Celestron Reducer 0.7x EdgeHD 1100

Celestron Reducer 0.7x EdgeHD 1100

Optics specially designed for the EdgeHD telescopes with five optical elements (including glass with lanthanum), while maintaining the flat field of view of the EdgeHD optics.
Can be connected to any DSLR camera and all known CCD cameras with filter wheels and (AO) active optics systems and off-axis guiding adapters
The 0.7x EdgeHD reducers contain extreme refractive index lenses, including very low dispersion lanthanum lenses. As a result, the particularly high contrast of the EdgeHD optics remains undiminished despite the many additional lenses, and there is no chromatic aberration over a very wide spectral range.
Each glass air surface in this lens system is multi-coated for maximum transmission and color fidelity. All lens edges are carefully blackened to ensure that
The large lenses with up to 60mm diameter allow a fully illuminated image circle with 42mm diameter - suitable also for large CCD sensors.
The intricate CNC-machined aluminum housing ensures precise lens spacing and alignment. Metal screw caps protect the lenses from dust and damage
F/7 full-frame - for all Celestron Edge-HD optics

Celestron's new EdgeHD reducers offer optics specifically calculated for the EdgeHD telescopes with five optical elements (including glass with lanthanum), while maintaining the flat field of view of the EdgeHD optics.
Unlike simpler reducers for the APS format, Edge-HD reducers do not shorten the original backfocus of 146 mm. This means that not only any DSLR camera can be connected, but also all known CCD cameras with filter wheels and (AO) active optics systems and off-axis guiding adapters.

The 0.7x EdgeHD reducers contain extreme refractive index lenses, including lenses made of glass with very low dispersion lanthanum. As a result, the particularly high contrast of the Edge HD optics remains undiminished despite the many additional lenses, and there is no chromatic aberration over a very wide spectral range.

Each glass air surface in this lens system is multi-coated for maximum transmission and color fidelity. All lens edges are carefully blackened to completely suppress internal reflections. The large lenses with up to 60mm diameter allow a fully illuminated image circle with 42mm diameter - suitable also for large CCD sensors.

The elaborate CNC-machined aluminum housing ensures exact spacing and alignment of the lenses. Metal screw caps protect the lenses from dust and damage when the Edge HD Reducer is not in use.

Together with the f/2 HyperStar option and the f/7 Edge-HD Reducer, the f/10 Celestron EdgeHD Schmidt-Cassegrain optic becomes by far the most versatile telescope in its price range.

Data:
Design: five-lens reducer that maintains the flat field of view of Edge HD telescopes.
Same backfocus as f/10: Unlike universal standard reducers, the EdgeHD 0.7x reducer retains the 146mm(C11/C14 Edge-HD) backfocus, allowing additional accessories and a variety of cameras to be used. Existing EdgeHD-T adapters and all existing Celestron accessories can be used unchanged together with the reducer.
A full f-stop faster than f/10: Reduces exposure time by half for the same image brightness.
Enlarges the field of view by 43%: Best suited for large field images, e.g., of large-area galaxies and nebulae.

Glass
Lanthanum glass elements: In the EdgeHD reducers, glass lanthanum lenses enable clear, high-contrast images with minimal chromatic aberration.
Fully multi-coated lenses: All glass air surfaces are multi-coated for maximum light transmission and color fidelity
Blackened lens edges: all lenses have blackened edges to eliminate internal reflections and increase contrast
Full-frame design
Connects to the 3.25" thread of EdgeHD telescopes: Reduces mechanical vignetting and allows the use of larger (full-frame) sensors and off-axis guiders
Free aperture: Lenses with up to 60mm free aperture are optimized for an image circle of 42mm diameter - ideal also for larger CCD sensors.
Mechanics
Aluminum housing: CNC-machined aluminum housing for precise lens spacing and alignment.
Metal screw cap for both ends of the reducer: protects optics from dust and scratches.
Features:
The EdgeHD 0.7x Reducer makes your EdgeHD 1100 Schmidt-Cassergrain, for example, a full f-stop faster than f/10, halving the exposure time that would be required to achieve the same image brightness
Optics with five lens elements
Delivers a flat image comparable to the original EdgeHD optics

Increases the field of view by 43
Bolts directly to the 3.25" thread of the EdgeHD, reducing mechanical vignetting and allowing the use of larger (full-frame) sensors and off-axis guiders.
Provides the same backfocus at f/10, which means ample room for modern optical accessories and a wide variety of cameras
Allows use of existing EdgeHD T-adapters with or without Edge-HD reducer
Manufacturer Celestron
Item number (#) 825268
EAN Code 4047825028327
Net weight (kg) 1.70
Design 5-element
Focal length reduction .7 x
Coating Fully multi-coated
Backfocus 146 mm (5.75 in)