Reducer Lens .7x EdgeHD 9.25
$429.00
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Reducer Lens .7x EdgeHD 9.25
$429.00
0.7x Focal Speed
Cuts exposure time by half
43% Wider Field
Captures larger deep sky targets
4-Element Optics
Maintains native flat field quality
Lanthanum Glass
Delivers maximum contrast and clarity
Full Frame Support
Optimized for large image sensors
CNC Aluminum Body
Protects lenses with precision fit
In Stock
Sharper Astrophotography PerformanceFaster Speeds and Wider Deep-Sky Views
The Celestron Reducer Lens .7x EdgeHD 925 makes your 9.25-inch optical tube system one full F-stop faster than f/10, effectively cutting required exposure time in half. Engineered as a high-performance telescope focal reducer, this custom 4-element optical accessory expands your field of view by 43% to capture sweeping images of galaxies and nebulae with astounding clarity.
Precision Deep-Sky Optical SystemUncompromised Flat-Field Imaging Quality
Designed specifically to maintain the award-winning flat-field performance of the Celestron system, the Celestron Reducer Lens .7x EdgeHD 925 utilizes rare-earth Lanthanum glass elements to maximize contrast while virtually eliminating chromatic aberration. All air-to-glass lens surfaces feature premium multi-coatings for maximum light transmission, matched with blackened lens edges to reduce internal reflections.
Housed in a computer-assisted CNC machined aluminum body, it threads directly onto 3.25-inch rear threads to eliminate mechanical vignetting. With a generous 60mm aperture optimized for a 42mm image circle, this optical upgrade provides the generous back-focus needed to support full-frame sensors, Off-Axis Guiders, and existing T-Adapters.
Technical SpecificationsDetailed Lens and Mounting Specs
Product Type
Focal Reducer Lens
Compatible Telescope
Celestron EdgeHD 9.25"
Focal Reduction Factor
0.7x
Optical Layout
4-element optical design
Glass Type
Rare-earth Lanthanum glass
Lens Coating
Fully multi-coated
Clear Aperture
60mm
Optimized Image Circle
42mm
Housing Material
CNC machined aluminum
Thread Size
3.25 inch EdgeHD threads
Advanced Astrophotography FeaturesKey Highlights for Deep-Sky Imaging
Faster SpeedCuts camera exposure time by 50 percent
Wider FieldIncreases field of view by 43 percent
Flat-Field DesignRetains native edge-to-edge optical sharpness
Lanthanum ElementsExceptional color rendering and reduced aberration
Direct ThreadingMounts to 3.25-inch rear threads to prevent vignetting
Full Frame ReadyGenerous 42mm image circle supports large sensors
Rugged HousingCNC aluminum body includes threaded metal protective caps
Frequently Asked QuestionsEverything you need to know
What is the primary benefit of the Celestron Reducer Lens .7x EdgeHD 925?
The Celestron Reducer Lens .7x EdgeHD 925 speeds up your telescope optics by one full F-stop, cutting required exposure times by 50% while increasing your field of view by 43% for wide-field astrophotography.
Does the Celestron Reducer Lens .7x EdgeHD 925 reduce image quality at the edges?
No, the custom 4-element optical layout of the Celestron Reducer Lens .7x EdgeHD 925 is specifically engineered to preserve the flat-field, pin-point star performance across the entire focal plane.
How does the Celestron Reducer Lens .7x EdgeHD 925 attach to my telescope?
The Celestron Reducer Lens .7x EdgeHD 925 threads directly onto the native 3.25-inch threads on the back of the EdgeHD 9.25" optical tube assembly.
Can I use full-frame camera sensors with the Celestron Reducer Lens .7x EdgeHD 925?
Yes, it features a large 60mm clear aperture optimized for a generous 42mm image circle, making it fully compatible with large CCD and full-frame camera sensors.