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Askar 3" f/3.9 Full Frame Reducer for FRA600 - FRA600-RED 11" Telescopes Moon map and legend: Helps

Askar 3" f/3.9 Full Frame Reducer for FRA600 - FRA600-RED 11" Telescopes Moon map and legend: HelpsThe Askar f 3. 9 full frame 3" reducer features a 4 element optical design specifically for the FRA600 Quad Astrograph. It offers 0. 7X focal ratio reduction in focal ratio to shorten exposure times and effectively widen the field of view. Back focus is 55 mm. The FRA600 Reducer has built in M48X0. 75 filter threads.

SKU: 95155674441 · From clintoncounty708.com

4.5
USD307.00 USD354.00

Pay in 4 interest-free payments of $76.75 Learn more

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Ships within 48 hours · Estimated delivery Aug 7 - Aug 12

Description

Moon map and legend: Helps you to familiarize yourself with the Moon

you can use this filter in its place to produce the proper back focus of 55 mm

measurable with the optional Digital Micrometer Kit to better than 1/10

which travel at a slightly different rate than the stars

Askar 3" f/3.9 Full Frame Reducer for FRA600 - FRA600-RED 11" Telescopes Moon map and legend: HelpsThe Askar f 3. 9 full frame 3" reducer features a 4 element optical design specifically for the FRA600 Quad Astrograph. It offers 0. 7X focal ratio reduction in focal ratio to shorten exposure times and effectively widen the field of view. Back focus is 55 mm. The FRA600 Reducer has built in M48X0. 75 filter threads.

Exchange/Return Notes
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  • Final sale items are not eligible for returns or exchanges.
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