Discovery Astrophotography with ZWO ASTRO

Review: First Light of ZWO ASI2400MC Pro – Shunsuke Sekine

When I started astrophotography four years ago in high school, I used DSLR 760 D. It was convenient as it can be used daily, but the quality of astronomical photos was not so good. Since using ZWO’s CMOS camera, I’ve been able to take astronomical photos of the quality I wanted to take. When I tested the ASI2400MC Pro, I was very surprised at its ease of shooting and image processing. Backside illuminated sensors and zero amp glows are also found in other ZWO products. And they are just as wonderful as many of ZWOer’s amazing images show. What should be noted this time is a pixel size of 5.94 μm and a saturated charge amount of up to 100ke. At big pixel size, the photosensitive area is very large, and it is suitable for astrophotography where the photosensitive performance is very important. The ASI2400MC Pro, by combining the conventional backside illumination technology and anti-amp glow, achieves high sensitivity with a peak QE of 80% or higher and low noise of 1.1e for minimum read noise. The well depth capacity of ASI2400MC Pro is 100ke, which is 132% of another full frame ASI camera ASI128MC Pro, it is able to take photograph without halation of bright stars and nebulae despite its high sensitivity.

The number of pixels of this sensor is 24 MP, which is considerably smaller than that of ASI6200MM/MC. However, it is considered that the monitor used by an individual is up to 4K (about 8 MP). Therefore, the specifications are probably sufficient unless a person prints in A1 or A2 size. In addition, it is advantageous in image processing such as improvement in processing speed and reduction in necessary specifications of a PC. In fact, I did image processing on my MacBook Pro and it went smoothly.

ASI2400MC Pro sample by Shunsuke Sekine

The North American Nebula and the Pelican Nebula that I took with the f/5.3 refracting telescope this time without guiding were processed from the 57 images*1 minute taken with the live stack image using ASIAIR PRO. I did not feel any lack of exposure at all. Therefore, the processing of the image took less than one hour and was very comfortable. The quality of the as-captured live stack image confirmed at the observation site was as if it had been processed. The dark nebula is clearly visible thanks to the ASI2400MC Pro’s excellent high sensitivity and low noise. As a result of using this camera, I think it will be easy to photograph molecular clouds.

Image Data:

Frame: 57*1min

Imaging Telescope: Takahashi FSQ85ED

Imaging Camera: ZWO ASI2400MC Pro

Filter: ZWO Duo band filter 2”

Mount: iOptron CEM40

Accessories: ZWO ASIAIR PRO, EAF

Date: 2020/05/30

Place: Chiba Prefecture, Japan


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