QHY9 teething problems

[samir_ansari]

Hi everyone, I just bought a QHY9 and am having a slight issue. When I take a quick 300ms exposure with the cap on I get this:

(dark.jpg)

Which is kind of what I would expect However taking the cap off and pointing it at anything in my living room I end up with this clipped looking black and white image:

(artifact.jpg)

I'm using EZCAP and have tried playing around with the gain and offset but still no use. I know this camera is sensitive but surely 300ms is low enough for me not to get a clipped image from dim living room lighting?

Has anyone come across this before?

Thanks,

Samir

[r3i]

Hi Samir,

CCD imagers are very sensitive and it's possible that a 0.3s exposure may be overloading the sensor.

Try lower exposure times e.g. 0.1s, 0.05s, 0.01s.

Also try taping a piece of cardboard to the end of the scope with just a small hole in the centre - this will further reduce the light getting to the sensor.

[samir_ansari]

Thanks for that r3i - I'll give that a whirl tonight and see what happens.

[samir_ansari]

Yep you were right - It was just because the chip is too sensitive. Pointing it at the ground and doing a 1ms exposure worked fine

[Catanonia]

I concur and did the same test as you when I got my QHY9. It is VERY sensitive and you are indeed flooding the chip.