TS-Optics 80PHQ 80 mm f/6.8 Quintuplet Apo with field flatener

TSQ-80APO 80/544 mm FPL53 Flatfield Apo Refractor

The flatfield apochromat provides a well corrected image without chromatic aberration on axis and in the field. Thanks to the 2-element corrector in the tube, a well corrected image circle of 45 mm diameter is at your disposal, so you can also use cameras with full-frame size sensors. You will get perfect star images in the field right from the beginning, without the exhausting search for correctors and the right distance.

Astrophotographic results obtained with this telescope on Astrobin

Here you can find some astrophotographs made with this telescope model: Link to Astrobin

Adaption of cameras to the apo:

Due to the generous working distance between 65 mm and 135 mm from the M68 thread and the generous 90 mm travel of the focuser allows the connection of any popular camera. Besides of the 2" and the 1.25" receptacle, a female M68x1 thread for screw adaptions is at your disposal.

For connecting DSLR or cameras via an M48 thread, you need the adapter M68A-M48A-30 (see recommended accessories). Then you have a working distance of 35 mm to 125 mm from the M48 thread, depending on the position of the drawtube.

Cameras with T2 (M42x0.75) connector additionally need the reducer TSM48i-T2a. The adapter only needs 6 mm optical path, so you have sufficient space for a DSLR with T2-ring or an astro camera.

Features and advantages of the TSQ-80APO:

Modern 80 mm f/6 FPL53 triplet objective

Integrated 2-element field corrector with optimized distance to the objective for optimal sharpness in the field together with slight increase of the focal length

No cumbersome search for adapters - if the image is sharp, you are automatically in the right distance

2.5" CNC rack and pinion focuser with ball bearings and dial speed 1:10

Each quintuplet apo is checked at Teleskop-Service before shipping.

The moderate focal ratio of f/6.8 is well suited for DSLR cameras and for astro cameras.

With 135 mm working distance from the 2" receptacle, even 2" star diagonal mirrors can be used.

A portable first-class apochromat for astrophotography:

Our goal was achieving imaging quality on the axis AND in the field without compromises, and also without additional flatteners or correctors. The corrector has to be built-in permanently and, obviously, in the optimal distance to the objective. This is almost unobtainable by using an optional flattener. Furthermore, the apochromat has to be mechanically solid and easily to adjust. This has been made possible with the flatfield apo.

The focuser has to be stable and, in particular, designed for heavy cameras. With the rack and pinion drive, even heavy accessories can be used. Locking is safely achieved by blocking the adjustment unit. Dual-speed allows precise focusing, so you can get optimal use out of the good image.

Technical Information

Teleskop-Service has collected a lot of helpful information about refractors and provided it in English as a PDF file: refractors.pdf

Astrophotographic results obtained with this telescope on Astrobin

Here you can find some astrophotographs made with this telescope model: Link to Astrobin