ZWO ASI533MM Pro
ZWO
ZWO ASI533MM Pro is a 1-inch square monochrome astronomy camera for LRGB and narrowband deep-sky imaging.
Best Current Offer
Specifications
Sensor
- Sensor model
- Sony IMX533CLK-D CMOS
- Color / mono
- Monochrome
- Sensor size
- 1-inch square (11.31 × 11.31 mm, 16 mm diagonal)
- Megapixels
- 9 MP
- Resolution
- 3008 × 3008 (9 MP)
- Sensor diagonal
- 16 mm
- Sensor area
- 127.9 mm²
- Pixel size
- 3.76 μm
- Shutter
- Rolling shutter
- ADC
- 14-bit
- Read noise
- 1.0-3.8 e-
- Full well
- 50 ke-
- Peak QE
- 91% (mono)
Cooling
- Cooling
- Two-stage TEC, ΔT 30-35 °C below ambient
- Sensor window
- AR-coated D32-2 protective window with anti-dew heater
Mechanical
- Back focus
- 6.5 mm / 17.5 mm
- Interface
- USB 3.0 + USB 2.0 hub, 256MB DDR3 buffer
- Weight
- 410 g
Sensor / electronics
- Pixel size
- 3.76 um
- Full well
- 50000 e-
- Read noise
- 3.8 e-
- ADC
- 14-bit
- Back focus
- 6.5 mm
Astrophotography Fit
A cooled monochrome camera best used where its sensor size and workflow match the telescope and calibration plan.
ZWO ASI533MM Pro is a premium monochrome camera aimed at LRGB and narrowband deep-sky imaging. Sensor format: 1-inch square (11.31 × 11.31 mm, 16 mm diagonal). Pixel size: 3.76 μm.
As a mono camera, it becomes a system only after you add a filter wheel, LRGB filters, and narrowband filters. The payoff is stronger control over signal, star color, and emission-line contrast, but the setup asks for calibration discipline.
Match the camera to the telescope before buying: sensor size controls framing, pixel size controls sampling, and cooling only pays off when you also shoot darks and flats. If the scope cannot illuminate the sensor cleanly, a smaller camera can produce better data than a bigger one.
Best paired with
- Electronic filter wheel sized for the sensor and back-focus budget
- LRGB plus Ha, OIII, and SII filters matched to the sky conditions
- Guided refractors or corrected astrographs with a clean calibration-frame library
Not recommended for
- First-time imagers who want a simple one-shot color workflow
- Rigs without budget or back focus for a filter wheel and filters
- Casual sessions where darks, flats, and repeatable gain settings are unlikely
Retailer Rating
Ratings aggregated from public retailer data.
Retailer breakdown
| Retailer | Rating | Reviews | Source |
|---|---|---|---|
| Agena AstroProducts | 5.0 | 19 | Product page |
| High Point Scientific | 4.8 | 11 | Product page |
Where To Buy
Some links on this page are affiliate links. Prices and availability are pulled automatically from each retailer and updated daily.
| Retailer | Price | Availability | View Offer |
|---|---|---|---|
| Agena AstroProducts Agena AstroProducts | $899.00 | In stock Updated 11/4/2026 | View Offer - $899.00 |
| Astronomics Astronomics | $999.00 | In stock Updated 11/4/2026 | View Offer - $999.00 |
| Cloud Break Optics Cloud Break Optics | $999.00 | In stock Updated 11/3/2026 | View Offer - $999.00 |
| High Point Scientific High Point Scientific | $999.00 | In stock Updated 11/4/2026 | View Offer - $999.00 |
| Mile High Astronomy Mile High Astronomy | $999.00 | In stock Updated 11/4/2026 | View Offer - $999.00 |
| Starizona Starizona | $999.00 | In stock Updated 11/4/2026 | View Offer - $999.00 |
| Telescopes.net Telescopes.net | $999.00 | In stock Updated 11/4/2026 | View Offer - $999.00 |
| ZWO USA ZWO USA | $999.00 | In stock Updated 11/4/2026 | View Offer - $999.00 |
Price History
Chronological retailer pricing with out-of-stock points shown at reduced opacity.