Takahashi TKA20420W - 80WB Double Clamps
A pair of Takahashi 80WB collars for this telescope. The 220B dovetail for the mount is sold separately.
CHF 146.06
Takahashi FS-60Q 60-mm telescope with built-in 1.7× CQ extender: 600 mm at f/10 for observation, and a 355-mm configuration at f/5.9 when the extender is removed. Tube only (TSK06310).
CHF 1'098.00incl. Swiss VAT
Reference TSK06310
Will be ordered for you
Delivery time: 5 to 7 business days
Estimated shipping: Between November 23 and 24, 2026
The Takahashi FS-60Q TSK06310 combines a fluorite doublet tube with the CQ extender to provide a focal length of 600 mm at f/10. This configuration is particularly well-suited for planetary observation. The finder scope, its mount, and the mounting collar are sold separately.
The 60-mm objective is an air-spaced apochromatic doublet, with the fluorite element at the front. Combined with the 1.7× extender, it forms a four-element lens assembly. Takahashi describes a flat field and optimized chromatic correction for this f/10 configuration, which is designed specifically for planetary observation.
The manufacturer recommends removing the extender to return to an FS-60CB configuration with a 355 mm focal length and f/5.9 aperture. This second configuration is described as better suited for deep-sky imaging. Removing or installing the extender allows you to choose the configuration that best suits your needs. The 550 mm length and 1.6 kg weight listed here are for the tube in the FS-60Q configuration.
To set up the instrument, distinguish between the optical components that make up the tube and the mounting or sighting accessories. The assembly diagram and instructions available on the Takahashi product page will help you prepare your chosen configuration before selecting additional adapters.
How does it differ from the TSK06300NR package?
The kit adds the TKA00551 6×30 finder scope, its TKA00562 mount, and the TKA20420Q 80QS clamp to the TSK06310 tube. These accessories are not included with the tube alone.
Do I need to buy the extender separately to get the 600 mm?
No: The FS-60Q described here includes the configuration with the 1.7× CQ extender. The official focal length to use is 600 mm at f/10.
Takahashi TSK06310 Official Spec Sheet : Specifications and identification of this part number.
The Takahashi FS-60Q is a fluorite doublet refractor with a Q extender, featuring a 60 mm aperture and a 600 mm focal length (f/10), 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/10, which is rather slow for deep-sky imaging, it benefits from being used with a focal reducer.
With an APS-C camera featuring 3.76 µm pixels (Sony IMX571 sensor), you get approximately 1.29″ per pixel for a field of view of 2.2° × 1.5°. With the 0.72× crop factor, this increases to 1.8″ per pixel and a field of view of 3.1° × 2.1°.
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 RD C0.72X: Reducer for FS-60 (equivalent focal length of 432 mm, f/7.2); Takahashi Multi Reducer 0.85×-S for FS-60 (equivalent focal length of 510 mm, f/8.5).
158.4 mm (metal back). This focal length is measured from the thread to the sensor, including the rings, filter wheel, and filter drawer: adhering to this measurement down to the millimeter ensures that the stars remain round in the corners.
The tube weighs about 1.6 kg; with the camera, filter wheel, and guide scope, expect it to weigh around 3.1 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 55 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 120×.
Here are a few accessories we've selected for this model, depending on your needs.
A pair of Takahashi 80WB collars for this telescope. The 220B dovetail for the mount is sold separately.
Vixen Takahashi 220B dovetail for 80WB clamps, sold separately. Check your mount's clamping mechanism and balance.
Optional top plate for Takahashi 80WB mounts, for attaching accessories. Mounts and lower dovetail sold separately; check spacing, clearance, and balance.
Optional 100 upper bridge for the two 80WB clamps, sold separately. Takahashi confirms their compatibility even though the product sheet lists 95WB. An alternative to the 220B bridge, distinct from the lower dovetail.
0.85×-S reducer for the FS-60Q after removing its CQ 1.7× extender: photographic configuration at 300 mm and f/5. The camera-side photographic ring must be selected separately; check the back focus according to the Takahashi diagram.
0.72× reducer for the FS-60Q after removing the CQ 1.7× extender. Alternative to the 0.85×-S Multi Reducer: use a single reducer and check the focus ring and focus distance.
FC-76DCU Conversion Kit: Replace the 60 mm lens and remove the 1.7× CQ for native focal plane configuration. Check the optical connections and accessories after conversion.
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.
Recommended diameter: 150 mm. Check the measurement and the mounting.
