Optical Accessories
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On the evening of August 12, 2026, an extraordinary celestial event is on the horizon: A total solar eclipse will pass over parts of Europe—though not over Germany.
Here in Germany, we will experience an impressive partial eclipse, which will nonetheless offer a rare and spectacular sight. Germany will be entirely within the Moon’s penumbra. As a result, the sun will not be completely, but clearly and visibly “nibbled away.”
What do you need to safely observe the solar eclipse? You can find a list 👉 here!
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Optical Accessories
Everything you need of optics for visual and photographic work or accessories for DIY projects, can be found in these categories.
Compact 50 mm f/4 guide scope with 1.25" connector - can be mounted on your telescope instead of the finder - perfectly suitable for ZWO mini autoguider and similar ones
- Aperture 50 mm
- Focal length 200 mm
- Weight only 520 grams
- Camera side connection 1.25" - clamping by Rotolock - clamped as screwed
- Sharpness adjustment by turning the objective - with lock ring
- Adjustable working distance of 0-15 mm behind the eyepiece clamp - suitable for all autoguiders with 1.25" body, such as ASI120 Mini
- Easy connection to the telescope instead of the finder, suitable for Skywatcher, TS-Optics, GSO, Vixen, Celestron, etc.
New ! Adjustable Flat61 for William Optics ZS61 II Telescopes
- Compensates for field curvature and enables sharp images at the edges
- Camera can be mounted directly with M48 camera adapter
- Suitable for refractors from f/5 to f/7
- Distance to chip plane is variably adjustable
Perfect astrophotography: Whether you are an experienced astrophotographer or an enthusiastic beginner - with this Reducer Flattener you can take impressive pictures with ease.
A valuable addition for the large refractors from William Optics
- Image correction right to the edge
- Reduction factor 0.72x
- M92 threaded connection to the telescope
- Universal connection with M48 to camera or filter wheels etc.
- Very high quality workmanship
Perfect optics with FPL53 glass and exemplary mechanical design.
- Very high quality optics
- Universal use (as a guider or astrophotographic telescope)
- Compatible with Flattener 61
- Usable as guider with 360mm focal length for primary optics with focal lengths between 700mm and 1200mm
This Reducer Flattener is designed to take the optical performance of your telescope to a new level. With a reduction factor of X0.8 and an outstanding flattener function, it minimizes distortions and aberrations that can occur during observation and photography.
The 0.8x Flattener corrector from William Optics is optimized for full-frame format and suitable for all apos from 102mm aperture with large extensions.
- Connection thread on the telescope side M92x1 - adapters to M68 or M54 are optionally available
- The distance is precisely adjustable, so the corrector can be individually
- optimized to the refractor for best possible stars
- Triplet design with Ohara glass (Japan)
- M48x0.75 camera mount with possibility to screw in 2" filter
