TS Optics 102/714 ED 1:10 Apochromatic Refractor OTA
This refractor combines a 102mm aperture with a 714mm focal length and a focal ratio of f/7.0, making it equally well suited to visual observing and astrophotography. At its heart is a two-element SuperApo lens made from FPL-51 glass by Japanese manufacturer Ohara - a material with an exceptionally low dispersion index that reduces chromatic aberration to an absolute minimum. The result is a sharp, high-contrast image free from unwanted colour fringing, even at high magnifications or when photographing bright objects. This type of lens performs well on planets and the Moon, as well as on deep-sky imaging.
Precise focuser for visual use and astrophotography
The TS Optics 102/714 ED comes with a 2.5″ dual-speed rack-and-pinion focuser. It runs smoothly and accurately even with heavier eyepiece systems or a camera attached. The output is a standard 2″ barrel with a reduction adaptor to 1.25″, so the telescope accepts common eyepieces and accessories without any issues.
For photographers, the focuser offers M68 and M63x1 threads for direct attachment of focal reducers - including the popular Riccardi 0.75x reducer. The fine micro-geared focuser knob makes it straightforward to achieve precise focus even during demanding imaging sessions.
Compact and transport-ready build
The tube is made from aluminium, which provides good torsional rigidity at a manageable weight. It includes a Vixen dovetail bar. The optical tube is 733mm long with a 105mm outer diameter. The dew shield measures 122mm in diameter and effectively protects the lens during damp nights.
Mounting rings and a Vixen/GP/Sky-Watcher standard dovetail bar are included, so you can attach the telescope directly to a wide range of mounts without needing extra adaptors. The overall assembly is compact and easy to transport, yet rigid enough for stable work on a mount.
Who is this telescope for?
The TS Optics 102/714 ED OTA is an excellent choice for observers who want a capable apochromatic refractor for both visual night-sky observing and astrophotography with a reducer. The combination of a premium FPL-51 lens, a versatile focuser and a standard dovetail bar makes it a flexible instrument that integrates easily into an existing setup.
Key specifications
| Parameter |
Value |
| Optical design |
Apochromatic refractor - FPL-51 ED doublet |
| Aperture |
102 mm |
| Focal length |
714 mm |
| Focal ratio |
f/7.0 |
| Lens material |
Ohara FPL-51 ED glass |
| Focuser |
2.5″ dual-speed rack-and-pinion (R&P) |
| Focuser output |
2″ with 1.25″ reduction adaptor |
| Thread for reducers |
M68 / M63x1 |
| Tube material |
Aluminium |
| Tube length |
733 mm |
| Tube outer diameter |
105 mm |
| Dew shield diameter |
122 mm |
| Weight (with Vixen bar) |
3.98 kg |
| Dovetail standard |
Vixen / GP / Sky-Watcher |
What is included
- Optical tube assembly (OTA)
- 2.5″ dual-speed rack-and-pinion focuser
- 2″ to 1.25″ reduction adaptor
- Mounting rings
- Vixen/GP/Sky-Watcher dovetail bar
- Dew shield
Why choose the TS Optics 102 ED?
- FPL-51 ED glass virtually eliminates chromatic aberration
- Dual-speed focuser handles cameras and heavy eyepieces with ease
- M68/M63x1 threads allow direct use of popular focal reducers
- Standard Vixen dovetail bar fits a wide range of mounts
- Lightweight aluminium tube - easy to transport and set up
- Suitable for planets, the Moon and deep-sky astrophotography
Specifications
Type of telescope:
ED & Apochromats
Optical scheme:
Apochromat Doublet
Focal length:
714 mm
Aperture:
102 mm (4″)
Aperture ratio:
7
Resolving capacity:
1.14"
Limit value:
12.7 magnitude
Light gathering capacity:
212x
Max. useful magnification:
204x
Connection type:
2.5″
Mounting:
No mount
Recommended for:
Advanced, Experienced
Application area:
Astrophotography, Deep Sky observation, Planets observation
Package contents of "Apochromatischer Refraktor TS Optics 102/714 ED 1:7 OTA":
✅ Optical tube with adjustable ED objective lens
✅ CNC tube rings and dovetail mount
✅ 2.5" focuser with reducer to 1.25"
Typical magnifications
The recommended magnification is highlighted in yellow.
D = telescope aperture in millimeters
