Bresser Telescope AC 90/500 Messier EXOS-2 GoTo (54671)

The Messier series by Bresser offers telescopes that provide excellent performance at an affordable price, making them ideal for ambitious beginners. These telescopes are designed to be expandable and retrofittable, ensuring they remain useful as users progress in their astronomy journey.

AC 90/500 Optics: A Compact and Versatile Telescope for Widefield Observations
The achromatic refractor AC 90/500 features a 90mm aperture, delivering excellent light-gathering performance. Its 500mm focal length ensures a wide field of view, making it perfect for observing open star clusters and the Milky Way. These features make the telescope appealing to both beginners and experienced observers.

For those primarily interested in observing the Moon and planets, a telescope with a longer focal length, such as the AC 90/900, would be more suitable.

The included accessories allow you to start sky observation immediately after unpacking. For terrestrial observation, an Amici prism is recommended as an additional accessory.

Bresser EXOS-2 Mount with GoTo System
The EXOS-2 is a robust equatorial mount designed for both visual observations and astrophotography. It has a high load capacity of up to 13 kg for visual use and 10 kg for photographic use. The mount ensures precise tracking, supported by double radial ball bearings for smooth operation, while the optimized RA-axis minimizes play.

This mount is compatible with the Bresser GoTo system, which simplifies locating celestial objects. The GoTo system allows even beginners to observe planets, nebulae, or galaxies within minutes by automatically slewing to the selected object and tracking it. The database contains over 100,000 objects, enabling effortless observation or photography of faint celestial bodies that would otherwise be difficult to locate using traditional methods.

Included with the Mount:

• Sturdy equatorial mount

• Counterweight included

• Robust steel tripod with three legs

Specifications

Optics:

• Type: Refractor

• Type of build: Achromat

• Aperture: 90 mm

• Focal length: 500 mm

• Aperture ratio (f/): 5.5

• Resolving capacity: 1.28 arcseconds

• Limit magnitude: 11.6

• Light gathering capacity: 170x (compared to the naked eye)

• Maximum useful magnification: 180x

• Tube material: Aluminium

• Tube weight: 1.9 kg

• Tube construction: Full tube

Focuser:

• Type of build: Gear rack focuser

• Connection to eyepiece: 1.25"

• Gear reduction: None

Mount:

• Mounting type: Equatorial (EXOS-2 mount)

• Load capacity: Up to 13 kg

• GoTo control: Yes (database with over 100,000 objects)

• GPS: No

• Interfaces: Autoguider ST-4 compatible

Tripod:

• Material: Steel tripod with accessory plate included

• Type: Tripod

• Weight: 4.9 kg

• Maximum tripod height: 108 cm

Included Accessories:

• Eyepiece (1.25"): SPL 26 mm included

• Finder scope: 6x30 finder scope included

• Deviating optics: 1.25", 90° star diagonal included

• Dew shield included

• Prism rail: Vixen-style prism rail included

Miscellaneous:
Polar finder scope included; finder base compatible with Meade/Explore Scientific T-profile

General Information:

• Series: Messier series by Bresser

• Total weight (including mount and tripod): Approximately 14 kg

Area of Application:

• Moon & Planets Observation: Yes

• Nebulae & Galaxies Observation: Yes

• Astrophotography: No

• Nature Observation: No

• Sun Observation: No (only with an appropriate solar filter)

Recommended For:

• Beginners: Yes

• Advanced users: No

• Observatories: No