3.76 µm pixels (Sony IMX571 sensor), you get approximately 1.36″ per pixel for a field of view of 2.4° × 1.6°. With the 0.85× crop factor, this increases to 1.6″ per pixel and a field of view of 2.8° × 1.9°.
Yes, whenever you're using an APS-C or full-frame sensor: like any uncorrected doublet lens, it has a slight field curvature that stretches the stars in the corners. Dedicated correctors: Takahashi Multi Reducer 0.85×-L for FC-76D (equivalent focal length of 484 mm, f/6.4); Takahashi TKA00582: 1.04x MFL FC/FS Corrector.
159 mm (metal back); 75 mm with MFL 1.04×; 56 mm with 76D RD 0.85×. This focal length is measured from the thread to the sensor, including rings, filter wheel, and filter drawer: adhering to this measurement down to the millimeter ensures that stars remain round in the corners.
The tube weighs about 1.9 kg; with the camera, filter wheel, and guide scope, expect it to weigh around 3.4 kg: a small equatorial or harmonic travel mount is sufficient. A refractor requires no collimation: once balanced, it’s ready to use as soon as it reaches operating temperature. At 65.6 cm long, it fits easily in the trunk.
Yes, as a bonus: with an angled mirror and an eyepiece, it provides high-contrast, color-accurate images of the Moon, the planets, and double stars, up to about 152×.
Here are a few accessories we've selected for this model, depending on your needs.
Pair of Takahashi 80WB collars, an optional alternative to the single collar included in this package. Dovetail for mount sold separately; check the balance.
Vixen 220B dovetail for mounting the two 80WB clamps, sold separately. This solution is an alternative to mounting with the included clamp; check the clamp and the balance.
0.85×-L Reducer for FC-76DCU: 486 mm focal length and f/6.4 photographic configuration. Check the photographic connections and alignment according to the Takahashi diagram.
Extender-Q 1.6× to increase the focal length and magnification. Check the connections according to the Takahashi diagram; the 50.8 mm TKA00596 adapter may be required depending on the mount.
For a Takahashi EM-11 or EM-200 mount, this S-mount plate is compatible with the 80QS one-piece collar, which is already included in this package. Separate plate; check the M8 screws, the load, and the balance.
Recommended diameter: 125 mm. Check the measurement and the mounting.
Recommended diameter: 150 mm. Check the measurement and the mounting.
