User Manual for Vixen Optics ED81S 81mm f 8 Apochromatic Refractor Telescope Click to enlarge the picture
Contents of the user manual for the Vixen Optics ED81S 81mm f 8
- Product category: Refractors Vixen Optics
- Brand: Vixen Optics
- Description and content of package
- Technical information and basic settings
- Frequently asked questions – FAQ
- Troubleshooting (does not switch on, does not respond, error message, what do I do if...)
- Authorized service for Vixen Optics Refractors
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User manual for the Vixen Optics ED81S 81mm f 8 contain basic instructions
that need to be followed during installation and operation.
Before starting your appliance, the user manual should be read through carefully.
Follow all the safety instructions and warnings, and be guided by the given recommendations.
User manual is an integral part of any Vixen Optics product,
and if it is sold or transferred, they should be handed over jointly with the product.
Following the instructions for use is an essential prerequisite for protecting
health and property during use, as well as recognition of liability on the part of the manufacturer
for possible defects should you make a warranty claim. Download an official Vixen Optics user manual in which you will find instructions on how to install, use, maintain and service your product.
And do not forget – unsuitable use of a Vixen Optics product will considerably shorten its lifespan!
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Product description Vixen Optics' ED81S 81mm f/8 Apochromatic Refractor Telescope is an ideal optic for both celestial observation and astrophotography. Optically, it is designed with a fully multi-coated, apochromatic super-low dispersion (SD) lens system that corrects both spherical and chromatic aberrations. This correction creates a wide flat field of view without distortion and removes the blue-tinted "halo" effect and off-axis coma for true high-contrast color transmission. The optical tube assembly (OTA) is made and assembled in Japan to the high standards expected from such production.The scope can be used for multiple astrophotography techniques including prime-focus, afocal imaging, or eyepiece projection. A traditional rack-and-pinion focuser, with adapter rings, is employed to be able to handle the heavier loads of astrophotography rigs and can accept 1.25" eyepieces and accessories for making visual observations. Vixen includes a flip-mirror diagonal that allows the use of two different eyepieces for observational flexibility, or an eyepiece and imaging system that lets users simply flip the mirror to check alignment and tracking accuracy between exposures without having to touch the imager. While the OTA is offered here without a mount or tripod, a Vixen-style dovetail plate that fits on compatible saddles is included, along with a mounting ring assembly with an integrated carrying handle to make setup and breakdown easier. - Optical Performance
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- 81mm aperture
- f/8 focal ratio
- 625mm focal length
- Refractor optical system
- Anti-reflection multi-coated optics improve light transmission for brighter, high-contrast images
- Apochromatic lens configuration corrects for spherical and chromatic aberration to produce distortion-free images with accurate color representation
- Super-low dispersion (SD) glass elements correct for chromatic aberration to increase true color fidelity and improve contrast
- Resolution: 1.43 arcsec
- Sturdy rack-and-pinion with 50.8mm and 60mm mounting thread for imaging accessories and 1.25" eyepiece holder
- Red-dot finder with bracket
- Imaging
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- Dual 1.25" eyepiece holders
- Internal flip mirror allows the use of two eyepieces, or eyepiece/imaging combination
- Able to perform various astrophotography techniques including eyepiece projection, prime-focus, and afocal imaging
- When imaging, quickly flip mirror to check tracking between exposures without un-mounting imaging rig
- Back focus from rear edge of focuser body: 149.0mm
- Back focus with reducer from rear edge of reducer: 63.5m
- 60mm and 50.8mm T-threads on straight-through light path allow the use of optional camera-specific T-rings
- Mounting
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- OTA only, requires mount and tripod for proper use
- Includes a set of two mounting rings
- Integrated Vixen-style dovetail plate
- Integrated carrying handle makes setup and breakdown more safe and secure
- Weight: 5.1 pounds
In the Box Vixen Optics ED81S 81mm f/8 Apochromatic Refractor Telescope (OTA Only) Red-Dot Finderscope Flip-Mirror Diagonal Dovetail Mounting Plate Carrying Handle 2 x Tube Rings Limited 5-Year Warranty Table of Contents
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Technical parametersVixen Optics 26082 Specs | | | Optical Design | Refractor | | Aperture | 81 mm / 3.2" | | Focal Length | 625 mm | | Focal Ratio | f/7.7 | | Eyepiece Barrel Diameter | 1.25" | | Diagonal | 90
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