Sky-Watcher Evostar Reducer/Flattener
Best optical corrector for amateur astrophotographers seeking sharp wide field images.
This essential optical accessory transforms a standard refractor into a more capable astrophotography instrument. By flattening the field and reducing the focal ratio, it delivers sharper stars across the entire frame while significantly cutting down on required exposure times.
$415.00
at
Telescopes.net
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Who it's for
- Astrophotographers seeking professional edge-to-edge clarity in their deep-sky images
- Deep-sky imagers wanting to capture more light in less time
- Evostar refractor owners looking for a seamless and reliable optical upgrade
Who should skip it
- Multi-telescope users who prefer universal equipment for their imaging rigs
- Beginners who want a simple plug-and-play solution without extra measurements
- Mobile astronomers using lightweight mounts near their maximum payload capacity
Performance breakdown
Imaging Speed
Significant focal reduction drastically cuts down your total integration time.
Field Flatness
Corrects edge distortion effectively for crisp, pinpoint stars across the frame.
Sensor Versatility
Handles both APS-C and full-frame sensors with impressive optical consistency.
Integration Ease
Standard 55mm back focus makes connecting your imaging train straightforward.
Optical Clarity
High-quality coatings maintain excellent light transmission and contrast during sessions.
Build Precision
Robust construction ensures reliable alignment for demanding deep-sky photography.
Key Specs
Focal Length
355 mm
Focal Ratio
4.93
Magnification Factor
0.85x
Back Focus Distance
55 mm
Lens Coating
StarBright XLT
Compatibility
EvoStar 72ED Refractor
Sensor Compatibility
APS-C and Full Frame
Dimensions
65mm x 65mm x 50mm
Warranty
Limited 2-Year Manufacturer Warranty
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