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Summary of Contents for NPZ TAL-75R
- Page 1 REFRACTOR TELESCOPE TAL-75R INSTRUCTION MANUAL...
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Page 2: Table Of Contents
Contents Page General instructions ....... 3 Specifications ........4 ... -
Page 3: General Instructions
To avoid eyes injury, do not look at the Sun without black light filter on the telescope! Children can look through the telescope under the adult’s control only. Telescope TAL-75R (hereafter referred to as the telescope) is designed for visual observation and photographing of celestial objects. -
Page 4: Specifications
Specifications Name Value Objective lens diameter, mm Focal length, mm Magnification, x: with eyepiece (f’=.5 mm) with eyepiece and Barlow lens with eyepiece, Barlow lens and bushing Field of view: with eyepiece (f’=.5 mm) ° with eyepiece and Barlow lens 0 °30 ' with eyepiece, Barlow lens and bushing 0 °0 '... -
Page 5: Delivery Set
Delivery set Name Quantity Telescope Finder Counterweight Eyepiece (f = 12.5 mm) Barlow Lens 2 х Bushing Yellow light filter List of enclosure Instruction manual Supplementary accessories Pillar C57 – Prism for direct observations PP-45° (.5”) – Eyepieces (.5”): f’ = 6.3 мм –... -
Page 6: Design Of Telescope
Design of telescope The telescope consists of three main parts: optical tube assembly (OTA) (), parallactic mount(), and a tripod(3). The optical tube is a basic component of the telescope. It includes all main optical units such as an objective lens and an eyepiece unit. - Page 7 The OTA supplied with a finder, that makes easier the searching for celestial objects. All lenses surfaces are covered with multilayer antireflection coating. The eyepiece unit includes a focusing device with an eyepiece tube. Focusing device of friction- ...
- Page 8 The parallactic mount is intended for pointing the telescope at the celestial objects and tracking their diurnal motion. Mount consists of inclination axis () with counterweights and polar axis (). Rough pointing of the telescope tube by both axes fulfills by tube rotation when the handles (3) are loosen.
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Page 9: Preparation For Observations
Preparation for observations Remove the telescope from its Assembling packaging. Release the clamp screw (), shift the telescope tube of telescope to the middle position and secure it with the screw. Loosen the handle on the latitude mount (), turn the tripod in operation position and secure it. -
Page 10: Polar Axis Balance
Mount the bracket with finder (1) on the telescope tube. Fasten the bracket with two screws (). To provide a smooth motion of parallactic mount axes drives and Polar axis balance comfort of observation, the balancing of the telescopes is required. Set the polar axis in the horizontal ... -
Page 11: Adjustment Of Optical Axes
Telescope has large magnifications and consequently – small fields of view. Adjustment It complicates the search of objects in the sky that is why the telescope is of optical axes provided with optical finder with large field of view. With the help of the finder you can easily find necessary object in the sky and then observe it in the field of view of the telescope. -
Page 12: Telescope Alignment At The Celestial Pole
Due to the Earth’s rotation, celestial sphere performs a full circle in twenty- Telescope four hours. As a result, the celestial alignment at the object in the field of view of the telescope will constantly move and go celestial pole out of the field of view and the higher telescope magnification –... -
Page 13: Visual Observations
Observations At high magnifications, along with increase of visual sizes of the object there is a growth of noises of atmosphere, which appears as roughness and blurring of images of distant objects, blink and blurring of stellar images. Observations in the cold weather are possible when all parts of the telescope reached thermal equilibrium with the ambient air. - Page 14 Insert the eyepiece () into the eyepiece tube (). With the help of handwheels (3) of focusing device, achieve the best sharpness of the image. Using eyepiece (), Barlow lens () and bushing (3), you can get different magnifications (see “Specifications”, p.
- Page 15 To eliminate chromatism during the bright objects observing use a yellow light filter (1), installed into the eyepiece (). For sun observations, use solar light filter (1), mounted on the objective blend (). Warning! To avoid eyes injury, it is expressly forbidden to look through the telescope at the Sun without solar (black) light filter on it!
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Page 16: Photographic Observations
Use a miniature reflex camera with an objective’s thread M4x0.75 to take Photographic pictures of celestial objects. observations To operate with other photo cameras, use adjusting rings, selling in the specialty stores. To mount a camera on the telescope, take off deflecting mirror (1), screw () and bushing (3). -
Page 17: Maintenance
Maintenance In order to keep the telescope in good operating condition it is necessary to check it’s technical state and fulfil maintenance. Keep the telescope clean and protect it against physical damage to provide no-failure operation of the telescope. Periodically wipe off the dust from the metal surfaces with clean ... -
Page 18: Telescope Alignment
Telescope alignment Resort to disassembling and alignment of the optics follows in cases of emergency and ONLY after the warranty period. T h e n e c e s s i t y i n a d d i t i o n a l alignment of the telescope can appear after optics cleaning or accidental misalignment. -
Page 19: Storage
Storage It is necessary to store the telescope in a dry heated place with a temperature range of +5° to +40°C and relative humidity up to 80%. Avoid impacts and sharp shocks of telescope. It is prohibited to store acids, alkalis or any chemical materials, ... -
Page 20: Acceptance Certificate
Acceptance certificate Telescope TAL-75R, serial No. ____________________, parallactic mount, serial No. ___________ , are fit for operation. Date of issue ______________ 20 г. Signatures __________________ Free retail price. Manufacturer: FSUE PA “Novosibirsk Instrument-Making Plant” Dusi Kovalchuk, 79/, Novosibirsk, 630049, Russia...
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