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QHY410C is coming -- what are the advantages of BSI Large pixel
2020 / 08 / 24


Here comes the QHY410C camera.




Familiar chip

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The QHY410C USES Sony's latest back-mounted full-frame color sensor, the IMX410, the same type used in nikon's Z6 and Sony's A7III, as well as a back-mounted version of the sensor used in the QHY128C.





Back according to the type

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What is backlight?What are the advantages of backlighting?I'll give you three seconds to think about it.That's right, we talked about backlighting in zero-based deep space photography 10: An introduction to the bottom Chip concept (1).In order to improve the QE of the chip, there is a way to reverse the chip during assembly and let the light come from the bottom of the chip, which can effectively reduce the interference of the components themselves to the light.This is where backside illuminated (BSI) comes in, following the usual illuminated (FSI) pattern.In general, backlighting means high QE, and backlighting chips are more popular in astronomical photography.





Big full well

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One of the benefits of backlit CMOS is that it improves the full trap.Full well capacity and dynamic range are significantly improved when backlighting is combined with larger pixels.The single pixel of QHY410C has a super-high full well of 120KE -, which has a great advantage when shooting low-light objects.At the same time, QHY410C has the lowest noise of 1.1E -.Due to low readout noise, the dynamic range remains fairly uniform even at higher gain Settings.Big like yuan

 

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The IMX410 also has a larger 5.94 um pixel.Let's review some of the benefits of the big picture.Zero-based deep space photography 12: Why are more than 20,000 flagship machines only 12 megapixels?Full well, SNR, picture size, pixel number, pixel size Overview (2) Find the answer!Sensors with large pixel Numbers usually have large full well capacity and high sensitivity.With large telescopes, catching low-light objects can work wonders.At the same time, as the total number of pixels is smaller, the reading pressure is reduced, and the frame rate of the camera is increased.At full resolution, QHY410C can reach about 15 frames per second (QHY600, which is also full frame, can only reach 3-4 frames), and 45 frames in limit.Therefore, QHY410C is also the model we recommend for deep space sky broadcast.By the way, a piece of news: QHYCCD just developed a broadcast driver, support QQ and other parts of the software streaming media live, welcome to live interested in astronomy fans to try oh.The sample show



Neowise by Terry Hancock
Camera:
QHY410C Back Illuminated Full Frame Color CMOS
Gain 0, Offset 76
ReadMode: High Gain Mode
Optics: Takahashi E-180 Astrograph




M31 by Terry Hancock
Camera: QHY410C Backlit Full Frame CMOS
Gain 0, Offset 76, Low Gain Mode

Optics: Takahashi E-180 Astrograph

Parametric curve (part)




If you are interested, please contact your local dealer or QHY official FACEBOOK!


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