ASI 1600 Verticle Stripes in Darks

[woodsie]

iCCD Image 4.fit have recently bought a ZWO 1600 Pro camera and just shooting a few random darks i can see a very prominent set of verticle stripes is this a defect. The camera has not seen first light ye

 

Woodsie

Edited November 9, 2019 by woodsie
add pic

[vlaiv]

Could be due to low offset. What offset value are you using?

[vlaiv]

Oh dear,

Not sure what happened here - ASI1600 PRO camera has 4656×3520 resolution.

Sub that you attached in your post is in fact: 5496x3672 pixels. It also says from fits header that it has 2.4um pixel size - while ASI1600Pro has 3.8um pixel size.

Stats from fits header correspond to ASI183 - did you attach wrong sub by any chance, or maybe you made mistake in model of your camera?

In any case offset is wrong, there is clipping to the left as histogram of your dark sub shows:

There is something wrong with sub regardless of all of that - here is what it looks stretched - almost half of it is very brighter than the rest.

It should not look like that. It might be due to capture application, but there might be a fault in camera. What capture app did you use?

 

[discardedastro]

It's in the FITS headers, MaxIm DL. MaxIm also puts the licensed user name in the header as well as the serial number - that's not great!

Looks absolutely on the money for an ASI183xx, having one myself, and the FITS header reports 2.4um pixel size which is a match. But definitely something wrong there as pointed out above. For a 50 second dark frame on an ASI183 you'd expect to see the usual bloom on the centre right hand of the image.

[woodsie]

Thanks red dwarf for your reply. Yes the camera is a 183 dont know why i put 1600.

 

[woodsie]

2 hours ago, vlaiv said:

Oh dear,

Not sure what happened here - ASI1600 PRO camera has 4656×3520 resolution.

Sub that you attached in your post is in fact: 5496x3672 pixels. It also says from fits header that it has 2.4um pixel size - while ASI1600Pro has 3.8um pixel size.

Stats from fits header correspond to ASI183 - did you attach wrong sub by any chance, or maybe you made mistake in model of your camera?

In any case offset is wrong, there is clipping to the left as histogram of your dark sub shows:

There is something wrong with sub regardless of all of that - here is what it looks stretched - almost half of it is very brighter than the rest.

It should not look like that. It might be due to capture application, but there might be a fault in camera. What capture app did you use?

 

 

[woodsie]

Hi Starforming

Any advice as to what I should do next ie contact ZWO send it back to telescope express ?

Quote

 

 

[vlaiv]

13 minutes ago, woodsie said:

Hi Starforming

Any advice as to what I should do next ie contact ZWO send it back to telescope express ?

It's a bit hard to tell who you are referring to in your post. Don't use "rank" but rather screen name of person you are referring to.

It would also be helpful if you quote someone to actually write why you are quoting them. For example, in your post above, you quoted my topic without any text on your part. I have no idea if that was by accident or something else. If you want to mention someone without quoting them here on SGL - there is simple mechanism for doing so - just put "at sign" before their screen name like:

@woodsie

They will get notification that you mentioned them and can respond.

As for returning the camera, maybe try couple of things first and see if that sorts out the problem:

1. Try using different capture software. There are couple of free alternatives out there that use ASCOM drivers: NINA (night time imaging or something like that), SIPS - Scientific Image Processing Software by Moravian instruments - I was using that but had some similar issues with ASI1600 - image was written in wrong format and broken, there is Sequence Generator Lite that is free (free version of SGP), and I'm sure there are other software as well.

Not sure what you are currently using, but its worth trying other software to see what results you will get

2. Try setting your offset properly in ASCOM driver - that should solve issues with stripes and could possibly deal with strange part of the image as well. Set it to somewhere around 50-60.

3. Maybe try reinstalling drivers or use another computer. Above issue might be related to USB port on your computer (not likely but worth a shot).

Once you try with different settings and still can't manage to solve the problem - yes, contact Telescope Express and ask for exchange or refund - whatever you prefer.