Crafted in Japan with a focus on astrophotography, this elite extender lens system transforms the R200SS parabolic mirror Newtonian reflector into an F5.6 astrograph. The Extender PH kit is specifically engineered to amplify the focal length by 1.4x, elevating the 800 mm (F4) R200SS Newton reflector to an impressive 1120 mm (F5.6). Its sophisticated optical configuration, comprising 4 elements in 3 groups, adeptly corrects coma aberration, ensuring images remain crisp from center to edge.
This extender casts a wide enough illumination to cover the field of a full-frame camera with a 44 mm image circle, making it ideal for comprehensive celestial photography. When paired with the eyepiece adapter, it allows for the use of a 31.7 mm eyepiece, facilitating both detailed astrophotography and enriching visual observations.
Employing the same anti-reflective AS coatings found on the premium VSD 100 f/3.8 astrograph, the Extender PH kit achieves an exceptional light transmission rate of 99.9% per lens surface. The interior's completely matte finish significantly reduces light loss, ghosting, and scattered light. Moreover, when utilized with the 50.8 mm eyepiece adapter, it doubles as a high-performance Barlow lens for visual observations, eradicating coma and aberrations across the entire field of view.
Key Features:
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Magnification: 1.4x, converting 800 mm (f4) to 1120 mm (f5.6).
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Optical Design: Employs AS coating for maximum light transmission of 99.9% per surface.
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Optical Structure: Hood elements include 3 groups and 4 elements.
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Image Circle: 44 mm, fully covering a 36x24 mm full-frame CCD.
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Components: Includes 1x PH extender, 1x Extension tube 66.
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Filter Compatibility: Features a 48 mm filter thread.
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Visual Observation Compatibility: Can be used with a 31.7 mm eyepiece when combined with an eyepiece adapter.
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Dimensions and Weight: Diameter 56 mm x Length 128 mm, with a net weight of 245 g.
Included in the Package:
- Extender PH
- EX Extender 66
- Dust Caps
This premium extender lens system is a quintessential addition for astrophotographers seeking to enhance their R200SS Newtonian reflector's capabilities, offering unparalleled clarity and flexibility for both photography and visual observation.
