TS-Optics 102 mm f/11 SD - Apochromat with 2.5" RAP focuser

TS-Optics 102 mm f/11 SDP APO Refractor

A refractor with a 2-element objective and a correction like a triplet apochromat, this is realized by the TS 102 mm f/11 SDP Apo. The objective consists of two special glasses, including FPL53 from Ohara (Japan). The apochromat not only holds good chromatic correction in the spectral range of 480-656 nm, but due to the relaxed focal ratio of f/11 and the additional special glass, the correction is still very good even in the violet and short wavelength blue light. This makes the apo a fine telescope for observation and photography, if you want to get the optimal performance out of 102 mm aperture.

Astrophotographic results obtained with this telescope on Astrobin

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

Binocular observation:
If you remove the rear tube end piece, the working distance increases from 150 mm to 270 mm, with the draw tube retracted. This also allows you to combine binoviewers and a 2" star diagonal and observe without glass path compensation.

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