Products
Vixen Flattener HD Kit for FL55SS
- $638.50
Upgrading the FL55SS to F5.7 Astrograph of high performance.
This kit consists of a high performance flattener lens and a connecing tube ring. It improves image quality of photography by achieving a flat focal plane and allows you to enjoy a high level of prime focus astrophotography. The flattener lens corrects aberration on the periphery of a photographic field of view and it keeps images of stars sharp throughout the photographic field.
Enquire for more information or email us specifics at sales@astro.com.sg.
Vixen Flattener HD Kit for FL55SS Description
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Sharp star images throughout a photographic field of full frame DSLR cameras.
The flattener HD for FL55SS improves off-axis image quality greatly with a minimum change of the focal length. It secures an image circle of 44mm that covers imaging sensors of full frame DSLR cameras.
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A minimum loss of light toward the edge of photographic field. A 96% of rich illuminated field of view is adequate for the full-size imaging sensors.
Generally astrophotographers are annoyed with the drop-off of light toward the edge of illuminated field of view when taking faint deep-sky objects with a telephoto lense or dedicated astrophoto instrument. Although this may be corrected by complicated image processing on a PC, it all depends on the image quality of an original photograph. The flattener HD kit solves this problem as it works to keep a large 96% illuminated field of view at the very edge of a 44mm image circle. You will feel no hint of light loss if used with a full frame DSLR camera. Astrophotography of nebulae and star clusters are fun with the flattener HD Kit.
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Illuminated field of view at the edge of photographic field.
96% with use of DSLR cameras with the full frame size of imaging sensors. 99% with use of DSLR cameras with the APS-C size of imaging sensors.
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Comparision in light loss between the FL55SS with the flattener HD lens and a standard telephoto lens or astrograph.
FL55SS with the flattener HD lens
Standard telephoto lens or astrograph
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Ultimate light transmission coatings for extremely high contrast images.
The same anti-reflection AS coatings that are used for our high-end VSD100F3.8 renowned for extremely high light transmission (99.9% per surface) are provided on each of the lens surfaces fo the flattener HD lens. Besides, elaborate matte-finishes are given to eliminate internal reflections and loss of light completely.
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Sample images "Veil Nebula"
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Setup configurations
Flattener HD Kit for FL55SS
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Applicable toFL55SS optical tube assembly
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Effective focal length300mm to 312mm
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Magnification1.04x
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Focal ratioF5.5 to F5.7
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Image circle44mm in diameter
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Illuminated field of view96%
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Optical construction2 elements in 1 group
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Optical coatingsAS coatings (More than 99.9% light transmission per surface)
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Dimensions58mm dia. x 30mm long
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Weight107 g
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EX Tube 66
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Dimensions68mm dia. x 76mm long
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Weight89 g