TS-Optics 102 mm f/11 SD – FPL53 APO Apochromat with 2.5″ RAP focuser

Description

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.

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 path compensation.

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.

Specifications:

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
Tube weight: 4.6 kg

Mounts

Use the TS Optics 102 with your choice of Mount. For visual, we recommend a Saxon EQ3 w/Steel Tripod and pier extension (adequate), a Kson EQ4 with a pier extension (very good), or  HEQ5 or EQ6 Pro with relevant Pier if your looking at automating. 

What’s this about being especially suitable for binoviewers?

Binoviewers are remarkable devices that look like a binocular, but attach into your telescope, allowing you to use both eyes (stereo) for viewing.  The TS Optics 102 was designed from the ground up to be highly compatible with binoviewers.  This means that usually, you will NOT need to use an optical corrector, or barlow to make use of them, allowing improved viewing quality, a greater range of compatible eyepieces, and a wider view that would be otherwise possible.  They provide a stunning experience with this particular telescope.

We recommend the Celestron #93691 Stereo Binocular Viewer, coupled with some lightweight eyepieces to get started with binoviewing.

Questions?  Call us on 1300 ASTRODOG or just use the form!

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