BRESSER - Astrophotography-optimized Newtonian telescope with a parabolic primary mirror and fast optics

An optimal set for ambitious astrophotographers: the BRESSER Messier NT203s/800 Telescope with EXOS-2 PMC-Eight GoTo Mount. With its short f/3.9 focal ratio, this 203-mm telescope with a parabolic primary mirror allows deep sky imaging with short exposure times. The large 85 mm secondary mirror ensures optimal field illumination, while the high-quality 2.5" Hexafoc focuser enables vignetting-free photography. The modern mount impresses with its precise GoTo control and easy operation via the ExploreStars app, ensuring accurate tracking and intuitive sky navigation.

The Telescope

The BRESSER Messier Newton Telescopes have established themselves as reliable workhorses for astrophotography in recent years. With the Messier NT203s/800 with Hexafoc, we present the latest generation of these devices. The photo-Newton with a parabolic primary mirror and a fast focal ratio of 203 mm (8") f/3.9 enables deeper exposures in the same amount of time. The large 85 mm secondary mirror guarantees optimal field illumination, and the high-quality 2.5" Hexafoc focuser ensures vignetting-free photography. The tube rings with a 44-mm universal dovetail bar and handle with camera mounting option, along with an excellent bright crosshair finder, round out this high-quality device.
The focuser can also be upgraded with a 10:1 reduction gear (Art. No.: 0625720). For pinpoint star imaging, the optional HR Coma Corrector (Art. No. 0510330) can be used. This is designed for both visual and photographic use, significantly improving image quality, especially in the outer areas of the field.

The Mount

The EXPLORE SCIENTIFIC EXOS-2 PMC-Eight GoTo Mount is equipped with a modern and highly precise GoTo control system. It consists of a robust Wi-Fi controller unit that provides all necessary interfaces. The NEMA-11 stepper motors are directly connected to this unit via cable, and a ST-4 compatible autoguider port is also available. The control system also supports micro-step operation to ensure precise tracking.

Intuitive operation via app and graphical star map
The ExploreStars app, specifically developed for the PMC-Eight system, impresses with its well-designed, intuitive graphical interface. The current alignment stars for control initialization, as well as all celestial objects in the database, are displayed as a star map with additional text information. All these objects can be conveniently viewed and selected.

Powerful controller unit with Open GoTo for customization
At the heart of the controller unit is a fully autonomous 2-channel multi-processor with 8 CPUs and a Wi-Fi Ethernet 10/100 adapter with IP functionality. This allows remote operation via browser, ASCOM, app, or serial connection. With Open GoTo, custom firmware can also be written and loaded into the controller unit, allowing customization of device functions and the creation of custom object lists, etc.

Polar finder included
The included and pre-installed polar finder scope enables quick and precise polar alignment for long exposure times without unwanted star trails. The integrated LED lighting unit further enhances the user experience of the polar finder.


FEATURES TELESCOPE

• Type: Reflector telescope
• Mirror diameter: 203 mm / Focal length: 800 mm / F/3.9
• Maximum useful magnification: 406x
• Telescope for night and solar observation
• High-quality Hexafoc focuser with a 2.5" free inner diameter
• Diffraction-limited optics with parabolic primary mirror
• 8x50 finder with crosshair eyepiece
• Optimized finder bracket for comfortable viewing
• Handle for easy transport with integrated camera holder (tripod thread)
• Smartphone adapter for sky navigation included
• Dovetail bar with stainless steel clamping surface
• Connection option for SLR cameras (optional T2 ring required)
• 50.8 mm to 31.7 mm adapter with integrated T2 adapter (optional T2 ring required); with brass compression ring
• Focus point approx. 100 mm above the fully retracted focuser
• Large 85 mm secondary mirror
• Large knurled screws for adjusting primary and secondary mirrors
• Telescope tube weight without accessories: 8.7 kg; with accessories: 11.5 kg

FEATURES MOUNT

• Powerful PMC-8 Open GoTo system
• User-friendly and graphically appealing ExploreStars OpenGoto app
• Wi-Fi control via tablet, laptop, or desktop PC with a minimum 7" display and Wi-Fi functionality (not included)
• Compatible operating systems: WIN8.1, WIN10/11, iOS, or Android 4.4 and higher
• Classic control via direction keys or joystick for guiding, centering, correcting, and moving via touchscreen
• Intuitive 2-star and 3-star alignment for GoTo system initialization
• Multiprocessor microcontroller with 8 CPUs
• Micro-stepper motors NEMA-11
• Highly precise and quiet belt drive
• ST-4 compatible autoguider port
• ASCOM drivers available, also supports pulse-guiding
• Ability to create your own firmware and object lists and load them into the PMC-8
• GPS compatible / Settings depend on the computer or tablet used
• Powered by 12-volt DC, with a maximum power consumption of 1.6 amps at full load

SCOPE OF DELIVERY

• Optical tube
• 26 mm Super Plössl eyepiece (31.7 mm / 1.25")
• Integrated 31.7 mm and T2 adapter
• Dovetail bar with stainless steel clamping surface
• Adapter for 50.8 mm (2") eyepieces
• Rotating star map
• Solar filter
• Telescope rings with handle and camera holder
• 8x50 finder scope
• Smartphone adapter for navigation
• Astronomy PC software Stellarium (via download)
• EXOS2-GT mount with Open GoTo PMC-8
• Stainless steel tripod with built-in bubble level
• Counterweights 2 x 4.5 kg
• Polar finder with lighting unit
• 12-volt / 2-amp power supply
• ExploreStars app (via software download)
• User manual