TS-Optics CF-APO 155 mm f/8 Deluxe Triplet Refractor - with certificate and optical test

TS-Optics CF-APO 155 mm f/8 FPL55 Triplet Apochromat

The largest apo from Teleskop-Service is the inexpensive entry into the world of really big refractors. Such a telescope offers joy for a lifetime and is an attraction in every observatory. This apochromatic refractor offers a number of interesting features:

Apochromatic triplet lens with FPL55 as APO element and additional special lanthanum glass for even better chromatic correction.

Improved cell for even more adjustment stability, the cell is adjustable via pull and push screws.

A very good 3.7" focuser with rack and pinion drive. The drawtube is ball bearing mounted for precise adjustment even under heavy loads, for example by heavy cameras.

Generous working distance of 140 mm from the 2" receptacle, which can be further extended by a removable segment between tube and focuser. This even allows the use of binoviewers without glass path compensation.

Each apo is delivered with a test certificate by the manufacturer. The apochromat is given a serial number. In addition, each apo is tested on the optical bench at Teleskop-Service and optimally calibrated again.

Astrophotography with the TS CF-APO 155 mm

Basically the apo can be combined with all suitable correctors. We especially recommend the following correctors, which are linked in the recommended accessories.

TSFLAT3 - 1.0x corrector
The corrector is screwed directly onto the M92 thread of the focuser. The corrector provides illumination and correction up to 60 mm image circle diameter. The focal length is not changed.

TSRedJM63B - 0.8x corrector
The corrector is screwed directly onto the M63 thread of the focuser. It reduces the focal length to 992 mm and improves the focal ratio to f/6.4. The corrector provides illumination up to 42 mm image circle diameter.

TSAPORED075 - 0.74x corrector
The corrector is screwed to the M92 thread of the focuser with the Adapter M92A-M88i (optional, linked in the accessory section). It reduces the focal length to 917 mm and improves the focal ratio to f/5.92. The corrector provides illumination up to 44 mm image circle diameter.

Astrophotographic results obtained with this telescope on Astrobin

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

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 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

First Light at a customer

Roman Vanur from the Czech Republic (https://astrofotky.cz/~rick) captured a nice image of the Orion Nebula as First Light:

Object: Orion Nebula (M 42)
Photographer: Roman Vanur (Czech Republic)
Imaging date: 2022-02-12
Telescope: TS-Optics CF-APO 155 mm f/8 Deluxe Triplet Apo (TSAPO155f8)
Imaging corrector: TS Flat 3" (TSFlat3)
Imaging camera: Fujifilm GFX 50S
Auto guiding: Lacerta MGEN II (MGEN-3 as successor)
Mount: Skywatcher EQ6-R PRO SynScan (EQ6-R)
Exposure: 11x 8 min / ISO 100

Congratulations on this beautiful "First Light"!

Question:
Does the EAF motor focus fit to the CF Apos from Teleskop-Service?

Answer from Teleskop-Service:
The EAF fits directly without additional adapter to the focusers of the CF Apos.

Adjustment in case of annoying image shift

The image may shift if the focusing direction is changed or the telescope is swiveled. The problem can be solved by adjusting the distance from the pinion to the rack. Here are the instructions: Adjusting-the-TS-CF-Apo-Focuser.pdf

Safety informations: PDF Download