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 250 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 AstrobinThe 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.pdfAstrophotographic results obtained with this telescope on Astrobin
Here you can find some astrophotographs made with this telescope model:
Link to AstrobinImages 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 TripletPhotographer: 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 TripletPhotographer: 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