Omegon Helical 2″ focuser
Looking for a reliable and precise way to improve focusing on your telescope? The Omegon Helical 2″ focuser is an elegant solution for astronomers who value smooth and accurate focusing without unwanted vibrations or image shift. The helical focusing mechanism is one of the most popular choices among experienced observers and astrophotographers - and for good reason.
Helical mechanism - smooth movement without play
Unlike conventional rack-and-pinion or crayford focusers, this focuser uses a helical mechanism - movement along a spiral path. This brings several practical advantages: the motion is very smooth, free of play and with minimal friction.
A key feature is the non-rotating output barrel - eyepieces and photographic adapters do not rotate during focusing, which is essential in astrophotography, where even the slightest rotation would cause problems with framing or interfere with autoguiding systems. Locking screws ensure a firm and secure hold of accessories in the desired position.
Compatibility and connections
The Omegon helical focuser features a 2″ input, making it compatible with the vast majority of modern telescopes equipped with a standard 2″ focuser or eyepiece drawtube. The output offers both a standard 2″ opening and an M48 thread, which is particularly appreciated by photographers connecting various adapters, filters or DSLR cameras.
An additional filter thread on the input side is a convenient bonus - it allows you to attach filters directly to the focuser without the need for extra step rings. The fine scale graduation of 0.1 mm makes it easy to accurately record and reproduce the optimal focus position, which is invaluable when switching between different eyepieces or during repeated observing sessions.
Travel range and build
A travel range of 42 mm provides sufficient range for most optical systems and allows easy compensation for differences in the length of various eyepieces or photographic adapters. Overall, this is a compact yet fully functional accessory that can significantly enhance the experience of both visual observation and astrophotography - whether on a refractor, reflector or catadioptric telescope.
Key features at a glance
- Helical focusing mechanism - smooth, play-free movement
- Non-rotating 2″ output barrel
- 2″ input - compatible with standard telescope focusers
- Output: 2″ barrel and M48 thread
- Filter thread on input
- Scale graduation: 0.1 mm
- Travel: 42 mm
- Locking screws for secure accessory attachment
- Suitable for refractors, reflectors and catadioptric systems
Technical specifications
| Parameter |
Value |
| Input diameter |
2″ |
| Output |
2″ / M48 thread |
| Filter thread (input) |
Yes |
| Focusing mechanism |
Helical |
| Non-rotating barrel |
Yes |
| Travel |
42 mm |
| Scale graduation |
0.1 mm |
| Locking screws |
Yes |
Who is this focuser for?
The Omegon Helical 2″ focuser is the right choice for those who want full control over their focusing and appreciate the precise engineering philosophy of the Omegon brand - accuracy, simplicity and reliability combined in one compact unit. It is equally suitable for visual observers seeking comfortable and repeatable focusing and for astrophotographers who need a stable, non-rotating connection for their cameras and accessories.
