Sky-Watcher Telescope BK MAK 102 OTA optical tube

Telescope with Maksutov type optics, characterized by excellent image sharpness and lack of chromatic aberration. It consists of a meniscus corrector made of crown glass, a primary mirror, and a secondary mirror placed inside the meniscus. This model is also suitable for terrestrial observations, making it appropriate for both beginners and more experienced users.

The telescope is based on the Maksutov-Cassegrain optical system, which includes a meniscus correcting plate, a primary mirror, and a secondary mirror located on the inner side of the meniscus. This type of design is valued for its excellent sharpness and high contrast of the image, as well as for reducing optical defects such as coma or chromatic aberration.

The tube diameter is 120 mm, focal length is 1300 mm, and the eyepiece holder diameter is 1.25 inches. The maximum magnification reaches 153 x. The use of a long focal length allows for detailed observations of the Moon's surface, Saturn's rings, Jupiter's cloud bands, and other bright celestial bodies. The optical elements are coated with multi-layer coatings that increase light transmission and enhance contrast. This solution allows for clearer details during planetary and lunar observations and improves observation comfort at high magnifications.

The model can be mounted on a photographic tripod thanks to a suitable connector on the tube. Due to the telescope's long focal length, the manufacturer recommends using at least AZ4 (azimuthal) or EQ3-2 (parallactic) class astronomical mounts. The tube measures about 280 mm and weighs just under 2 kg, enabling easy transport in a small backpack or carrying bag.

• diagonal (mirror): 1.25" 90 deg.
• eyepieces: 1.25 inches - Super 25, Super 10
• case
• finder: Star Pointer

• compact telescope in the Maksutov-Cassegrain system
• high sharpness and image contrast
• minimized chromatic aberration and coma
• lens speed f/12.7 designed for planetary observations
• lightweight and mobile design with a length of about 280 mm
• possibility of mounting on a photographic or astronomical mount
• multi-layer optical coatings improving light transmission
• ability to conduct astronomical and terrestrial observations

Optical system of the telescope: Maksutov-Cassegrain
Type of mount: No mount
Aperture: 102 mm
Focal length: 1300 mm
Lens speed: 12.7
Stellar magnitude: 13.5 magnitude
Light-gathering power (compared to the naked eye): 212 x
Maximum useful magnification: 153 x
Tube weight: 1.9 kg
Tube length: 280 mm
Tube diameter: 120 mm
Focal length of eyepieces / magnification: 25 mm/52x, 10 mm/130 x
Type of eyepiece holder: SCT/MAK
Diameter of the eyepiece holder: 1.25 inches
Diagonal: 90 deg. mirror
Finder: StarPointer
Central obstruction: 32.5 mm
Maximum resolution capability: 1.37 inches
Manufacturer: Sky-Watcher, Taiwan