Askar 0.75x reducer for 71F extras opinie

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The Askar 0.75x (71F) reducer was developed as a dedicated accessory for the Askar 71F astrograph. It guarantees excellent field correction, making it ideal for professional cameras and camcorders equipped with a full-frame matrix.

This reducer reduces the focal length by a factor of 0.75x, which in the case of the Askar 71F astrograph gives a value of 369 mm at f/5.2. Such parameters allow not only to take breathtaking photos in a wide field of view, but above all to significantly shorten the exposure time.

This device allows for the mounting of 2" diameter filters, screwed into the M48x0.75 thread located on the camera side.

Key Features of the Askar 0.75x (71F) Reducer

• focal reducer dedicated to the Askar Askar 71F astrograph, compatible with full-frame cameras and cameras
• 0.75x multiplier giving an effective focal length of 369 mm at f/5.2
• can be used with 2" diameter filters
• 55mm back focus

Technical parameters

• optical design: triplet
• multiplicity: 0.75x
• compatibility: Askar 71F
• focal length without reducer: 490 mm
• focal length with reducer: 369 mm
• aperture without reducer: f/6.9
• aperture with reducer: f/5.2
• diameter of the full illumination disc: 44 mm
• rear thread (camera side): M59x1
• front thread (from the extractor side): M59x1
• possibility of installing a filter: yes, 2"
• backfocus: 55mm
• total length: 48 mm
• weight: 230 g

Set components

• Askar 0.75x reducer (71F)

Guarantee

24 months