Description
The Celestron 7X Edgehd 1400 Focal Reducer Lens is a premium reducer designed to maintain the flat-field performance of the EdgeHD optical system. It features a custom 5-element optical design, exotic Lanthanum elements, and large diameter lens elements to provide a large image circle for use with large CCD sensors. It also has fastar compatibility and .7x reducer for increased field of view.
Celestron's new EdgeHD reducers feature a custom 5 element optical
design engineered to maintain the flat-field performance of our award
winning EdgeHD optical system. Unlike generic reducers, our
premium reducers provide substantial back focus to accommodate an
assortment of imaging accessories.
EdgeHD reducers offer high index optical elements, including extra low
dispersion, exotic Lanthanum elements, which provide high contrast
viewing while minimizing chromatic aberration. All air to glass
lens surfaces feature multiple layers of coating for maximum light
transmission and color correction and contain blacken edges to minimize
internal reflection and maximize image contrast. Large diameter
lens elements, up to 60 mm clear aperture, ensure that the optimized
image circle remains at a generous 42 mm for use with large CCD
sensors.
Incorporating computer assisted CNC machined aluminum housing, for
precise spacing and alignment of optical elements, and threaded metal
covers on the lens assembly to protect your investment from dust and
scratches, our reducers offer you an outstanding mechanical design.
With the fastar option on all EdgeHD optical systems, coupled with the
.7x reducer, your telescope becomes the most complete imaging system
available in its price range today.
Performance
Design: 5-element optical layout designed specifically for the
EdgeHD14 to maintain the flat-field performance of the Edge HD optical
design
Maintains the same back focus as when used at F/11: Unlike generic
reducers the EdgeHD .7x provides generous back focus to accommodate
additional accessories and a wide variety of cameras. Also allows use
of existing EdgeHD T-adapters and other Celestron imaging accessories
One full F-Stop faster than f/11: Reduces the exposure time by one-half
to capture the same brightness of object
Increase field of view by 43%: Better for capturing wide field images
of larger galaxies and nebulae
Glass
Lanthanum Glass Elements: EdgeHD reducer uses rare earth Lanthanum
glass elements for clear, high contrast viewing while minimizing
chromatic aberration
Fully multi-coated lens elements: All air-to-glass surfaces have
multiple layers of coating for maximum light transmission and color
correction
Blacken edges: All lens elements have blacken edges to minimize
internal reflection and maximize contrast
Full Frame Design
Threads directly onto the 3.25 threads of the EdgeHD optical tube:
Reduces mechanical vignetting and allows for use with larger (full
frame) sensors and Off-Axis Guiders
Clear aperture: 60mm clear aperture lens optimized for a 42 mm image
circle for use with large CCD sensors.
Mechanical Design
Machined aluminum housing: Computer assisted CNC machined aluminum
housing for precise spacing and alignment of the optical elements.
Threaded metal covers for both ends of the lens assembly: To protect
your investment from unwanted dust and scratches.
Versatility
Fastar compatibility and f/2 imaging with optional accessory: the
EdgeHD is the most complete imaging system in its price range.
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