User Manual for iOptron R90 90mm f 5.6 Doublet Refractor Telescope Click to enlarge the picture
Contents of the user manual for the iOptron R90 90mm f 5.6 Doublet
- Product category: Refractors iOptron
- Brand: iOptron
- 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 iOptron Refractors
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User manual for the iOptron R90 90mm f 5.6 Doublet 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 iOptron 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 iOptron 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 iOptron product will considerably shorten its lifespan!
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Product description The R90 90mm f/5.6 Doublet Refractor Telescope from iOptron features a doublet achromatic lens system with their proprietary anti-reflection fully multicoated optics to produce images with reduced chromatic and spherical aberrations for clear and bright images without distortion across the entire field of view, with true color rendition. This is a versatile optical tube assembly that can be employed as a simple grab-and-go primary telescope, or as a terrestrial spotting scope. It has a fast f/5.6 focal length which makes it ideal for astrophotography of the Moon, planets, or bright and large deep-sky objects.Two included eyepieces yield magnification of 20x and 50x, and the rack-and-pinion focuser accepts any other 1.25" eyepieces and accessories adding to its versatile nature. An included 45° erect-image diagonal corrects images horizontally and vertically when using the OTA as a spotting scope. The scope is offered without a mount or tripod, but an included Vixen-style dovetail plate makes it compatible with any alt-az or equatorial mount with a Vixen-style saddle. - Optical Performance
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- 90mm objective lens
- 500mm focal length
- Focal ratio: f/5.6
- Doublet refractor-style optical design
- Doublet achromatic lenses reduce chromatic and spherical aberrations for improved color rendition and without distortion across the entire field of view
- Anti-reflection fully multicoated optics reduce light loss
- Resolution power: 1.29 arc sec
- Two-speed 1.25" rack-and-pinion focuser
- Included Accessories
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- Eyepieces:
- 25mm eyepiece yields 20x power
- 10mm eyepiece yields 50x power
- Diagonal:
- 45° viewing angle
- Erect-image prism corrects image horizontally and vertically for terrestrial use
- Mounting
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- Vixen-style dovetail plate included
- User-supplied mount and tripod required
- Compatible with any alt-az or equatorial mount with a Vixen-style saddle
In the Box iOptron R90 90mm f/5.6 Doublet Refractor Telescope (OTA Only) - 25mm Eyepiece
- 10mm Eyepiece
- 45° Erect-Image Diagonal
- Frong Dust Cap
- Limited 1-Year Warranty
Table of Contents
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Technical parametersiOptron 8711 Specs | | | Optical Design | Achromatic Doublet Refractor | | Aperture | 90 mm / 3.5" | | Focal Length | 500 mm | | Focal Ratio | f/5.6 | | Eyepiece Barrel Diameter | 1.25" | | Diagonal | 45
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