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User Manual for Sky-Watcher 7.5" f 5.3 Maksutov-Newtonian Telescope Click to enlarge the picture
Contents of the user manual for the Sky-Watcher 7.5" f 5.3 Maksutov-Newtonian Telescope
- Product category: Reflectors Sky-Watcher
- Brand: Sky-Watcher
- 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 Sky-Watcher Reflectors
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User manual for the Sky-Watcher 7.5" f 5.3 Maksutov-Newtonian Telescope 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 Sky-Watcher 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 Sky-Watcher 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 Sky-Watcher product will considerably shorten its lifespan!
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Product description Sky-Watcher's 7.5" f/5.3 Maksutov-Newtonian Telescope features a hybrid optical path that combines the parabolic mirror of a Newtonian with the front corrector plate of a Maksutov to create an optic that corrects for spherical and chromatic aberrations, and comas across the entire field of view. An added benefit of the front corrector plate is that the secondary mirror can be attached to it, removing the struts and supports found in traditional Newtonians and eliminating the diffraction spikes they cause which can degrade the image. The resulting views through the scope are bright and clear with virtually no distortion across the entire field of view with true color rendition.The scope is equipped with a 2" Crayford-style focuser, instead of the more common rack-and-pinion, which uses a steel rod held tightly against the drawtube to provide a toothless friction system that eliminates backlash and enables ultra-fine, precision focusing with its 10:1 reduction micro-focusing knob. Employing a 2" drawtube allows the use of larger eyepieces and accessories.While there is no mount included, a cradle-ring assembly is provided. It clamps over the optical tube and lets the user adjust the orientation and position of the scope relative to the mount to optimize viewing comfort and balancing, while avoiding interference with other equipment. A stainless steel Vixen-style dovetail plate makes it compatible with any alt-az or equatorial mount with a Vixen-style saddle, and a 1/4"-20 stud on the top of the cradle ring assembly enables a camera to be piggybacked onto the scope for wide-field photography. - Optical Performance
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- 7.5" (190mm) aperture
- f/5.3 focal ratio
- 1000mm focal length
- Pyrex optical parabolic primary mirror further corrects spherical aberration
- Front corrector plate corrects spherical and chromatic aberrations, and comas (off-axis aberration) across the entire field of view
- Secondary mirror attached to corrector plate to eliminate diffraction
- Internal baffling reduces stray or unfocused light for bright and clearer images
- High-quality Schott optical glass elements
- Mounting
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- Requires user-supplied mount and tripod
- Cradle-ring assembly enables adjustment to the OTA orientation relative to mount
- Vixen-style dovetail plate
- Integrated 1/4"-20 piggyback camera mounting screw
- Focuser
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- Dual-speed Crayford-style
- 2" diameter drawtube to accept larger eyepieces
- Coarse-focus knob, 10:1 fine-focus knob
- Crayford focusers use a toothless friction system that allows for super-fine precision focusing without backlash
- Brass compression ring to protect eyepieces and accessories
- Optical Accessories
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- 9x50 right angle erect-image finderscope
- 42mm T-ring adapter to mount user-supplied DSLR camera, requires camera specific adapter
UPC: 050234115506 In the Box Sky-Watcher 7.5" f/5.3 Maksutov-Newtonian Telescope (OTA Only) Cradle Ring Assembly 9x50 Right Angle Finderscope Limited 2-Year Warranty Table of Contents
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Technical parametersSky-Watcher S11550 Specs | Optical Design | Maksutov-Newtonian | | Aperture | 7.5" / 19.0 cm | | Focal Length | 1000 mm | | Focal Ratio | f/5.3 | | Eyepiece Barrel Diameter | 2" | | Diagonal | None | | Finderscope | 9x50 right angle erect-image | | Tripod | None | | Mount Type | Vixen-style dovetail plate | | Power Source | None | | Optical Tube Dimensions | Not specified by manufacturer | | Weight | 29.0 lb / 13.1 kg | | | | Package Weight | 37.2 lb | | Box Dimensions (LxWxH) | 48.0 x 17.0 x 15.0" |
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