Recent Posts

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CCD Camera / Re: Gradients with my QHY10
« Last post by olivdeso on Today at 08:40:34 PM »
Nothing to do with the QHY10. This is just common gradients on the sky. (quite the same at my side using a DSLR)

Should be improved using flats and offsets. A good flat is really the key of a successfull processing, it is very important to do it well at the same time as the light frames. Offets and darks frames can be done afterward at home.

However, gradients are often difficult to remove on such pictures. You may see that the gradient is not always the same on all the light frames. It has probably changed along the sequence.
Pixinsight has some advanced feature to do it on light frames, more efficient than doing it on the final picture.
2
CCD Camera / Re: QHY11 critical problem: usb device not recognized
« Last post by olivdeso on Today at 08:21:46 PM »
Hi Michelle

This may not be so critical in fact : it sounds like a power up sequence issue. Hopefully it should be solved by following this power sequence: (which I always used with several QHY CCDs since years including the QHY11)

- first of all ensure that the power cable between the camera and the power supply DC201 is well connected at both ends

- then power the 12V at the DC201

- then connect the USB cable

If the USB cable is connected first, without any power supply at the DC201, this kind of error can occur, depending on how much power the USB of the PC can output. So it is quite common.

If everything is already connected, just disconnect and re-connect the USB.

The most important : never disconnect the power cable between the DC201 and the camera until all other cables are disconeced. So always plug this cable first at the begining and disconnect last at the end.

Olivier
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CCD Camera / Re: QHY11 critical problem: usb device not recognized
« Last post by olivdeso on Today at 08:16:10 PM »
Hi Michelle

This may not be so critical in fact : it sounds like a power up sequence issue. Hopefully it should be solved by following this power sequence: (which I always used with several QHY CCDs since years including the QHY11)

- first of all ensure that the power cable between the camera and the power supply DC201 is well connected at both ends

- then power the 12V at the DC201

- then connect the USB cable

If the USB cable is connected first, without any power supply, this kind of error can occurs, depending on how much power the USB of the PC can output.

If everything is already connected, just disconnect and re-connect the USB.

The most important : never disconnect the power cable between the DC201 and the camera until all other cables are disconeced. So always plug this cable first at the begining and disconnect last at the end.

Olivier
4
CCD Camera / Re: QHY9 and QHYCFW2 7-Position ASCOM Problem
« Last post by luotong on Today at 07:20:03 PM »
Hi all,

Thank AMG for his cooperation, we have fixed this issue now. The lastest version of CFW ASCOM driver (V1.7)had been published, it had fixed this issue.

And the reason of the issue is that some softwares(eg. Sequence Generator, TheSkyX) does not record the last runtime settings of the CFW position. That means every time you open the software, the cfw position displayed in the software is 'pos1' by default.
Then if we set the filter position to 'pos 1', it checked and found it was same with current position. Then it will not called the method 'Position' (this is a external interface that provided by ASCOM to used to control the filter wheel). So the CFW will not move.
Some softwares (eg. MaxIm DL) can record the position. so they do not have the issue.
To solve this issue, we find a way to avoid it in CFW ASCOM driver. That is every time you connected the filter wheel, we will reset the filter position to 'pos1'.

best regards.
5
CCD Camera / Re: QHY11 critical problem: usb device not recognized
« Last post by luotong on Today at 06:10:54 PM »
Hello,

you need to submit a ticket in Contact page of QHYCCD website.  Then the maintenance personnel of after-sale will help you.

best regards.
6
CCD Camera / QHY11 critical problem: usb device not recognized
« Last post by Michele Guzzini on Today at 10:54:33 AM »
Hello, the 4000 QHY11 that we own at the observatory suddenly stopped working  :(
When I connect the usb cable I get a "USB device not recognized", tried with Windows XP and Windows 7.
In the device manager I have a "Unknown device" with VID and PID both set to 0000.
Please tell me what can I do.
Thank you.
7
CCD Camera / Re: Gradients with my QHY10
« Last post by einari on Today at 01:33:33 AM »
Looks like normal vignetting to me.
Flats should take care of that.
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CCD Camera / Gradients with my QHY10
« Last post by Max13 on Today at 12:57:28 AM »
Hello,
Recently I bought a QHY10, but I noticed that the photos show obvious gradients in the sides.
Please examine the photo in attachment, there is green on the right and red on the left and on the top.
I taken this photo at -20 and not calibrated, but I think isn't normal.
Do you have some information about it.
Thanks in advance.
Massimo
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That's why they call it a Guider, and not a Web camera.
We all start to learn slowly, but get there in the end.

Hope you get the most from it.

Theo.
10
CCD Camera / New ICX834 for QHY 24 ?
« Last post by olivdeso on November 25, 2014, 07:26:21 PM »
The new Sony ICX834 may be verry interesting.

Same size as the ICX694, but with 12M pixels.
Of course the pixels are smalls : 3.1

It will require a short focal length and ratio and top quality optics.


Beyond that, now what is becoming very interresting  : in bin 2x2 mode, it is quite close to the KAF3200.

Very similar size, quantum efficiency, pixel size... but a much lower read noise.

The ICX834 seems to have an even smaller read noise than the ICX694 : about 3.5 e- in 1x1 bin and 5e- in 2x2 bin.




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