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Focal Reducers & Field Flatteners
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Celestron 0.7x Edge HD Reducer Lens
BH # CER7XE1100 MFR # 94241
Key Features
- 0.7x Compression
- Fully Multicoated Optics
- 5-Element Design
- Increase Speed by 1.0 F-Stop
Top Seller
Celestron 0.7x Reducer Lens for EdgeHD 800 Telescope
BH # CERL8EHD MFR # 94242
Key Features
- For 8" EdgeHD Optical Tube
- 0.7x Focal Reduction, 43% Wider FOV
- Fully Multicoated Lanthanum Glass
- 105mm Back Focus Distance
Explore Scientific Field Flattener for f/5 to f/7 Refractors
BH # EXFIELDFLAT MFR # ES-FF2F5/F7
Top Seller
Celestron f/6.3 Reducer/Corrector
BH # CERC MFR # 94175
Key Features
- For 5-14" Catadioptric Scopes
- Widens Field of View
- Shortens Exposure Times
- Requires 93633-A Photo Adapter
Sky-Watcher Field Flattener for EvoGuide 50ED Guidescope
BH # SKS20214 MFR # S20214
Key Features
- Use Guidescope for Astrophotography
- T-2 Threads and 1.25" Holder
- 28mm Imaging Circle
- 17.5mm Back Focus
Explore Scientific 0.8X Focal Reducer for f/5 to f7 Refractors
BH # EXFR08X MFR # ES-FR0.8X
Starfield 1.0x Field Flattener (2")
BH # STSFFF10 MFR # SF-FF-10
Key Features
- Designed for Refractor OTAs
- Improves Astrophotography/Astro-Imaging
- Reduces Spherical Aberration
- 38mm Clear Aperture
Starfield Reducer & Field Flattener (.8x, 2")
BH # STSFFFR08 MFR # SF-FFR-08
Key Features
- For Refractors f/5.5 and Longer
- Reduces Focal Length for Faster Imaging
- Reduces Edge Spherical Aberrations
- High-Transmission Lens Multicoating
Available in other Styles, Configurations & Kits
Starfield Reducer & Field Flattener (.6x, 2")
BH # STSFFFR06 MFR # SF-FFR-06
Key Features
- For Refractors f/6 and Longer
- Reduces Focal Length for Faster Imaging
- Reduces Edge Spherical Aberrations
- High-Transmission Lens Multicoating
Available in other Styles, Configurations & Kits
Vixen Optics f/5.2 Focal Reducer for the ED81S, ED103S, & ED115S Scopes
BH # VIFRED81 MFR # ES3666
Key Features
- Reduces Focal Length by 0.67x
- Widens Viewing Field
- Shortens Exposures
- For Imaging Only
Starfield 0.8x Adjustable Reducer for 70-102mm Refractors (2")
BH # STSFFFRA08S MFR # SF-FFRA-08-S
Key Features
- Up to 17mm Adjustable Back Focus
- Doubles as Field Flattener
- 3 Lenses with ED Element
- Multicoated Lenses
Available in other Styles, Configurations & Kits
Starfield 0.8x Adjustable Reducer for 102-155mm Refractors (2.5")
BH # STSFFFRA08L MFR # SF-FFRA-08-L
Key Features
- Up to 17mm Adjustable Back Focus
- Doubles as Field Flattener
- 3 Lenses with ED Element
- Multicoated Lenses
Available in other Styles, Configurations & Kits
Starfield 1.0x Adjustable Field Flattener & Reducer (2")
BH # STSFFFA10 MFR # SF-FFA-10
Sky-Watcher 0.9x Reducer/Corrector for Evolux (62mm)
BH # SK09RFE62ED MFR # S20206
Key Features
- 62mm, f/5.8, 360mm Focal Length
- 55mm Back Focus
- 30mm Illuminated Field
- M56x1 Female & M48 Male Threads
DayStar Filters 0.5x Imaging Focal Reducer
BH # DAFR2DT MFR # FR2DT
Key Features
- Native 0.5x Focal Reducer
- 0.33x Reduction with 20mm Extension Tube
- Four-Element Lens Design in Two Groups
- Produces Wider Field of View for Imaging
Sky-Watcher 0.9x Focal Reducer / Flattener for Evolux 82 ED APO Refractor
BH # SK09RFE82ED MFR # S20207
Explore Scientific 3" Field Flattener/0.7x Focal Reducer
BH # EXFFFR507X00 MFR # FFFR507X-00
Key Features
- For Astrophotography/Astro-Imaging
- For 3" Focusers
- Corrects for Spherical Aberration
- Reduces the Focal Ratio by 0.7x
Sky-Watcher S20201 Reducer / Corrector
BH # SKRCP100 MFR # S20201
Key Features
- Designed for the PRO 100 ED APO
- Focal Length Reduction - 0.85x
- Provides Enhanced Field-edge Correction
Available in other Styles, Configurations & Kits
Alpine Astronomical Alan Gee Mark II Telecompressor
BH # ALAGII MFR # AGII
Key Features
- Designed for 8"+ SCT Optical Tubes
- Air-Spaced Doublet Achromatic Lenses
- 7-Layer Anti-Reflection Multi-Coated
- Widens and Flattens the Field of View
Tele Vue TRF-2008 0.8x Reducer
BH # TETRF2008 MFR # TRF-2008
Key Features
- Reduces Focal Length by 0.8x
- Widens Field & Shortens Exposures
- For Imaging Only
- Requires Camera-Specific T-Mount
Celestron 0.7x Focal Reducer Lens for EdgeHD 925 OTAs
BH # CE07RLEHD925 MFR # 94245
Key Features
- Reduces OTA Focal Ratio to f/7
- Drastically Reduces Exposure Time
- Fully Multi-Coated Lanthanum Glass
- Maintains EdgeHD Flat-Field Performance
Sky-Watcher 0.77x Focal Reducer / Flattener for EvoStar 150DX f/8 Refractor
BH # SKS20208 MFR # S20208
Key Features
- For Astrophotography/Astroimaging
- Virtually Eliminate Spherical Aberration
- Shortens Focal Ratio from f/8 to f/6.2
- Reduces Exposure Times by 66%
Available in other Styles, Configurations & Kits