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Meade f/6.3 Series 4000 Focal Reducer/Field Flattener
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The Meade focal reducer screws onto the rear cell of SCT's, converting f/10 scopes to f/6.3 or f/6.3 scopes to f/4.
- Reduces photographic exposure times by approximately 50%.
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Meade Series 4000 f/6.3 Focal Reducer/Field Flattener: Threaded on to the telescope's rear cell, the f/6.3 Focal Reducer/Field Flattener 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 when the user desires a wider field of view, or 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%. 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. Meade Product Number: 07545
User Reviews
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Review Date: 7/18/2009
Reviewed By: douglas
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focus problem, deformed stars
I bought this reducer on november of 2007 at OPT, i agree with Mike. It can´t reach focus with a 2 OPT diagonal. Astrophotos always show deformed stars. I have tested with diferents distances between the Reducer and camera chip. |
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Review Date: 10/30/2008
Reviewed By: Mike Weasner
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Meade vs Antares comparison
I recently had the opportunity to compare the Meade f/6.3 Series 4000 Focal Reducer/Field Flattener with the Antares f/6.3 SCT Reducer/Corrector.
The Meade focal reducer comes in a small box. Inside the box is a bottle style case and a two-sided instruction sheet. Inside the case is the focal reducer with caps on both ends.
With a 2000mm focal length f/10 telescope like a 8 SC or 8 ACF, both the Antares reducer and the Meade reducer should yield a 1260mm focal length f/6.3 telescope. This makes the telescope a faster system with a wider field-of-view and brighter objects, requiring shorter exposure times when doing astrophotography.
I had some focusing problems with the Meade focal reducer on both an 8 LX90-ACF and an 8 LX200-ACF whether using eyepieces or my Nikon D70 DSLR camera. This surprised me, given that the Antares f/6.3 SCT Reducer/Corrector focused just fi... |
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