Reducers - Correctors

2" / 1¼" Economy-Reducer suitable for 2" focusers and clamps ...

0.5x focal reduction - 1.25" - for observation & photography...

0.5x Reducer - 2" - for visual observation & photography - focal reduction...

Superb quality, non-focal reducing Field Flattener optimised for DSLR imaging on refractor telescopes with focal ratio...

The corrector is suitable for ED, apochromatic or achromatic refractors from 70 mm aperture to 102 mm aperture. It corre...

This combination focal reducer and field corrector lens accessory works with all Celestron 5", 6", 8", 9 1/4", 11" and 1...

The Multi Purpose Coma Corrector Mark III eliminates coma across the full photographic field without manipulating the fo...

The Flattener corrects the field of view and illuminates it up to full format cameras...

Although the Takahashi FSQ-85EDX is designed as a Petzval quadruplet, the full-format sensor coverage was not perfect an...

This optically matched Reducer/Flattener effectively reduces the telescope’s focal length by 0.92x and improves field-ed...

Coma corrector for Newton telescopes that neither reduces the focal length nor the image field of your telescope...

Optimized for all Sky-Watcher fast-ratio f/5 Newtonian Reflectors /Dobsonians, with 2” focuser. Delivers stunning wide-f...

The Flattener corrects the field of view and illuminates it up to full format cameras...

Μειωτής εστιακού λόγου 0.67x της Astro-Physics (USA) 2"...

ZWO has released a brand-new FF65APO 0.75× full frame reducer with a four-element optical design. It has a reduction fac...

This superb quality accessory effectively reduces the telescope's focal length by a factor of 0.85x and provides much im...

This superb quality accessory effectively reduces the telescope's focal length by a factor of 0.85x and provides much im...

​Optically matched to the Skymax-200DX Maksutov-Cassegrain, the two-lens Focal Reducer/Flattener has a reduction factor...

This optically matched Reducer/Flattener effectively reduces the telescope’s focal length by 0.77x (enabling astrophotog...

ZWO has also released a new 3-inch FF80APO 0.76X full frame reducer with a three-element optical design, including one e...