TS-Optics 86 mm f/7 Quadruplet Flatfield Apo - with optical test

TS 86 mm f/7 quadruplet apochromat with full image correction up to full frame format

The 86 mm flatfield apo is a versatile telescope for all astronomical applications. Of course, the apo is ideal for astrophotography thanks to the very good chromatic correction provided by two ED lenses and the field correction up to full frame format. However, the generous working distance also allows the use of 2" star diagonals and accessories for visual observation. The moderate focal ratio of f/7 also makes the apo interesting for observing and photographing the moon and planets. With a transport length of 45 cm, the telescope is very compact and at just under 5 kg, it can still be carried by smaller mounts such as the Skywatcher EQ5 or the Celestron AVX.

The most important features of the 86 mm f/7 apo:

The corrector is permanently installed in the tube; as soon as you have focused the camera, you are automatically at the correct distance for optimal field correction.

The 3.2" focuser is optimized for astrophotography and, in addition to 2" and 1.25" connections, also offers M68x1, M54x0.75 and M48x0.75 connections for threaded adaptations.

Precise 360° rotation and dual speed for precise focusing are available.

A retractable dew shield shortens the transport length and even makes the apo suitable for hand luggage on airplanes.

The apo impresses with its very high-quality mechanical workmanship, such as CNC rings and a versatile carrying handle, which is also suitable for connecting guide scopes.

Each 86 mm quadruplet apo is optically and mechanically checked by Teleskop-Service before shipment.

This is how we hand over the apo to the amateur:
Every single APO is checked in our technical department before it is put into storage, in order to guarantee a consistently high product quality.

The mechanics are tested and the focuser is optimally adjusted.

The lens is cosmetically checked and cleaned. We also check that all counter screws are correctly tightened. These often loosen during transportation.

The optics are collimated and the result is checked on the optical bench. The telescope is given a serial number.

An optical test is carried out, which is enclosed with the telescope (star images and ronchi image on the optical bench in autocollimation).

Only then are the telescopes handed over to the warehouse and prepared for dispatch.

Technical information:
Teleskop-Service has collected a lot of helpful information on refractors and made it available as a PDF file: refractors.pdf

Instructions for adapting the ZWO EAF to the focuser

The instructions language is German and English ... eaf-tsapo-phq.pdf

Safety informations: PDF Download