Focal Reducers & Field Flatteners

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Celestron 0.7x Focal Reducer Lens for EdgeHD 925 OTAs

Celestron 0.7x Focal Reducer Lens for EdgeHD 925 OTAs

B&H # 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
$42900
In Stock
Celestron 0.7x Reducer Lens for EdgeHD 800 Telescope

Celestron 0.7x Reducer Lens for EdgeHD 800 Telescope

B&H # 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
$40900
In Stock

Sky-Watcher S20201 Reducer / Corrector

B&H # SKRCP100 MFR # S20201
Key Features
  • Designed for the PRO 100 ED APO
  • Focal Length Reduction - 0.85x
  • Provides Enhanced Field-edge Correction
$31000
In Stock

Celestron f/6.3 Reducer/Corrector

B&H # CERC MFR # 94175
Key Features
  • For 5-14" Catadioptric Scopes
  • Widens Field of View
  • Shortens Exposure Times
  • Requires 93633-A Photo Adapter
$16900
In Stock

Sky-Watcher Field Flattener for EvoGuide 50ED Guidescope

B&H # SKS20214 MFR # S20214
Key Features
  • Use Guidescope for Astrophotography
  • T-2 Threads and 1.25" Holder
  • 28mm Imaging Circle
  • 17.5mm Back Focus
$8849
In Stock

Explore Scientific Field Flattener for f/5 to f/7 Refractors

B&H # EXFIELDFLAT MFR # ES-FF2F5/F7
Key Features
  • Corrects Coma Aberration for Photography
$14999
In Stock

Sky-Watcher Reducer/Corrector Adapter for Evostar 72ED

B&H # SKE72EDRCA MFR # S20210
Key Features
  • For 0.85x Reducer/Correctors
  • Installs onto Evostar 72ED OTA
  • Adapter Only
$2800
In Stock

Sky-Watcher 0.85x Focal Reducer/Flattener for EvoStar 72ED f/5.8 Refractor Guidescope

B&H # SKS20212 MFR # S20212
Key Features
  • For Astrophotography/Astroimaging
  • Virtually Eliminate Spherical Aberration
  • Shortens Focal Ratio from f/5.8 to f/4.9
  • Reduces Exposure Times by 38%
$35900
In Stock

Sky-Watcher 0.77x Focal Reducer / Flattener for Esprit 120 ED APO f/7 Refractor

B&H # SKS20209 MFR # S20209
Key Features
  • For Astrophotography/Astroimaging
  • Virtually Eliminate Spherical Aberration
  • Shortens Focal Ratio from f/7 to f/5.4
  • Reduces Exposure Times by 68%
$45000
In Stock

Explore Scientific 3" Field Flattener/0.7x Focal Reducer

B&H # EXFFFR507X00 MFR # FFFR507X-00
Key Features
  • For Astrophotography/Astro-Imaging
  • For 3" Focusers
  • Corrects for Spherical Aberration
  • Reduces the Focal Ratio by 0.7x
$47999
In Stock

Tele Vue 0.8x Reducer for NP101is and NP127is Telescopes

B&H # TENPR2073 MFR # NPR-2073
Key Features
  • Reduces Focal Length by 20%
  • Minimizes Full-Frame Sensor Vignetting
  • Increases Field of View by 25%
  • Threaded for Tele Vue Imaging System
$49500
In Stock

Vixen Optics f/6.4 Focal Reducer for VC200L

B&H # VIFEVC200L MFR # ES37229
Key Features
  • Use for Long Exposure Astrophotography
  • Reduces Focal Ratio from f/9 to f/6.4
  • Fits VC200L Reflector Telescope
  • Decreases Exposure Time
$20899
Special Order
Expected availability: 7-14 business days

Vixen Optics f/5.2 Focal Reducer for the ED81S, ED103S, & ED115S Scopes

B&H # VIFRED81 MFR # ES3666
Key Features
  • Reduces Focal Length by 0.67x
  • Widens Viewing Field
  • Shortens Exposures
  • For Imaging Only
$21799
In Stock

