This listing is for a Meade Series 4000 f/6.3 Focal Reducer / Field Flattener. This reducer has the high quality blue layer deposition not the cheap Chinese green version. These are rare and hard to come by. Get it now while you have a chance. Part number # 07545. Perfect condition. Owned, but never used. Free shipping.
MEADE F/6.3 SERIES 4000 FOCAL REDUCER/FIELD FLATTENER
Threaded on to the telescope's rear cell, the f/6.3 Series 4000 Focal Reducer/Field Flattener by Meade reduces the main telescope's focal ratio by a factor of 0.63 (e.g. from f/10 to f/6.3). It can be used for visual work like wider fields of view. When placed in front of a CCD imager, #62 T-Adapter or Off-Axis Guider and camera body, the f/6.3 reducer produces photographic exposure times by about 50%!
FEATURES OF THE MEADE F/6.3 SERIES 4000 FOCAL REDUCER/FIELD FLATTENER
Designed primarily for f/10 and f/15 LX-series models, the Focal Reducer can also be used photographically and in CCD imaging applications with f/6.3 SCT's, resulting in an effective focal ratio of f/4. Please note that the backfocus of this piece is 85 mm.
Threads on to the rear cell of any LX90, LX200 or other Schmidt-Cassegrain or Advanced Coma-Free model and is typically used with an Off-Axis Guider or T-Adapter
Reduces the telescope's focal ratio by a factor of 0.63: f/10 telescopes are converted to f/6.3.
The 41 mm-diameter lens system helps flatten the field of Schmidt-Cassegrain models, significantly improving edge-of-field corrections.
Enables a reduction of photographic exposure times by about 50% while producing an actual field diameter of 1.5-inch at the film plane.
Use of this focal reducer is not recommended for 35 mm photography or larger CCD chips with Meade Advanced Coma-Free (ACF) models as field correction is not needed.
Filed under: Eyepieces & Accessories