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 Post Posted: Tue Jan 31, 2017 12:27 am 
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Greetings, would love to know if there is ongoing development into reducing the amp glow in 174MM Cool perhaps with driver mods?

I know glow can be subtracted out, but still nice to have cleaner raws

thanks

-Ian


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 Post Posted: Wed Feb 01, 2017 8:28 pm 
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+1

It would be nice to integrate the possibility of cutting off the amp during the capture ...
My friend with his QHY174 has no amp glow effect (and less banding too) ...

Seb.


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 Post Posted: Tue Feb 07, 2017 1:19 pm 
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the amp-glow is from the sensor itself
that's not possible QHY174 don't have amp-glow

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 Post Posted: Tue Feb 07, 2017 2:01 pm 
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Sam wrote:
the amp-glow is from the sensor itself
that's not possible QHY174 don't have amp-glow


hum... :

Image

More info :

http://qhyccd.com/bbs/index.php?topic=5534.0

anti amp glow work great with IMX174 in this QHY174.


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 Post Posted: Tue Feb 07, 2017 2:04 pm 
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you'd better compare our dark frame and with their's at the same exposure

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 Post Posted: Tue Feb 14, 2017 8:39 am 
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Location: Moscow, Russia
Is it possible that QHY camera has hardware subtraction of amp glow? It was mentioned that they have frame buffer and maybe this is a tool for such procedure. Is this assumption reasonable?

If this is true, the areas of amp glow should have bigger noise, as amp glow is stochastic process and will introduce noise, same as for dark current or any other photon count noise.


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 Post Posted: Wed Feb 15, 2017 6:54 pm 
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dvmak wrote:
Is it possible that QHY camera has hardware subtraction of amp glow? It was mentioned that they have frame buffer and maybe this is a tool for such procedure. Is this assumption reasonable?

If this is true, the areas of amp glow should have bigger noise, as amp glow is stochastic process and will introduce noise, same as for dark current or any other photon count noise.


Hi, ;)

I have tried both ASI and QHY cameras.
Believe me, for short exposure DSO imaging with sensors as IMX 174, IMX 185 and IMX 224, amp glow is a big big big problem !!!! And QHYCCD anti-amp glow is very impressive !
On DSO objects, I don't see any noise problem (I'm more interested in the result on real objects than the theorical point of view). And processing is much much much more easier !

Albéric


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 Post Posted: Thu Feb 16, 2017 10:13 am 
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XS_MAN wrote:
Believe me, for short exposure DSO imaging with sensors as IMX 174, IMX 185 and IMX 224, amp glow is a big big big problem !!!!
Albéric


Do you subtract master dark frame when you stack short exposition DSO images?


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 Post Posted: Fri Feb 17, 2017 10:13 pm 
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Quote:
Do you subtract master dark frame when you stack short exposition DSO images?


Yes, I do use dark frames, even with IMX 290 and IMX 178. For these 2 sensors, it's less usefull. It's possible to by-pass them if you use a large amount of raw images.

For my QHY 174 M, the QHY anti-amp glow system removes a large part of amp glow. But additionnal darks removes little bit more the amp glow that remains plus the hot pixels. So, yes I always use dark frames for this camera.

Albéric


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