Bresser AC 90/1200 - Powerful lens telescope with stable EXOS-2 mount
The Bresser AC 90/1200 is made for those who want to see the Moon, planets and bright deep-sky objects in exquisite detail.
With its long focal length and 90 mm aperture, this refractor delivers sharp, high-contrast images - perfect for beginners who want instant results.

Explore the night sky in detail
Look at the Moon and see craters, valleys and shadows as if you were hanging right above it.
See Saturn's rings or Jupiter's cloud bands with its four largest moons.
Even Mars and Venus show recognizable details, such as polar caps and crescent shapes.
The multiple lens coating keeps the image bright, while the fixed dew cap blocks unwanted light so that contrast is preserved.
Strongly built for stable performance
The EXOS-2 mount is the backbone of this telescope.
It carries the optics effortlessly, remains stable and responds precisely to your adjustments.
Dual ball bearings ensure smooth movements, while the precise RA axis keeps tracking tight.
You can later expand the mount with motors - ideal if you want to carefully explore the world of astrophotography.

User-friendly and expandable
This telescope grows with you.
The aluminum tube is light but sturdy, controls are intuitive and object tracking is smooth thanks to slow-motion cables.
Within minutes you have it set up and ready to use.
What to expect
✓ Moon: sharp edges, deep craters and shadows in detail
✓ Planets: clearly visible cloud bands on Jupiter and the rings of Saturn
✓ Deep-sky: bright nebulae and compact star clusters visible under dark sky
✓ Ease of use: stable, reliable and expandable with motor tracking
✗ Sun: only safe with a sunscreen
✗ Astrophotography: limited use without motors
Specifications
Optics
| Feature | Description |
|---|---|
| Type | Refractor |
| Design | Achromat |
| Aperture (mm) | 90 |
| Focal length (mm) | 1200 |
| Focal Ratio (f/) | 13,3 |
| Resolution | 1,53″ |
| Limit value (mag) | 11,6 |
| Light output | 170× |
| Max. useful magnification | 180× |
| Coating | Multiple |
| Tube material | Aluminum |
| Tube construction | Full tube |
Focuser
| Feature | Description |
|---|---|
| Design | Rack Focuser |
| Ocular connection | 1,25″ |
Mount
| Feature | Description |
|---|---|
| Design | EXOS-2 |
| Type | Equatorial |
| Carrying capacity (kg) | 13 |
| GoTo steering | No |
| Pole finder | Yes |
Tripod
| Feature | Description |
|---|---|
| Type | Steel tripod with accessory pocket |
| Height | 63 - 106 cm |
| Weight | 4.6 kg |
Included accessories
| Section | Description |
|---|---|
| Ocular | 26 mm (1.25″) |
| Seeker | 6×30 |
| Diagonal | 1.25″, 90° star diagonal |
| Solar filter | Includes |
| Dew cap | Yes |
| Slow-motion cables | 2 |
| Dovetail | Vixen-Style |
| Counterweight | 1 |
General
| Feature | Description |
|---|---|
| Series | Messier |
| Total weight (kg) | 14,8 |
| Recommended for | Beginners |
| Observation goals | Moon & Planets, Nebulae & Galaxies, Sun (with filter |





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