to increase the angular distances between objects (craters on the moon, double stars, etc.)
to collect as much light from weak light sources (galaxies, nebulae, etc.)
The telescope consists of an optical tube (optical instrument)and the mount (tripod and device for the guidance of the pipe).
The types of telescopes:
Telescopes come in 3 basic optics: refractors (lenses), reflectors (mirror), and mirror-lens.
In the telescope-the refractor as a light-harvesting device is used lens.Refractor telescopes have a closed housing, do not require adjustment, can be used as a large telescope. The diameter of the lens of Amateur refractors 50-150mm
Error of manufacture optics have a negligible impact on image quality
The minimum sensitivity of the optics to adverse factors of operation (shaking, temperature)
The lack of stretch marks and shielding helps to maximize the image contrast.
Chromatic aberration color contrast detail halos, samawa low-contrast details on the planets
For protection against condensation requires a special blend that increases the length of the pipe
High cost per mm of aperture (diameter)
The reflector collects the light of the concave mirror. They require alignment (the alignment of the mirrors relative to each other), open pipe. The observer is located on the side of the tube of the telescope. The diameter of the Amateur reflectors 60-300mm
The maximum ratio the price/aperture
Zero aberrations (distortions) in the center of the visual field enable to observe low contrast detail on planets surface.
Telescope tube is a lens hood preventing the deposition of dew on the optical surfaces
The eyepiece is located at chest level or head, which allows at any position of a telescope to find a comfortable position
Requires alignment (position adjustment of the mirrors relative to each other)
Spherical aberration and coma on the optical axis.
The open tube allows mud to get to the mirror. The clean mirror is quite time-consuming and require greater care
The tube of the telescope is quite bulky, which leads to sensitivity to vibrations, wind, etc.
Mirror-lens "hybrid scheme" between the reflector and refractor. There are many implementations of this scheme. The main advantage of these schemes is a compact tube. If the refractors and reflectors focal length approximately equal to the length of a telescope, the mirror-lens tools focal length 2-3 times more than the length of the pipe. Advantages and disadvantages depend on the particular scheme. (Maksutov-Cassegrain, Schmid-Cassegrain, Klevtsov, Ritchey-Chretien, etc.)
How to choose?
Types and models of telescopes, a great many, and to choose an appropriate model very difficult. In order to determine the choice needs to address the following questions:
what kind of budget you plan to spend on buying a telescope?
what objects to expect to see (the Moon and planets, deep space objects)?
do you plan to do astrophotography?
where you will watch (the balcony in the city, country, in field, etc.)?
how will you deliver the telescope to the place of observation ?
are you ready to spend time learning the sky or just want to admire the treasures of heaven?
For observations in the city from the balcony will be a convenient short-focus refractors or mirror-lens telescopes.
For observations of planets optimal refectory or mirror-lens telescopes.
For observations of deep space objects (nebula, galaxies, clusters of stars etc.) need tools with a sizable aperture (often the reflectors of Newton)
I doubt what telescope to buy? Our managers will help You choose the best model.
In our online shop you will find telescope for yourself or as a gift for a child. We sell Amateur telescopes leading manufacturers Vixen, Sturman, Celestron, TAL. Our managers will tell you what telescope is best to buy based on Your objectives and budget.
Digital camera for telescopeToupCam GCMOS01200KPB for astrophotography and guiding. - Color sensor AR0130 with the size of the matrix 1/3“ (4.8 mm x 3.6 mm) - The pixel size of 3.75 x 3.75 µm - Exposure time of 0.4 MS -15 C - Frame rate – 28 fpc (1280x960) and 30 fpc (640x480) - The ratio signal/noise 44 dB - Support Windows 10 (32 and 64 bit), Mac OS, Linux, ASCOM Is the diameter of the eyepieces is 31.75 mm (1.25") threaded mount C-Mount - Complete cable USB2.0, cable guidance ST4 adapter for filters of 1.25", a CD-ROM with drivers and software
Adapter multiphone rigidly fixes the camera lens of the smartphone in front of the eyepiece of the binoculars, telescope or spotting scope. For photo/video. - The width of the phone — 55-94 mm - Diameter of the eyepiece of the instrument is about 1.25" (31.75 mm +/-5mm).
Adapter Sturman AnyPhone for smartphone to optical observation devices: - Phone width 54 mm (2,12”) - 94 mm (3,7”); - Eyepiece diameter is 26.4 mm (1,04”) – 46,4 mm (1,827”). Not installed at the observation optics with a soft, non-adjustable eyecups.
Universal photoadapter intended for the joint use of optical observation devices (telescope, microscope, monocular, binoculars or telescope) with compact digital cameras. - Maximum permissible length of the lens — 50 mm; - Diameter of the eyepiece is 25 to 45 mm; - Maximum load — 2 kg; - Tripod mounting, outer diameter is 1/4 inch.
T-ring for micro 4/3 OM” is designed for installation of digital cameras Olympus OM or model analog standard Micro Four Thirds optical observation devices. The telescope mount: T-mount (thread diameter 42 mm, pitch 0.75 mm) or T2 - Mount the camera: mount standard Micro 4/3 (m4/3)
T-ring is designed for fixing cameras of the line Sony NEX the telescope, the focuser which has a threaded connection T2 (metric thread with a diameter of 42 mm and pitch 0.75 mm), for shooting in direct focus.
Teleconverter Kenko 2x MILTOL designed toincrease the focal length of the lens with T-mount is installed between the lens and the camera. - 2x magnification, the magnification change of the exposure corresponds to two aperture; - Full multi-layer coating; - Thread mount T-mount.
Adapter Kenko T-mount for Canon EF-M mount for lenses with a threaded T-mount for digital camera mount Canon M and joining of system elements MILTOL (Kenko 2x teleconverter, lens, eyepiece attachment). - Thread diameter — 42 mm, pitch 0.75 mm; - Working distance: 18 mm; - Dimensions — 58х9,5 mm.