The classic four inch: all-around lens comfort with Hexafoc!
The Bresser AC 102/1000 Messier Hexafoc OTA is the classic four-inch refractor for your own mount. At f/9.8, chromatic aberration is well under control, and you get true-to-life, high-contrast images of the Moon, planets, and double stars, with the 2.5-inch Hexafoc as a sturdy base for heavy eyepieces.


Classic f/9.8 achromat
The 102mm lens captures approximately 212 times more light than the naked eye. With the 26mm eyepiece, you get 38x magnification; consider approximately 204x as the maximum. A refractor has no obstruction and no collimation: set it up and look.
Which mount fits this?
The meter-long tube calls for stability: the Bresser EXOS-2/EQ-5 mount with tripod (€539) is the comfortable choice, the Bresser EXOS-1/EQ-4 mount with tripod (€379) the visual minimum. Via the Vixen-Style dovetail, the tube fits on any mount with a standard Vixen clamp.
Included
- Achromatic optics 102/1000
- 2.5-inch Hexafoc Focuser
- 26mm eyepiece (1.25 inch)
- 6x30 binocular
- Zenith mirror
- Vixen-Style dovetail
Featured accessories
The Bresser Plössl 10 mm eyepiece (100x, 29 euro) is the core magnification. An Omegon Premium 2-inch moon filter (34.90 euro) dims the moonlight. For transport, the Padded case for refractor telescopes 102/1000 (89 euros).
For whom yes, for whom no
For: Lovers of the classic, maintenance-free lens look on an existing mount. Not for: Deep-sky hunters; a Newton OTA offers more aperture per euro. Compare on the refractor page. Meer Bresser is on the merk page.
Specifications
| Optical design | Achromatic refractor (two-lens) |
| Opening | 102 mm |
| Focal length | 1000 mm (f/9.8) |
| Focuser | 2.5 inch Hexafoc |
| Execution | Optical Tube Assembly (OTA) |
| Supplied eyepiece | 26 mm |










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