Bresser Vixen Flattener HD Field Flattener Kit Compatible with FL55SS Telescopes

Converts The Fl55Ss Into A High-Performance Astrograph The Kit Consists Of A High-Performance Flattener Lens, A Reducer And The Ex Tube 66 Connection Ring, Which Was Developed For The Fl55Ss Fluorite Apochromatic Refractor And Improves Photographic Performance By Dramatically Flattening The Surface.

Ultra-Sharp Image Over The Entire Field Of View Of The Dslr Full-Frame Sensor
The Flattener Hd For The Fl55Ss Reduces The Change In The Focal Length Of The Fl55Ss To A Minimum And Improves The Evenness Of The Surface For Prime-Focus Photography. The 44 Mm Image Circle Covers The Entire Field Of View Of A Full-Frame Dslr Camera. When Used In Combination With The Hd5.5 Reducer, The Focal Length Is Reduced By 0.79X (From F5.5 To F4.3) And The Image Circle Retains A Diameter Of 44 Mm, Which Significantly Improves The Sharpness Across The Entire Field Of View Of Dslr Cameras With A Full-Frame Sensor.

96% Light Volume To The Edge Of The Field Of View
The Flattener Hd Was Specially Developed For The Fl55Ss Refractor To Reduce Loss Of Light To A Minimum Across The Entire 44 Mm Image Circle Of Full-Frame Dslr Cameras.

Exceptionally High Contrast
The Same Anti-Reflective As Coatings Used On Our High-End Vsd 100 F/3.8 Astrograph Are Used To Provide An Outstanding Light Transmission Of 99.9% Per Lens Surface. Thanks To The Matte Black Surface Of The Reducer Hd Kit, Loss Of Light, Ghosting And Scattered Light And Largely Prevented.

Features

• Ultra-Sharp Image Over The Entire Field Of View
• Designed For Full-Frame Cameras
• Illuminates 44 Mm Image Circle
• Cutting-Edge As Coating

• Flattener Hd Kit For Fl55Ss
• 66 Mm Extension Tube
• Dust Caps