Player One Artemis-C Pro Color IMX294 Cooled Astrophotography Camera

The IMX294 Sensor: 11.7MP Resolution and 65.8k Full Well

The Artemis-C Pro uses Sony's IMX294 back-illuminated STARVIS sensor, a popular choice for its balance of resolution and sensitivity. The 4/3" format, with a 23.2mm diagonal, provides a generous field of view on refractors and is large enough to capture significant targets like the Andromeda Galaxy (M31) or the Veil Nebula complex without requiring a mosaic.

Its standout feature is the 65.8k e- full well capacity. This allows you to capture longer sub-exposures on bright targets, like the core of the Orion Nebula (M42), without saturating the stars, preserving crucial color and detail in the brightest and faintest regions of your image.

2-Stage TEC Cooling: A 40°C Delta-T for Clean Exposures

To combat thermal noise, the Artemis-C Pro incorporates a 2-stage TEC cooling system capable of reducing the sensor temperature by up to 40°C below ambient. This aggressive cooling dramatically reduces dark current, a critical factor for clean, low-noise images, especially during warm summer nights. The camera also features an integrated, adjustable anti-dew heater for the protective window to prevent condensation during humid conditions.

HCG Mode and a 1.2e Read Noise Floor

The Artemis-C Pro features a High Conversion Gain (HCG) mode that automatically engages at a gain of 120. When activated, the read noise drops to its minimum level of 1.2e while preserving nearly the same dynamic range as at low gain. This allows you to shoot with higher gain settings to capture faint signals without the typical noise penalty, a significant advantage for narrowband imaging or targets in light-polluted skies.

A 512MB DDR3 internal buffer ensures stable data transfer from the camera to your computer, even over slower USB 2.0 connections. This cache prevents dropped frames during high-speed captures and helps to further reduce read noise for smoother final images.

A 90mm Body with 4-Point Tilt and Dual Back Focus

The camera's mechanical design includes features essential for advanced imaging. A 4-point sensor tilt plate, adjusted from the rear of the camera, allows you to precisely square the sensor to your telescope's optical axis, ensuring sharp stars across the entire 23.2mm image circle. This is crucial for achieving flat fields with fast optical systems like RASA or Hyperstar setups.

The Artemis-C Pro provides two native back focus distances. The standard 17.5mm is compatible with most standard filter wheels and off-axis guiders. By removing the sensor tilt plate, you can achieve a shorter 12.5mm back focus, providing extra flexibility for complex imaging trains.

Artemis-C Pro vs. ZWO ASI294MC Pro: A Head-to-Head Comparison

Both cameras use the same excellent Sony IMX294 sensor, but differ in their implementation.

• Cooling: The ZWO ASI294MC Pro's main advantage is its slightly more powerful cooling, achieving a 35°C delta below ambient. The Artemis-C Pro pushes this further, reaching a 40°C delta for superior thermal noise control in warmer climates.
• Buffer: The Artemis-C Pro includes a larger 512MB DDR3 buffer compared to the 256MB buffer in the ASI294MC Pro. This provides greater stability and helps prevent dropped frames, especially during planetary or high-speed lucky imaging.
• Sensor Tilt: Player One implements a 4-point rear-adjustment tilt plate, which many users find more intuitive for dialing in corner-to-corner sharpness than the 3-point front-adjustment plate on the ZWO camera.
• Pixel Mode: The ZWO ASI294MC Pro offers an "unlocked" mode that switches the sensor from its native 4.63µm pixels to a binned 2.3µm pixel mode. The Artemis-C Pro operates exclusively with the native 4.63µm pixels, prioritizing full well depth and simplicity.