Meade Series 4000 f/6.3 Focal Reducer/Field Flattener (4-element/41mm dia.) for CCD, Photographic, & Visual Applications.

Meade
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$99.95
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About Meade

Series 4000 f/6.3 Focal Reducer/Field Flattener: An important advancement in high-resolution focal reduction systems, the Meade 4-element, multi-coated f/6.3 Focal Reducer threads on to the rear cell of any Meade LX-Series mirror Focal lens telescope or to other Schmidt-Cassegrain telescope brands (followed by the Off-Axis Guider, shown, or T-Adapter) and reduces the telescope's focal ratio by a factor of 0.63: e.g., f/10 telescopes are converted to f/6.3.

Simultaneously, the 41mm-diameter lens system helps to flatten the field, significantly improving edge-of-field corrections. The f/6.3 Focal Reducer enables a reduction of photographic exposure times by about 50%, while producing an actual field diameter of 1.5" at the film plane.

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Reviewed by 1 customers

(1 of 4 customers found this review helpful)

 
4.0

ok

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from windsor ca.  -  Casual/ Recreational

didn't perform like i thought it would

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