Flattener / Reducer / Correctors

The 4" corrector and reducer is designed for the large 180mm f/7 Triplet APO and allows astrophotography with full frame cameras at the highest level.

• Improves the focal ratio from f/7 to f/5.6 and reduces the focal length of the apo to 1008 mm
• Full illumination and correction up to full frame
• Working distance is 55 mm from the M48 connection thread
• The corrector is screwed to the focuser of the apo

Focal length reducer for VSD90ss and VSD70ss with two ED lenses for high-end astrophotography and an illumination of 44 mm for full-frame cameras

• Elaborately designed focal length reducer for the VSD90ss/VSD70ss
• Suitable for a 24x36 full format camera
• Four lens elements in four groups for exceptionally sharp star images
• Guarantees a large illumination of the image field up to 44 mm
• Very sharp stars up to the edge of the field of view
• The VSD90ss thus allows extremely short exposure times
• High-quality standard ‘Made in Japan’
• Reduces the focal ratio of the VSD90ss from f5.5 to f3.9
• Dimensions: 92 mm diameter x 59.2 mm length / Weight: 589 g

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

• Optimized for full-frame photography
• Variable adjustable distance to chip
• No focal length change
• M48 filter thread

The Askar 0,8x Reducer - corrector for the 160 mm f/7 triplet apo turns the 140 mm apo into a fast astrograph.

• designed for the Askar 160APO
• brings the focal ratio down to f/5.6
• suitable for full frame cameras

The 3" Photoline 0.8x reducer and corrector is optimized for full frame cameras and suitable for all apos from 102mm aperture - with integrated fine tuning for optimal working distance.

• Optimally suited for large sensors (full frame and larger)
• Connection thread on the telescope side is M92x1 male thread - adapters for focusers from 3" are available
• The distance from the corrector to the camera is precisely adjustable with the camera connected for optimal field sharpness - Position is fixable
• Triplet design with improved color correction - Special glass from Ohara (Japan)
• Camera connection via M48x0.75 adapter with integrated female thread for 2" filter
• Additional M54x0.75 thread for larger camera sensors - prevents vignetting due to M48
• High-quality multi-coating, internal blackening and anti-reflective thread prevent reflections and ghost images
• Dust caps for screwing on the M92 thread and M48 thread are included in the scope of delivery

The Askar 1.0x corrector for the 160 mm f/7 triplet apo provides a very good image quality across the entire field of view.

• developed for the Askar 160APO
• provides very good image quality across the entire field of view
• suitable for full-frame cameras

The Askar 0,8x Reducer - Corrector for the 185mm f7 Triplet APO turns the 185 mm APO into a fast Astrograph.

• designed for the Askar 185APO
• brings the focal ratio down to f5.6
• suitable for full frame cameras

This reducer effectively shortens the exposure time and significantly increases the field of view.

• Designed for the Askar 103APO
• Reduces the focal length by a factor of 0.6
• Screwed to the focuser
• Camera-side threads M68x1, M54x0.75 and M48x0.75
• 55 mm backfocus from M48 thread

3" 0.7x Reducer/corrector

The Askar 1.0x corrector for the 185mm f7 Triplet APO provides a very good image quality across the entire field of view.

• developed for the Askar 185APO
• provides very good image quality across the entire field of view
• suitable for full-frame cameras

The Askar 1.0x corrector for the 140mm f7 Triplet APO provides a very good image quality across the entire field of view.

• developed for the Askar 140APO
• provides very good image quality across the entire field of view
• suitable for full-frame cameras

The Askar 0,8x Reducer - Corrector for the 140mm f7 Triplet APO turns the 140 mm APO into a fast Astrograph.

• designed for the Askar 140APO
• brings the focal ratio down to f5.6
• suitable for full frame cameras

The TS Photoline 1.0x full-frame flattener corrects the field of view of refractor telescopes and allows astrophotography with perfect edge sharpness

• Full illumination and correction of the image field up to 55 mm sensor diameter
• Factor 1.0x, the focal length remains unchanged.
• Suitable for all refractor telescopes with focusers from 2.5" upwards
• No reflections and ghost images due to high quality coating and anti-reflection thread
• Connections at the telescope side M68x1 male thread and M63x1 male thread (reducing adapter)
• Connections at the camera side M48x0.75 male thread with adaption for 2" filter
• Practical working distance of 55 mm from M48 thread (can be extended to 88 mm)
• Refractors require a working distance of at least 145 mm from the M68 or M63 female thread.