Manufacturer: -TS Teleskope
Product number: TSR1021OTA

EUR 849,00RRP EUR 999,00you save 15% (EUR 150,00)


incl. 19 % VAT (DE)  
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rating: 5.0 of 5
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TS-Optics 102 mm f/11 ED-Doublet Refractor, Optical Tube
This telescope is optimized for visual observation and photography of objects within the solar system. The ED is equipped with a high-quality ED objective and improved mechanics. The result of the new development is an image practically free of chromatic aberration and a contrast of moon and planet that sets standards in this telescope class. The 102 f/11 ED is a portable all-round telescope, we recommend the refractor especially for the following areas:
Watching nebulae and galaxies: With suitable 2" accessories, you can see a field of view of 2.4° in the sky. Large field observations become possible. But also double stars, compact nebulae and star clusters can be observed well.
Photography and observation of solar system objects: The beautiful contrast and the practically non-existing chromatic aberration of the refractor allow detailed images of the moon and planets.
Solar observation and solar photography: The contrast performance of the ED objective makes the refractor a good solar telescope for observing and photographing the sun in white light, calcium and H-alpha.
Binocular observation: When you remove the rear end of the tube, the working distance increases from 150 mm to 270 mm when the extension tube is retracted. You can also combine binoviewers and a 2" star diagonal and observe without path compensation.
Daytime observation: With an Amici prism you get an upright and non-mirrored image, like through a spotting scope. The image, however, is brighter and more contrasting than with a comparable spotting scope, which costs many times more.

Astrophotographic results obtained with this telescope on Astrobin
Here you can find some astrophotographs made with this telescope model: Link to Astrobin

The advantage of a 102 mm f/11 ED refractor:
In direct comparison to an achromatic refractor of similar size, the TS 102ED offers better color fidelity with excellent contrast. 102 mm aperture collect 63% more light than a telescope with 80 mm aperture. This makes the 102ED also an exciting telescope for deep sky observation. The relaxed focal ratio of f/11 and the high-quality 2.5" RAP focuser allow very accurate focusing. The maximum magnification range of approx. 250x can already be achieved with good inexpensive eyepieces. The 102 mm ED is an exciting alternative for all amateur astronomers who are looking for a flexible and portable telescope for all observation areas of amateur astronomy.

Technical Information
Teleskop-Service has collected a lot of helpful information about refractors and provided it in English as a PDF file: refractors.pdf
Aperture:102 mm
Focal length:1122 mm
Focal ratio:f/11
Objective:Dublet ED objective (FPL51 with additional special glass) in adjustable cell
Resolving power:1.15"
Limiting magnitude visually:11m8
Dew shield diameter:121 mm outside, 110 mm inside
Tube length with retracted dew shield:1000 mm
Tube diameter:105 mm
Tube extension:120 mm long, M85x1 thread
Connection Thread for focuser:M85x1 female
Tube weight:4.6 kg
TS 102 mm f/11 ED
2" and 1.25" adapter (compression ring)
Dust caps for objective and focuser
Finder shoe
CNC tube rings
Vixen/EQ5 style dovetail bar

Astrophotographic results obtained with this telescope on Astrobin
Here you can find some astrophotographs made with this telescope model: Link to Astrobin


Images with the predecessor instrument by a customer
Our customer Thomas Kraus also imaged deep-sky objects with the previous telescope, an achromat without ED glass, despite the slow focal ratio of f/11. The images are worth seeing:

Object: Leo Triplet

Photographer: Thomas Kraus (Poppenhausen, Germany)
Telescope: TS Individual 102/1100 (predecessor of the TSR1021OTA)
Reducer: TS-Optics REFRAKTOR 0.79x 2"
Filter: Optolong CLS-CCD
Camera: Altair 294C


Object: NGC 3628 - detail from the Leo Triplet

Photographer: Thomas Kraus (Poppenhausen, Germany)
Telescope: TS Individual 102/1100 (predecessor of the TSR1021OTA)
Reducer: TS-Optics REFRAKTOR 0.79x 2"
Filter: Optolong CLS-CCD
Camera: Altair 294C


Object: Messier 5 (spikes via software)

Photographer: Thomas Kraus (Poppenhausen, Germany)
Telescope: TS Individual 102/1100 (predecessor of the TSR1021OTA)
Reducer: TS-Optics REFRAKTOR 0.79x 2"
Filter: William Optics Minus-Violett + Orion Sky Glow
Camera: Altair 294C


Object: NGC 3521 (spikes via software)

Photographer: Thomas Kraus (Poppenhausen, Germany)
Telescope: TS Individual 102/1100 (predecessor of the TSR1021OTA)
Reducer: TS-Optics REFRAKTOR 0.79x 2"
Filter: Baader SemiApo
Camera: Altair 294C




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Reviews

Written by Dana Tousley
on 2023-06-22

"Great mechanics, focuser handles a 31mm Nagler without complaint. Still putting the pieces together but this should make an impressive solar scope."

Written by Frank Köhler
on 2021-12-17

"Mein Fazit bisher: - relativ leicht, aber sehr lang (das hintere Tubusende lässt sich für die Binobeobachtung abschrauben) - mechanisch sehr gut verarbeitet - optisch ein Traum - kein Farbfehler erkennbar - nach meinem Empfinden kann man bis ca. 250fach vergrößern "

Written by Tom Regnery
on 2020-02-08

"Ohne Übertreibung ein phantastisches Instrument. Nie waren meine Mondfotos schärfer und kontrastreicher als mit diesem Gerät. Es ist sehr hochwertig verarbeitet, jedoch auch sehr lang und schwer mit entsprechenden Anforderungen an die Steifheit der Montierung. Letztere besser noch eine Nummer überdimensioniert wählen!"