كاميرا أحادية اللون ZWO ASI294MM Pro المبردة

وصف المنتج

جميع كاميرات Pro (مع المبرد) تحتاج إلى توصيلها بمصدر طاقة خارجي 11-15 فولت للتصوير.

حتى عند عدم استخدام المبرد، يجب استخدام مزود الطاقة لتتمكن الكاميرا من التعرف عليها.

استجابة للطلب الكبير، نقدم الآن ASI294MM Pro. هذه هي النسخة أحادية اللون من ASI294MC Pro - واحدة من أكثر الكاميرات مبيعًا من ZWO. بعض من أهم ميزاتها تشمل:

• مستشعر مضاء خلفياً: لتحسين الحساسية وتقليل الضوضاء
• تنسيق 4/3 بوصة مع حجم بكسل 4.64 ميكرومتر: مثالي للعديد من أنواع التلسكوبات
• ADC 14 بت: مما يمنح نطاقًا ديناميكيًا عاليًا
• سعة بئر كاملة مثيرة للإعجاب تبلغ 66ke: مما يساعد في تقليل مشكلة التشبع النجومي على سبيل المثال
• دقة عالية 4144 * 2822: مع وضع Bin1 ، يمكن للكاميرا العمل بدقة 8288 * 5644 وحجم بكسل يبلغ 2.3 ميكرومتر.

بالإضافة إلى ذلك، لا تتمتع فقط بقيمة QE عالية جدًا مع ذروة تبلغ حوالي 90٪، ولكنها تتميز أيضًا بضوضاء قراءة منخفضة للغاية تبلغ 1.2e. إذا كنت تبحث عن كاميرا أحادية اللون صغيرة الحجم للتصوير الفلكي، فلا يمكنك الاستغناء عن ASI294MM Pro.

دقة عالية بمحول 14 بت مع نطاق واسع

تتمتع ASI294MM Pro بمعايير مماثلة جدًا لإصدارها الملون. كلاهما يحتوي على ADC 14 بت ونطاق ديناميكي عالي يبلغ 13 توقفًا، وهو أعلى حتى من نطاق كاميرا ASI1600MM Pro المعروفة والمحتفل بها.

Backlit Sensor

Sony’s back-illuminated CMOS image sensor improves the sensitivity and noise reduction – the key factors to enhancing image quality. It does this by radically realigning the fundamental pixel structure from front-illumination to back-illumination, while still retaining the advantages of CMOS image sensors such as low power consumption and high-speed operation.

With a conventional front-illumination structure, the metal wiring and transistors on the surface of the silicon substrate that form the sensor’s light-sensitive area (photo-diode), impede photon-gathering carried out by the on-chip lens. A back-illuminated structure minimizes the degradation of sensitivity to the optical angle response, while also increasing the amount of light that enters each pixel due to the lack of obstacles such as metal wiring and transistors. These components have been moved to the back-side of the silicon substrate.

Camera Performance

Large well depth capacity, low read-out noise and high dynamic range.

The full well capacity of 66387e of ASI294MM Pro is near the top of all ASI DSO cameras. It ensures a very high dynamic range of up to 13 stops that will greatly reduce the issue of overexposed images and also help to collect richer color information.

When the gain value is set to 120, the HCG high gain mode is turned on. We’re not saying it’s magic…but we’d like to think it is pretty close. With the HCG-mode turned on, the readout noise is greatly reduced, and the dynamic range is basically unchanged.

Unlocked Bin1 Mode

Yet another perk of the ASI294MM Pro is that the pixel size is switchable – you can switch between unlocked Bin1 mode and Bin2 mode anytime in your astrophotography software. The unlocked Bin1 mode changes the pixel size into 2.3um and increases resolution to 8288×5644. The ability to unlock bin1-mode was a popular request from our customers. Of course we listened to you and worked quickly to make it possible.

Remember that using Bin1-mode will decrease the full well capacity compared to the standard bin2-mode.

Unlocked Bin1: 12bit ADC, 2.3um pixel size, 47 megapixels, 8288*5644 resolution, 14k full well capacity.
Bin2: 14bit ADC, 4.6um pixel size, 11.7 megapixels, 4144*2822 resolution, 66k full well capacity.

You can learn the more differences between unlocked Bin1 and Bin2 modes by comparing the performance charts.

If the sampling accuracy you get with the 2.3um pixel size falls within a reasonable range, then the unlocked Bin1 mode will help you get more object details. However, you will lose dynamic range and ADC bit depth. Also the image files you get at Bin1 will probably be around 4 times bigger than Bin2.

So in the end the unlocked Bin1 mode is double-edged, you may choose to use it or not depending on the specific circumstances during your imaging sessions.

Reliable Mechanics

There are four screws on the camera that seal the sensor chamber. This kind of design has been extensively tested and is very stable and secure. Even when used in higher humidity environments, ASI294MM Pro will still work fine without dew problems.

QE Value

As ZWO’s latest BSI (backside illuminated type) monochrome camera, ASI294MM Pro has a very high QE performance, not only higher than its color version, but even than that of ASI1600MM Pro. It is estimated that the QE peak value is about 90%.

ASI294MM Pro vs ASI1600MM Pro

Two-Stage TEC Cooling: Ultra-Low Dark Current

Thanks to the two stage TEC cooling, ASI294MM Pro can lower the CMOS sensor temperature to more than 35 degrees Celsius below ambient temperature, which can greatly reduce dark current generation and sensor noise even during extended exposure times.

*The Delta T 35℃ 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. 

The unique dark current suppression technology can further reduce dark current noise. When it’s cooled to -20℃, the current noise can be as low as 0.0022e/s/pix, which is completely negligible!

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 this link 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.

https://astronomy-imaging-camera.com/product/acdc-adapter-12v-5a-for-cooled-cameras

USB3.0 & 256M DDR3 Memory

The ASI294MM Pro is equipped with a USB 3.0 transmission interface and a built-in 256MB (2Gb) DDR3 cache to ensure stable and secure data transmission. Under long exposure, it effectively avoids frame dropping and greatly reduces the glow effect caused by slow reading speed.

Notice: To learn how to tackle possible amp-glow that shows in your images, please refer to this tutorial: “What is Amp-glow and how do I manage it? “

https://astronomy-imaging-camera.com/faq

Mechanical Diagram

Our website is always updated with the most recent camera drivers as well as software for DSO and planetary imaging. Please make sure the most recent driver and software has been installed before you start shooting:

It is also recommended to read the Manuals first before shooting.

The best solution of 55mm back focus length

We know that connecting new equipment can be daunting at first, so to help you out we have made tutorial on detailed connection methods of ASI294MM Pro. Just click the link below:

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

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.

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.

What’s in the box?