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Opticstar XL 7.5mm-22.5mm ZOOM Eyepiece
Premium Quality Zoom Eyepiece - Flat Field of View - Top of the Range
Opticstar XL 7.5mm-22.5mm ZOOM Eyepiece.
  • Focal length: 7.5mm-22.5mm ZOOM
  • Apparent field of view of 42° to 66°
  • 1.25" threaded barrel for filters
  • Optical elements: 8 lenses, 5 groups
  • Particularly flat field of view
  • Parfocal at all magnifications
  • Eye relief: 18mm-19.5mm
  • Adjustable twist-type eye cup
  • High contrast optics:
    • Blackened lens edges
    • Internal baffling
  • Excellent mechanical construction
  • Weight: 255 grams
Opticstar Visual
CCD Cameras
Opticstar Imaging
Opticstar XL 7.5mm-22.5mm ZOOM Eyepiece
Model / Description View in Showroom Order code Price inc VAT Shipping Dispatched witnin click button to purchase
OS XL 7.5mm-22.5mm ZOOM no OSRXLZ75 £ 145.00 £ 6.00 24 hours

A premium zoom eyepiece of superior optical quality and craftsmanship. This high quality zoom eyepiece delivers a particularly flat field of view, exceptional contrast and excellent colour rendition. It is recommended for astronomical and terrestrial use as well as for Solar observing with an appropriate telescope. If you own a smaller Solar telescope like the Coronado PST then the smaller and lighter Opticstar XL 7.2mm-21.5mm ZOOM would also be worth considering.

The eyepiece provides an apparent field of view of 66°-42° and continuous focal lengths between 7.5mm and 22.5mm, this range particularly suits SCT type telescopes that will operate at their highest magnifications at around 7.5mm under reasonable conditions. When used in conjunction with a 2x barlow the eyepiece will reach the maximum possible magnification for a f4.8 Newtonian telescope thus making it very versatile with a variety of telescopes of different optical designs, focal lengths and focal ratios.

The excellent mechanical construction and finish when combined with a substantial eye relief of 18mm-19.5mm and an adjustable twist-type eye cup make these eyepieces very comfortable to use. In addition the eyepiece is parfocal and as such there is no need to refocus when changing magnifications.

The eyepiece’s advanced optical train consists of eight lenses in five separate groups, all optical surfaces are broadband fully multi-coated and all lenses feature blackened edges, the eyepiece also benefits from internal baffling. These features reduce internal reflections to an absolute minimum and help to significantly increase contrast.

The Eyepiece has a 1.25” nosepiece and is threaded for filters. It weighs 255 grams, measures 94mm tall (including the nosepiece) and has a 56mm maximum diameter.

Opticstar XL Zoom Eyepieces.
Opticstar XL Zoom Eyepieces shown with the Opticstar ED80S (f6.25) Gold - Dual Speed refractor.

We are constantly checking the accuracy of the technical data. We are prepared to provide more detailed information on request. Technical data is subject to change without notice.

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Opticstar News
New DS-616C XL+ Model
posted: 24th August 2017
Opticstar DS-616C XL+.
Star product, improved.

The new Opticstar DS-616C XL+ deep-sky CCD is the successor to the popular DS-616C XL that earned the annual star product award back in 2013. It maintains all the features of the original model as well as other improvements.

DS-616C XL is Astronomy Magazine's Star Product
posted: 12th September 2013
Opticstar DS-616C XL is Astronomy magazine's product of the year.
Star product.

The Opticstar DS-616C XL deep-sky CCD camera has earned the annual star product award from Astronomy, the world's best-selling astronomy magazine. Read about it in the September 2013 issue.

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updated: 18th June 2019
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