Takahashi TKA11420 - 95WB Double Clamps
A pair of Takahashi 95WB collars designed for this telescope. The 220B dovetail for the mount is sold separately.
CHF 164.76
Takahashi FCT-65D TCK06510 telescope with a 65 mm fluorite triplet, native focal length of 400 mm, and F/D ratio of 6.2. Optical tube only.
CHF 1'499.00incl. Swiss VAT
Reference TCK06510
Will be ordered for you
Delivery time: 5 to 7 business days
Estimated shipping: Between November 23 and 24, 2026
The FCT-65D combines a 65-mm objective with a native focal length of 400 mm. Its apochromatic fluorite triplet is assembled with an air gap and features multi-layer coatings. Part number TCK06510 refers to the optical tube only. Its short focal length is well-suited for wide-field photography, when used with a suitable corrector or reducer and a mount adapter of your choice.
At its native focal length, Takahashi specifies a relative aperture of F/D 6.2 and a backfocus of 199.2 mm. These specifications apply to the tube without any additional correctors. They do not apply to photographic configurations using a Multi-flattener or FU RD. The corrected field of 44 mm presented for these configurations should therefore not be automatically attributed to the tube alone. When preparing for imaging, the choice of supplementary optics must be made before selecting the rings and sensor spacing.
The FC/FS Multi-flattener MFL1.04X corrector brings the focal length to 416 mm and the relative aperture to F/D 6.4. In this configuration, the manufacturer specifies a corrected image circle of 44 mm. The backfocus of 56.2 mm is measured from the rear of the Multi CA Ring 65D. This reference point is just as important as the value itself: using a different measurement surface would result in a different spacing. The Multi-flattener and photographic adapters are available as options.
The second configuration detailed in the manufacturer's specifications uses the FU RD 0.65X. The focal length then becomes 260 mm, with an aperture of F/D 4 and a corrected image circle of 44 mm. The mechanical flange focal distance of 56.2 mm is measured here from the rear of the CA-35 FURD No. 19 ring. The reducer consists of four lenses, one of which is made of fluorite. Its placement within the focusing system explains the widening of the rear section of the tube. The reducer is available as an option.
The tube is 403 mm long, with a stated diameter of 95 mm and a dew shield of 80 mm. Its stated weight is 1.9 kg. Focusing is via a rack-and-pinion mechanism. The widened shape of the rear section limits the tube’s range of motion within the clamps; therefore, the choice of mounting and balancing must be evaluated with the complete imaging system. The product description mentions an optional pair of Vixen dovetail clamps, but these components are not included with the tube-only purchase.
The 2025 catalog notes that the telescope and its standard attachments alone do not necessarily allow for infinity focus: depending on the intended use, an angled mirror, a prism, or an extension tube may be required. Refer to the diagram corresponding to your intended use before adding a camera or eyepiece. The values in the table are grouped by configuration to make it easier to choose the right setup.
FCT-65D TCK06510 optical tube. Mounting clamps and the dovetail are not included; the FU RD 0.65X reducer and the Multi-flattener are sold separately. The Takahashi 2025 catalog lists the Camera Angle Adjuster S TKA21200N and the Coupling TKP35001 among the standard accessories included with this model. The mount adapter must be selected separately.
Takahashi TCK06510 Official Spec Sheet ; Takahashi 2025 catalog, PDF page 9.
These accessories are sold separately from the optical tube. For a photographic setup, be sure to use the connectors and spacing specified for your chosen configuration.
The Takahashi FCT-65D is a triplet refractor with a 65 mm aperture and a 400 mm focal length (f/6.2), designed primarily for deep-sky astrophotography. Its focal length is ideal for observing large nebulae such as the North America Nebula, the Rosette Nebula, and the Heart and Soul Nebula, as well as the entire Andromeda Galaxy and the Pleiades with their nebular structures. At f/6.2, its standard aperture ratio requires slightly longer exposure times, but in return delivers very fine star details.
With an APS-C camera featuring 3.76 µm pixels (Sony IMX571 sensor), you get approximately 1.94″ per pixel for a field of view of 3.4° × 2.2°. With the 0.65× crop factor, this increases to 2.98″ per pixel and a field of view of 5.2° × 3.5°.
Yes, whenever you're using an APS-C or full-frame sensor: like any uncorrected triplet lens, it has a slight field curvature that stretches the stars in the corners. Dedicated correctors: Takahashi 65D FU 0.65× — Reducer for FCT-65D (focal length equivalent to 260 mm, f/4); Takahashi Multi Reducer 0.85×-M for FCT-65D and FC-50 (equivalent focal length of 340 mm, f/5.3).
199.2 mm (metal back); 84 mm with MFL 1.04×; 56 mm with 65D RD 0.85× or FU RD 0.65×. 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 40.3 cm long, it fits easily into a bag for travel.
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 130×.
Here are a few accessories we've selected for this model, depending on your needs.
A pair of Takahashi 95WB collars designed for this telescope. The 220B dovetail for the mount is sold separately.
Vixen Takahashi 220B dovetail for 95WB clamps, sold separately. Check your mount's clamping mechanism and balance.
Optional top bracket for Takahashi 95WB mounts, allowing you to attach accessories. The mounts and lower dovetail are sold separately; check the spacing and balance.
0.85×-M reducer for the FCT-65D: photographic configuration at 340 mm and f/5.2. Check the rotating collar, the photographic adapters, and the focus adjustment according to the Takahashi diagram.
FC/FS 1.04× Extender for FCT-65D: 416 mm at f/6.4. Alternative to a reducer; be sure to use the CA-65D TKA11203 Multi Ring and check the connections and focus.
80 mm heating strip for an 80 mm defogger. Check its location and clearance; a 12 V power supply or controller with an RCA connector and sufficient power must be provided separately.
100 mm motorized flat panel for an 80 mm fog guard. Check the mounting area, centering, travel, cables, power supply, and appropriate control; measure the diameter if an additional fog guard is installed.
For visual observation, the Takahashi 50.8 mm extension tube (62 mm optical path) allows for focusing to infinity. An angled mirror or suitable prism is an alternative, depending on the mount; check the connections and the Takahashi diagram.
