كاميرا التصوير الفلكي CMOS الملونة المبردة ASI294MC Pro من ZWO

وصف المنتج

يجب توصيل جميع الكاميرات الاحترافية (المزودة بمبرد) بمصدر طاقة خارجي للصورة بجهد 11-15 فولت.

حتى في حالة عدم استخدام المبرد، يجب استخدام مصدر الطاقة حتى يتم التعرف على الكاميرا.

ASI294MC Pro

تعد ASI294MC Pro أول كاميرا في العالم مزودة بأحدث مستشعر Sony IMX294CJK. هذه واحدة من الكاميرات الأكثر مبيعًا من ZWO. وبالنظر إلى المواصفات ومقارنتها بالسعر المنخفض نسبياً، فمن السهل معرفة السبب. تشمل بعض النقاط البارزة ما يلي:

مستشعر بإضاءة خلفية - يعمل على تحسين الحساسية وتقليل الضوضاء
تنسيق 4/3 بوصة بحجم 4.63 ميكرومتر - مثالي للعديد من أنواع التلسكوبات
ADC 14 بت - مما يوفر نطاقًا ديناميكيًا عاليًا يبلغ 13 توقفًا
سعة بئر كاملة مثيرة للإعجاب 7ke- تساعد على تقليل مشكلة النجوم المشبعة، على سبيل المثال.

علاوة على ذلك، فهو يتمتع أيضًا بقيمة عالية جدًا من التيسير الكمي مع ذروة تزيد عن 75%. إذا كنت تبحث عن كاميرا OSC صغيرة الحجم للتصوير الفلكي، فلا يمكنك أن تخطئ في اختيار ASI294MC Pro.

DDR Memory Buffer

The ASI294MC Pro camera includes a 256MB DDR3 memory buffer to help improve data transfer reliability. Additionally, the use of a memory buffer minimizes amp-glow, which is caused by the slow transfer speeds when the camera is used with a USB 2.0 port.

DDR memory buffer is the main difference between ASI “Cool” and “Pro” cameras.

14bit ADC w/ 13 stops DR

The ASI294MC Pro has a 14bit ADC unit, allowing it to achieve 13 stops of dynamic range. This is an excellent characteristic for deep sky imaging, which inherently needs high dynamic range. At 13 stops, the ASI294MC has even more dynamic range than the ASI1600.

HCG Mode

HCG (high conversion gain) mode, which reduces read noise to even lower levels at higher gain without loss to dynamic range, is automatically enabled when the gain setting is 120 or higher. Read noise will drop under 2e-, while dynamic range will remain at 13 stops.

Full well Capacity

The ASI294MC provides a great full well capacity of 63700e-, which is 3 times higher than the capacity of the highly regarded ASI1600. Even bright stars won’t saturate under long exposures. This also means that this camera can achieve higher SNR (signal to noise ratio) with just one single exposure.

Reliable Mechanics

ASI294MC Pro has the same mechanics as ASI1600 Pro. There are four screws that seal the sensor chamber. Our camera design has been extensively tested and is very stable. Even when used in higher humidity environments, ASI294MC Pro will still work well without dew problems.

High QE

The IMX294 sensor is a BSI (backside illuminated type) sensor, which has very high QE (quantum efficiency, which we estimate is over 75% peak).

Dark Current

The dark current of the ASI294 is a bit lower than the ASI1600 at same temperature, based on our test results. Dark frame sample @ Highest dynamic range settings, 300s, -10°C, bin1. Please check the dark frame to make sure you fully know the performance. ASI294MC Pro Dark Frame

USB 3.0 Port & USB2.0 HUB

USB 3.0 Port: Provide 5Gb bandwidth to make it possible for ASI294 Pro to run at 16 fps (14bit, normal mode) or 19 fps (12bit, high speed mode)  at full resolution(11.7Mega).

USB 2.0 HUB: can connect with various accessories, such as filter wheel, guide camera and electronic focuser, so you can better manage your cables. The ASI294 Pro includes two short 0.5m USB 2.0 cables. The integrated USB 2.0 hub is powered by the external power source if you connect one.

Cooling System

Thanks to the two-stage TEC cooling, ASI294MC Pro can lower the CMOS sensor temperature to 35-40 degrees Celsius below ambient temperature, which can greatly reduce dark current generation and sensor noise even during extended exposure times.

*The Delta T 35-40℃ is tested at 30℃ ambient temperature. It might get down when the cooling system is working for a long time. Also, as the ambient temperature falls, the Delta T would also decrease. 

Please notice that the camera needs to be connected to an external 11-15v power supply to implement the cooling function. We recommend you use 12V@3A DC adapter (5.5*2.1mm, center pole positive) or lithium battery with 11-15V to power the camera. If you don’t have one, please click here to buy a 12V power adapter. There are 4 different standards  for different countries, please make sure you selected the correct adapter when placing the order.

Connecting Diagram

1. M43-T2 adapter (optional)

2. EOS-T2 adapter (optional) 3. 2” Filter (optional) 4. 1.25” T-Mount 5. 1.25” Filter (optional) 6. M42-1.25” adapter 7. T2 extender 11mm

Mechanical Diagram

What is in the box?

ASI294 Pro box includes all necessary cables, adapters, and manuals.

Spacer thickness: 0.1mm *1+0.2mm *2+0.5mm *1

The best solution of 55mm back focus length

Read more: https://astronomy-imaging-camera.com/tutorials/best-back-focus-length-solutions-55mm

Q & A: 

1. I noticed amp glow present on the corners of my dark frames,  how should I remove it?

Please don’t worry about that. The amp glow is pretty normal actually. You may learn “What is Amp glow and how do I manage it?” here: https://astronomy-imaging-camera.com/faq

2.  I’ve heard there might be strange patterns on some ASI294MC Pro stretched images, does this mean the camera is defective?

NO, it is not a defect, and it is just a characteristic of the sensor. The pattern calibrates out of the light image with proper flat frames. A proper flat frame is a capture using an evenly illuminated light source, dimmed down to achieve an average ADU value of 24,000 (this is up to the user and their setup – recommended the histogram peak at 1/3 to 1/2 from the left, as shown in the figure below), a 5-second exposure, captured with the same gain and focus point as the light frames.

Product review:

https://www.cloudynights.com/topic/591441-asi-new-camera-294-pro-beta-testing/page-11#entry8165708

Please notice that the camera needs to be connected to an external DC 12V @3A~5A power supply adapter for use (connector 5.5*2.1mm, center pole positive). If you don’t have one, click here to buy a 12V power adapter. There are 4 different standards for different countries, make sure you selected the correct adapter when placing the order.
Or you can also use lithium battery with 11-15V to power the camera.
Just be aware that power supplies out of this range might cause irreversible damages to your camera.