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Messier MC-152/1900 is a mobile telescope (optical tube) with a large focal length that allows for obtaining strongly magnified, excellent quality images. It is a great choice for astronomy enthusiasts whose interests focus not only on observing the moon and planets. 152 mm diameter and universal design using the advantages of both reflectors and refractors ensure that it is also an instrument for observing distant objects of low brightness and for astrophotography.
This telescope will reveal the Crab Nebula, created after a gigantic stellar explosion in 1054 in the constellation of Taurus. You will also see the great nebula in Orion, the magnificent Whirlpool Galaxy near the handle of the Big Dipper, and the Dumbbell Nebula in the constellation of Vulpes. Telescopes equipped with this optical system are also successfully used for ground observations and as photographic lenses. The best catadioptric design of the Maksutov-Cassegrain optical system provides sharp, clear, high-contrast images with a wide field of view. The optical system of the telescope is composed of a spherical mirror with a meniscus lens, a secondary mirror placed on the inner part of the meniscus directing the image to the eyepiece. The telescope is characterized by reduced coma and only residual chromatic aberration.
The closed tube design reduces the occurrence of air currents that reduce sharpness and protects the mirrors from dust.
The telescope is ideally suited for use on various types of mounts, both equatorial and azimuth, with a load-bearing capacity adjusted to the telescope's weight.
The telescope is equipped with a Hexfoc eyepiece focuser. The geometric design of the focuser is based on a hexagonal profile with a diameter of 2.5". Thanks to this solution, the effect of unwanted shifting of the focuser sleeve has been eliminated, especially when installing heavy accessories. Additionally, the focuser construction uses adjustment modules that correct any shifting of the inner sleeve and allow for unambiguous determination of its position. These solutions have allowed for exceptionally smooth guidance and a high level of stiffness unheard of in focusers in this price range. Even relatively heavy cameras and accessories can be operated without tilting and slipping. The large 2.5" diameter significantly reduces vignetting.
The extension tube can be expanded with a precise focusing module with a ratio of 1:8.
A dedicated lens solar filter and frame are included. Optical tube
• Lens diameter: 152 mm
• focal length: 1900 mm
• aperture: f/12.5
• maximum usable magnification: 304 times
• minimum usable magnification: 25 times
• resolution: 0.92"
• optical system: Maksutov-Cassegrain
• Extractor: Hexafoc 2.5" with output for 2" and 1.25"
• finder: 6x30 optical
• angle included: 90° 1.25" mirror
• color: white
Glasses
• 26 mm SP (1.25") giving 73x magnification
Dimensions
• tube length: 490 mm
• total length without angle connector: 50.5 cm
• total length with angle connector: 55.5 cm
• weight: 6.5 kg 10 years (manufacturer's warranty)
Introductory note: we prepared this study in connection with a specific customer inquiry in December 2020. A day is 86400 seconds, but second by second and before you know it - 10 years have passed. Please look at the calendar, so that it is not clear by what right we have outdated data in 2031. Historical data should always be taken cum grano salis Bresser Messier MC-152/1900 OTA
• focal length similar to the entire Maksutov series
• very solid 2" hexagonal CNC extension with 1.25" reduction, no mirror movement - this eliminates the so-called mirror wobble, which is especially common in several-year-old models
• reduction of the extension from 2" to 1.25" directly with the T-2 thread
• carrying handle with 1/4 inch screw for attaching accessories
• dovetail with sheet metal at the screw clamp - eliminates paint stripping from the rail
• finder, angle and eyepiece included
• 6x30 finder rather small, 1.25" angle (neither bad nor good)
• a focuser with extensions, which should be used depending on whether we are taking pictures or observing - it is a bit more troublesome than moving the main mirror (but - see the first point for this tube, no nodding - something for something)
• narrow finder's foot - Bresser's own standard, not the classic Vixen small dovetail - difficult to replace the finder with something more distinguished, e.g. 8x50 angled
Orion MAK 150 mm 150/1800 (#09967)
• focal length similar to the entire Maksutov series
• focusing in a huge range (practically unlimited backfocus) by moving the main mirror
• the largest internal diameter of the opening leading to the extractor, equal to 31.1 mm
• the most appreciated optics
• after unscrewing the visual back tube has an SCT outlet, so it allows for mounting accessories with an SCT thread
• finder foot in the standard of a small Vixen
• no eyepiece, finder, angle - "bare" tube
• possible mirror nod, rarely reported and completely acceptable below 1 mm
Sky-Watcher MAK 150 OTAW
• focal length similar to the entire Maksutov series
• focusing in a huge range (practically unlimited backfocus) by moving the main mirror
• rich set - 2" mirror angle with 1.25" reduction, 2" eyepiece, 9x50 straight finder
• finder foot in the standard of a small Vixen
• smaller passage than in the Orion tube (26.3 mm vs. 31.1 mm) - possible vignetting with long-focus eyepieces, especially 2-inch ones
• possible mirror nodding, but we do not know the estimates of its magnitude and frequency
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