Bresser AC 90/500 - Compact powerhouse for wide sky images
The Bresser AC 90/500 is perfect if you want to explore the night sky for the first time. The 90 mm aperture captures enough light to show open star clusters, nebulae and the Milky Way clearly. The short focal length of 500 mm provides a wide field of view - ideal for viewing large areas of the sky at once.

You see results immediately. Aim, focus and watch - without complicated settings. The images are bright, sharp and high-contrast, so you can really appreciate the texture of star fields or the glowing nebula of Orion.
The aluminum tube is light but sturdy enough to remain stable while observing. The EXOS-1 mount is surprisingly solid for its class. It keeps the telescope vibration-free, so you can track objects smoothly. Want to go further later? The mount is expandable with a motor for automatic tracking.

The 26 mm eyepiece and 6×30 viewfinder make setting up easy. Within minutes, you're ready to explore the sky. Whether looking at the moon, Jupiter or the Andromeda Nebula - this compact refractor delivers a clear and stable image every time.
What to expect
✓ Moon: sharp craters, mountains and shadows coming to life.
✓ Planets: cloud bands on Jupiter, rings of Saturn and color contrasts on Mars.
✓ Deep-sky: open star clusters and bright nebulae visible in their full glory.
✓ Ease of use: light, compact and quickly set up - ideal for spontaneous observations.
✗ Astrophotography: limited to short exposures.
✗ Sun: safe to use only with an appropriate sunscreen.
Specifications
Optics
| Feature | Description |
|---|---|
| Design | Achromat (refractor) |
| Type | Refractor |
| Aperture (mm) | 90 |
| Focal length (mm) | 500 |
| Focal Ratio (f/) | 5,5 |
| Resolution (arcsec) | 1,28 |
| Boundary magnitude | 11,6 |
| Light output | 170× relative to the human eye |
| Max. useful magnification | 180× |
| Tube material | Aluminum |
| Tube weight (kg) | 1,9 |
Focuser
| Feature | Description |
|---|---|
| Design | Rack Focuser |
| Ocular connection | 1,25″ |
Mount
| Feature | Description |
|---|---|
| Type | Equatorial |
| Design | EXOS-1 |
| GoTo control | No |
| Carrying capacity | 7 kg |
Tripod
| Feature | Description |
|---|---|
| Type | Tripod with accessory holder |
| Material | Steel |
Included accessories
| Section | Description |
|---|---|
| Ocular | 26 mm Super Plössl (1.25″) |
| Seeker | 6×30 |
| Zenith mirror | 90° star diagonal |
| Dew cap | Yes |
| Slow motion cable | Yes |
| Dovetail | Vixen-style |
General
| Feature | Description |
|---|---|
| Series | Messier |
| Total weight (kg) | 12 |
| Application | Moon & Planets, Nebulae & Galaxies |
| Astrophotography | No |
| Recommended for | Beginners |







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