Monochromatic refrigerated camera ZWO ASI461MM-P

Monochromatic refrigerated camera ZWO ASI461MM-P

Medium format USB 3.0 cooled monochrome camera with a powerful 44x33 mm sensor for first class astrophotography

♦Powerful Peltier cooling regulated down to 35 °C below ambient temperature

♦ Sony IMX461 medium format sensor (44x33 mm) with 100 megapixels

♦ High resolution with 3.76 µm pixels

♦ Maximum quantum efficiency of 91 %!

♦16-bit ADC: dynamic range like a CCD sensor for more gradations

♦ No more annoying amp glow

♦ Anti-glare heating already installed

♦ Working distance of only 22.5 mm from the internal M68 thread

♦ At only 910 grams, a light weight for its size: hardly overloads the focuser

♦ USB 3.0 for fast data transfer

♦ DDR3 buffer for stable data transfer

The ZWO ASI461MM Pro is a 100 megapixel camera for astrophotographers who expect first-class results. The sensor has a dynamic range similar to that of a CCD sensor, with much higher sensitivity. The camera can be used with all well-corrected telescopes and, at only 910 grams, is really light for its size.

The sensor has a 16-bit ADC with 65536 levels, back-illumination technology and high quantum efficiency, enabling great performance in deep sky imaging, Milky Way imaging and research.

Low read noise, no amplifier brightness and no visible fixed pattern noise further enhance the images.

The 100 megapixel Sony IMX461 sensor already offers medium format with an image size of 44x33 mm (approx. 55 mm diagonal) and a high resolution of 11656x8750 pixels. The 3.76 µm pixels have a full-well capacitance of 50.3 ke. In 2x2 binning mode, you get an even higher full-well capacitance of 198 ke and a larger pixel size of 7.5 µm * 7.5 µm.

Sony's back-illuminated CMOS image sensor enhances sensitivity and noise reduction, key factors in improving image quality, while radically realigning the basic pixel structure from front to rear exposure. The advantages of CMOS image sensors, such as low power consumption and high operating speed, have been retained.

The back exposure improves light capture while increasing the amount of light. This enables significantly shorter exposure times and leads to improved quantum efficiency of up to 91 %, an extreme value for astronomical cameras with CMOS sensors.

Sony has developed a unique photodiode structure and on-chip lens optimized for back-illuminated structures, resulting in higher sensitivity and lower random noise without light by reducing noise, dark current and defective pixels compared to the traditional front-illuminated structure.

Conventional CMOS sensors produce a faint source of infrared light during operation, which can often be seen in the corners of uncalibrated images as a telltale sign of "amp brightness." Because the ASI461MM Pro uses a zero-amplifier brightness circuit, you don't have to worry about amplifier brightness or amplifier brightness even when using high-gain, long-exposure images.

The ASI461MM Pro comes with the polyimide heating element that can avoid any condensation problems.
The anti-dew heater, which fits completely into the protective glass, heats it up a little to avoid condensation problems.
The power of the anti-dew heater is about 5W. It can be switched on and off in the software to save electricity.

Even in uncooled operation, this camera requires 1 ampere, which poses a problem for the USB sockets of computers, as they are only designed for 900 mA, i.e. 0.9 A.
Stable operation of the camera is therefore only possible with an external 12 V power supply.

Especially in our latitudes, nights are often very humid. This humidity condenses on your camera, eyepiece or filter when they enter the warm interior of the apartment. Refrigerated cameras in particular are affected. A photo session is quickly over because the sensor freezes.

Good storage is an important prevention against dew and also prolongs the service life.

Delivered:

♦Camera
♦ Pouch
♦ USB 3.0 cable (2 meters)
♦ 2 USB 2.0 cables (0.5 meters)
♦ ASI quick guide