QHYCCD

294C frame size with 21.02.26 all-in-one package

294C frame size with 21.02.26 all-in-one package
« on: March 23, 2021, 03:18:24 PM »
Hi,

I'm having strange frame size and perhaps overscan issues with my QHY294C (non Pro Version) and the the latest driver 21.02.26 all-in-one package.

Prior to this update I had a maximum frame size of 4164 x 2796 pixel in SharpCap with any older driver version.
With the 21.02.26 Version I get 4164 x 2822 and there is no entry for 4164 x 2796 in the dropdown.

In my light and flat frames taken with SharpCap with the 21.02.26 driver I notice a dark pixel border at the very left side, as if part of the overscan area is included in the frame. I never got this border with older drivers in SharpCap.

With SGP using the ASCOM driver of the 21.02.26 all-in-one package I'm getting 4164 x 2796.
So the same size I used to get in SharpCap with the older drivers.
Even though the frame width is the same, I don't get the dark border with SGP and the ASCOM driver.

So I wonder what is the correct full frame size for the 294C and what causes the dark border, which I didn't have with older versions and which doesn't exist in the SGP frames?

best regards
Bernd

Re: 294C frame size with 21.02.26 all-in-one package
« Reply #1 on: March 23, 2021, 08:53:38 PM »
Hi,
    We updated driver and SDK in 21.02.26 version package,now QHY294C's functions is same with QHY294PROC's 11MP mode.So its resolution is 4164 * 2822.
    About SharpCap and SGP overscan issue,please send a flat image to me,any format.And please use EZCAP_Qt check the firmware version,it will be shown on EZCAP_Qt's title.
Best Regards,
QinXiaoXu

Re: 294C frame size with 21.02.26 all-in-one package
« Reply #2 on: March 25, 2021, 02:28:37 PM »
Hi,

I've attached a screnshot of the EZCAP_Qt title bar showing the firmware (Firmware.PNG)
Out of curiosity I captured a frame with EZCAP_Qt and it was 4164 x 2795 in size with "Ignore Overscan Area" checked in the file menu.

As to ASCOM I've cheked out the camera properties with Profile Explorer, it also reports 4164 x 2795 which I think explains the frame size I got in SGP (ascom.JPG)

The attached Flat frame in Flats_00003.zip is taken with SharpCap, it is 4164 x 2822 in size and has the dark border at the very left and also a strange patern at the bottom.

best regards
Bernd

Re: 294C frame size with 21.02.26 all-in-one package
« Reply #3 on: March 25, 2021, 08:44:33 PM »
Hi,
    I checked the image,but I'm not sure what is "strange patern at the bottom" you said,could you mark it?
Best Regards,
QinXiaoXu

Re: 294C frame size with 21.02.26 all-in-one package
« Reply #4 on: March 26, 2021, 02:47:06 PM »
    I checked the image,but I'm not sure what is "strange patern at the bottom" you said,could you mark it?

Hi,

You can see it in the picture of my orginal post, but I marked it here to make it clear.
It's visible when you zoom all the way in, e.g. 10:1.

The dark border at the left has two pixel width.
And the border which I described as "strange pattern" has a height of 2 pixels.

The last but one pixel row above is simply vertically repeated which leads to an invalid bayer pattern in these last 2 rows.

I hope it's clear now what I mean. I'm using PixInsight but I suppose that it can be ssen in any other application too if you zoom in enough so that you can inestigate at pixel level.

best regards
Bernd

Re: 294C frame size with 21.02.26 all-in-one package
« Reply #5 on: March 28, 2021, 08:15:45 PM »
    OK,I will check it,please wait some time.
Best Regards,
QinXiaoXu

Re: 294C frame size with 21.02.26 all-in-one package
« Reply #6 on: April 13, 2021, 04:38:21 AM »
    OK,I will check it,please wait some time.
Best Regards,
QinXiaoXu

Hi,

Sharpcap has a "live mode" and a "still mode". When recording in live mode, the image size is 4164 x 2822 pixels. In still mode, the image size is 4164 x 2796 pixels. Everything with the latest drivers, sdk and Sharpcap 4.0.

I noticed this when I recorded the lights in still mode and the darks, flats and bias in live mode. The frames did not fit together during processing.

Regards
Marcel

Re: 294C frame size with 21.02.26 all-in-one package
« Reply #7 on: April 13, 2021, 10:01:25 PM »
Hi,
    I tested this,the still mode is single mode,and SharpCap setuped ROI with effective area,so you get 4164 x 2796 under still mode.
Best Regards,
QinXiaoXu