Optical Tube Assemblies

Optical Tube Assemblies

refracting or refractor telescope is a type of optical telescope

that uses a lens as its objective to form an image

(also referred to a dioptric telescope)

Learn More About Refractors

Optical Tube Assemblies Grovers Optics Northallerton

Optical Tube Assemblies

15 products - next page link at the bottom

Showing 1-15 of 17 item(s)

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  • Apochromatic Refractors, due to their unobstructed, text-book like diffraction patterns, produce the sharpest, highest quality optical imaging available, bar-none, aperture for aperture, of any telescope optical system

    This high-end Evostar-72ED Apo features a doublet objective lens, with one Extra-Low Dispersion (ED) glass element. Top quality Schott glass is utilised for the Crown element

  • Sky-Watcher EvoStar-150ED, 150mm (6") f/1200 Apochromatic Refractors, due to their unobstructed, text-book like diffraction patterns, produce the sharpest, highest quality optical imaging available, bar-none, aperture for aperture, of any telescope optical system.

  • Sky-Watcher StarTravel 150 EQ5
    • On sale!

    Sky-Watcher STARTRAVEL telescopes are two-element, air-spaced achromatic refractors, that are well proven performers for ‘Rich-Field’ views of comets, star fields, star clusters, nebulae, bright galaxies & planets, the Moon and the Sun (with proper safety filtering!), as well as giving excellent daytime terrestrial views when used with an erecting prism (not supplied with this model).

  • Sky-Watcher StarTravel 120 4.75" T OTA
    • On sale!

    Ideal for Daytime Terrestrial Observations as well as Deep-Sky Astronomical Use.
    Sky-Watcher STARTRAVEL telescopes are two-element, air-spaced achromatic refractors, that are well proven performers for ‘Rich-Field’ views of comets, star fields, star clusters, nebulae, bright galaxies & planets, the Moon and the Sun, as well as giving excellent daytime terrestrial views.

  • Sky-Watcher Evostar 100ED DS-PRO OTA With Focal Reducer Corrector
    • On sale!

    The new EVOSTAR DS-PRO Series ED Apochromatic refractors in their stunning Black-Diamond livery, house premium optics of the same quality and performance level as our now legendary Equinox series, making them superb instruments for both imaging and visual observations.

    With Focal Reducer Corrector

  • Sky-Watcher EvoStar-150, 150mm (6") f/1200 Achromatic Refractor Optical Tube Assembly. The Sky Watcher Evostar series are two-element air-spaced, multi-coated object achromatic refractors. They are truly outstanding, high-performance; high-resolution instruments manufactured to extremely high standards and mechanical precision.

  • The new EVOSTAR DS-PRO Series ED Apochromatic refractors in their stunning Black-Diamond livery, house premium optics of the same quality and performance level as our now legendary Equinox series, making them superb instruments for both imaging and visual observations. 

  • Sky-Watcher Evostar 120

    Price £315.00

    An excellent white light solar refractor by adding some Baader Astrosolar over the front aperture. An affordable instrument for schools to purchase for science project astronomical observing. 120mm is easily enough for visibility of all Messier objects as well as good lunar and planetary detail.

  • An excellent rich-field low and medium power small refractor for casual astronomy. A very economic way to own a large aperture spotting scope, or as a guidescope on a larger instrument. Short enough to sit comfortably on Celestron and Meade SCTs, or mounted parallel on a dual saddle plate. 

  • The new EVOSTAR DS-PRO Series ED Apochromatic refractors in their stunning Black-Diamond livery, house premium optics of the same quality and performance level as our now legendary Equinox series, making them superb instruments for both imaging and visual observations.

  • F/7 SUPER APO TRIPLET REFRACTOR

    2” Dielectric Star Diagonal, 28mm 2” LET Eyepiece, 9x50 Right-Angled Erect Image Finderscope, Tube Rings and Dovetail Mounting Bar 

  • F/7 SUPER APO TRIPLET REFRACTOR  
    2” Dielectric Star Diagonal, 28mm 2” LET Eyepiece, 9x50 Right-Angled Erect Image Finderscope, Tube Rings and Dovetail Mounting Bar

  • The new EVOSTAR DS-PRO Series ED low dispersion refractors in their stunning Black-Diamond livery, house premium optics of the same quality and performance level as our now legendary Equinox series,making them superb instruments for both imaging and visual observations.

  • The Sky-Watcher Esprit-80ED Professional Super APO Triplet Refractor OTA are instruments of the highest quality with optical performance rivalling or exceeding similar telescopes of even the most famous high-end telescope brands.