TS-Optics 102mm f/11 ED Refractor with 2.5" RAP Focuser

The new 102mm f/11 ED refractor is optimized for visual observation and photography of the sun, moon and planets.

♦ Colorless image through 2-element ED lens with additional specialty glass, comparable to an FPL53 Doublet at f/8

♦ Adjustable lens mount

♦ Improved 2.5" rack and pinion RAP focuser with photo thread, 2" and 1.25" adaptation

♦ Retractable spray cap for easy transport and optimal protection against stray light

♦ Deluxe viewer support to tailor viewers

♦ Binocular accessories can be used without trajectory compensation

♦ CNC tube rings and EQ5 style dovetail bar included

♦ At just 4.6kg, the ED works well with mounts like the Skywatcher EQ5

receive it in usually 7 to 9 working days

TS-Optics 102mm 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 lens and improved mechanics. The result of the new development is a virtually colorless image and a contrast of the moon and planets that sets standards in this class of telescopes. The 102 f/11 ED is an all-terrain portable telescope, we highly recommend the refractor for the following areas:

♦ Observation of nebulae and galaxies:

With a suitable 2" accessory, you can see a 2.4° field of view in the sky. Wide-field observations are possible. But double stars, compact nebulae and star clusters can also be observed well.

♦ Photography and observation of solar system objects:

The refractor's wonderful contrast and virtually colorless image allow for detailed images of the moon and planets.

♦ Solar observation and solar photography:

The contrast performance of the ED lens makes the refractor a good solar telescope for observing and photographing the sun in white, calcium, and H-alpha light.

♦ Binocular observation:

If you remove the tail tube end piece, the working distance increases from 150mm to 270mm with the draw tube retracted. You can also combine binocular focuses and a 2" diagonal mirror and observe without trajectory compensation.

♦ Observation day:

With an Amici prism you get a vertical, mirrorless image, like through a spyglass. However, the image is brighter and has more contrast than with a comparable spotting scope, which costs many times more.

The advantage of a 102mm f/11 ED refractor:

When directly compared to a similarly sized achromatic refractor, the TS 102ED offers better image color fidelity with excellent contrast. The 102mm aperture collects 63% more light than a telescope with an 80mm aperture. This also makes the 102ED an exciting telescope for deep sky viewing. The relaxed focal ratio of 1:11 and the high-quality 2.5" RAP focuser allow for very precise focusing. The maximum magnification range of approx. 250x can be achieved even with good, inexpensive eyepieces. The 102mm ED is an exciting alternative for all star friends looking for a flexible and transportable telescope for all areas of amateur astronomy observing.


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
Product Details
No comments



QR code