optical telescope accessories

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

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