Vixen Optics Focal Reducer HD for AX103S & VC200L Telescopes

B&H # VIREDHD MFR # ES37247
Key Features
  • Use for Long Exposure Astrophotography
  • Reduces Focal Ratio
  • Fits VC200L Reflector, AX103S Refractor
  • Decreases Exposure Time
$24399
Special Order
Expected availability: 3-5 weeks

Vixen Optics SD Flattener HD Kit

B&H # VISDFHDK MFR # ES37246
$26799
Special Order
Expected availability: 3-5 weeks
$26900
Reg. $385.00
Save $116.00
Temporarily Out of Stock
Expected availability: Mar 08, 2024

Sky-Watcher 0.9x Reducer/Corrector for Evolux (62mm)

B&H # SK09RFE62ED MFR # S20206
Key Features
  • 62mm, f/5.8, 360mm Focal Length
  • 55mm Back Focus
  • 30mm Illuminated Field
  • M56x1 Female & M48 Male Threads
$26900
Reg. $375.00
Save $106.00
In Stock

Alpine Astronomical Alan Gee Mark II Telecompressor

B&H # 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
$27500
In Stock

DayStar Filters 0.5x Imaging Focal Reducer

B&H # 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
$28500
Special Order
Expected availability: 2-4 weeks

Vixen Optics 0.62x Focal Reducer for the VMC200L & VMC260L Telescopes

B&H # VIFRVMC200L MFR # ES3871
Key Features
  • Reduces Focal Length by 0.62x
  • Widens Viewing Field
  • Shortens Exposures
  • For Imaging Only
$29999
Special Order
Expected availability: 7-14 business days
$30000
Special Order
Expected availability: 2-4 weeks

Vixen Optics ED80sf Focal Reducer for Sony Alpha

B&H # VIFRED80SFS MFR # ES37233
Key Features
  • Designed for Sony Alpha DSLRs
  • 0.85x Focal Length Reduction
$30999
Special Order
Expected availability: 7-14 business days

Vixen Optics ED80sf Focal Reducer for Nikon

B&H # VIFRED80SFN MFR # ES37231
Key Features
  • Designed for Nikon DSLRs
  • 0.85x Focal Length Reduction
$30999
Special Order
Expected availability: 7-14 business days

Tele Vue TRF-2008 0.8x Reducer

B&H # TETRF2008 MFR # TRF-2008
Key Features
  • Reduces Focal Length by 0.8x
  • Widens Field & Shortens Exposures
  • For Imaging Only
  • Requires Camera-Specific T-Mount
$35300
Temporarily Out of Stock

Sky-Watcher 0.85x Focal Reducer/Corrector for ED80 Telescope

B&H # SKFRFP80 MFR # S20200
Key Features
  • Reduces the Focal Length by 0.85x
  • Reduces Distortion at the FoV Edges
  • Use with Select T-Ring Adapters
$37000
Temporarily Out of Stock

Sky-Watcher S20202 Reducer / Corrector

B&H # SKRCP120 MFR # S20202
Key Features
  • Designed for the PRO 120 ED APO
  • Focal Length Reduction - 0.85x
  • Provides Enhanced Field-edge Correction
$39500
Temporarily Out of Stock
Other Buying Options

Tele Vue 0.8x Photographic Field Reducer and Flattener

B&H # TERF102 MFR # RFL-4087
Key Features
  • Reduces Focal Length by 20%
  • Widens Field & Shortens Exposure Time
  • Eliminates Lens Curvature
  • Requires Camera-Specific T-Mount
$39000
In Stock

Vixen Optics f/5.7 Field Flattener HD Kit for FL55SS Telescope

B&H # VIFHDKIT MFR # ES37252
Key Features
  • Improves Astrophotography/Astro-Imaging
  • Reduces Edge Spherical Aberrations
  • High-Transmission Multi-Coating
  • 44mm Diameter Imaging Circle
$39099
Special Order
Expected availability: 6-8 weeks
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