TS-Optics 90 mm f/5 Quintuplet Flatfield APO Refractor Telescope - with optical test

TS 90 mm f/5 Quintuplet Apochromat with full image field correction beyond full frame size format

The 90 mm f/5 quintuplett has been developed for astrophotography with large, but also high-resolution sensors as used in modern astro cameras and system cameras. The image is free of annoying chromatic aberrations and reflections with very good sharpness over the entire image field.

Astrophotographic results obtained with this telescope on Astrobin

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

With about 5.2 kg and only 36 cm transport length, the telescope is very compact and even suitable for air travel. We recommend a mount of the EQ5 class or an even more stable one as base.

Other features and benefits of the 90 mm f/5 quintuplet:

The corrector is fixed in the tube, as soon as you have focused the camera, you are automatically at the right distance for an optimal field correction.

The 3.7" focuser is supplied with an extension from M63x1 to M48x0.75 with a screw-in option for 2" filters.

Tilting mechanism with push and pull screws to compensate for a misalignment of the camera sensor for perfect edge stars.

This is how we hand over the apo to the amateur:

Every single TSAPO100Q 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

Customer photos

Here are a few images - only scaled, but not cropped - by our customer Djoni Kalashyan:

"My name is Djoni Kalashyan and for astro my name is Djo Astro, I am 34 years old I live in Rouen,
I started astronomy in 2020 but I was attracted to astronomy since I was small.
some I have several photos that I took with ts76edph and it´s been 2 months since I have my new Tsapo90f5q glasses and
I have managed to take only three photos for the moment with my setup quintupled the seagull, cone nebula and also my last photo it is ic1805."


Seagull Nebula NGC 2177
Photographer: Djoni Kalashyan
Imaging optics: TSAPO90F5Q
Camera: ZWO ASI2600MC Pro



Conus Nebula NGC 2264
Photographer: Djoni Kalashyan
Imaging optics: TSAPO90F5Q
Camera: ZWO ASI2600MC Pro




Photographer: Djoni Kalashyan
Imaging optics: TSAPO90F5Q
Camera: ZWO ASI2600MC Pro

Heart Nebula IC 1804

Question:
How to adjust the screws, where to connect a ZWO EAF focusing motor?

Answer from Teleskop-Service:
TS has created a short bilingual guide, which you can download here.

Safety informations: PDF Download