Sky-Watcher Focal Reducer & Corrector for EvoStar 80ED
Best optical upgrade for dedicated deep sky astrophotographers.
This essential optical tool shortens the focal length of your refractor, enabling faster imaging and a wider field of view. It simultaneously corrects edge distortion, ensuring your deep-sky captures remain sharp and clear across the entire sensor.
$229.99
at
Agena AstroProducts
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Who it's for
- Astrophotographers seeking professional-grade edge-to-edge clarity in their deep-sky images
- Deep-sky imagers looking to maximize efficiency during limited clear nights
- EvoStar 80ED owners wanting a reliable, custom-fit optical solution
Who should skip it
- Multi-scope users who prefer universal accessories for their gear collection
- Budget-conscious shoppers who dislike unexpected additional costs for essential parts
- Novice astronomers who find complex spacing requirements frustrating or difficult
Performance breakdown
Imaging Speed
The 0.85x reduction significantly cuts down exposure times for deep-sky targets.
Edge Sharpness
Effectively eliminates star distortion at the corners of your sensor frame.
System Compatibility
Precision-engineered specifically for the EvoStar 80ED optical train.
Field of View
Provides a wider, more forgiving frame for capturing expansive nebulae.
Build Quality
Robust metal construction ensures stability during long, multi-hour imaging sessions.
Ease of Integration
Simple to thread on, though back-focus spacing requires careful manual calibration.
Key Specs
Weight
0.7 lbs
Warranty
2 years
Compatibility
Pro 80 ED APO, EvoStar 80ED
Required Adapter
48mm T-Ring
Reduction Factor
0.85x
Back Focus
55mm
Thread Type
M48
Focal Ratio
f/6.3
Country of Manufacture
China
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