Omegon Telescope 90/500 OTA


Omegon 90mm guide scope – the all-in-one travel telescope and guide scope. The Omegon 90mm telescope is ideal for wide-view observing or for guiding using faint stars. When smaller guide scopes fail because there is no bright star in their field of view, the Sky watcher 90mm refractor comes into its own. But there is even more to this telescope.

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SKU: 43767 Categories: ,


For nature-watching and astronomy – 90mm aperture achromatic refractor: Its focal length of only 500mm makes this achromatic refractor telescope extremely compact. This lets you use it not only as a guide scope, but also on holiday as a travel telescope for wide-field observing. An interior baffle system and a multi-coating on the lens doublet ensure reflections are minimized. Observe with a 2″ eyepiece at low magnification and experience fantastic views of the night sky and nature. With magnifications of up to a respectable 80X, you can also ‘go into detail’ with the telescope.

Refractor as guide scope: The 90/500mm achromat comes with a double ring clamp and an adapted prism rail receiver, allowing you to attach it to any refractor mount equipped with a GP receiver. Use a double mounting and a guide scope mount for astrophotography and everything is ready for your imaging. Another option is to mount your guide scope via an optional guide scope ring clamp.

Crayford focuser: This 90mm refractor has a 2″ Crayford focuser for a precise and easy focusing. Use your 2″ eyepieces for wide-field observing or the 1.25″ reducer-adapter for all your 1.25″ eyepieces.

Sturdy metal OTA: The 90mm refractor features a rugged metal OTA with a retractable dew shield. This not only has high quality looks, but also helps to protect the optics.

The advantages in a nutshell:

  • Achromatic 90mm aperture refractor
  • Suitable as guide scope and travel telescope
  • Complete package, with guide scope rings

Type Refractor
Type of build Achromat
Aperture (mm) 90
Focal length (mm) 500
Aperture ratio (f/) 5,5
Resolving capacity 1,15 (Rayleigh)
Limit value (mag) 12,2
Light gathering capacity 165
Max. useful magnification 80 (empfohlen)
Tube weight (kg) 2,2
Tube construction Full tube
Type of build Crayford
Connection ( to eyepiece) 2
Back focus (mm) 130mm (above 2″)
GoTo control no
Type of build OTA
Mounting type no mount
Included accessories
Tube clamps yes
Carrying bag yes
Eyepiece adaptor 1,25″ & 2″
Special recommendation yes
Area of application
Astrophotography yes
Nature Observation yes
Moon & Planets yes
Nebulae & galaxies not recommended
Sun not recommended (Only with appropriate Sun filter)
Recommended for
Beginners no
Advanced yes
Observatories no

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