TheSkySearchers

Posted: **Tue Jul 16, 2019 2:41 am**

So here is a daylight image from my ZWO ASI120MC and as you can see there are a lot of spots (of something) showing in the image. I circled all the spots in red.

The problem is that I have cleaned the glass cover over the sensor and it is spotless as far as I can tell. Not sure what to do next.

Thanks,
JT

Posted: **Tue Jul 16, 2019 3:18 am**

I think UlteriorModem had this same issue last year perhaps(?) and it was dust under the sensor cover I believe.

Posted: **Tue Jul 16, 2019 3:27 am**

I assume you were using a scope. Any dust there? Typically the smaller the dust spots are the further away from the sensor. It would appear these were either on the IR filter or sensor cover (either inside or outside. You need to avoid cleaning the sensor itself if you can help it.

Posted: **Tue Jul 16, 2019 4:19 am**

The sensor is covered by a piece of glass. It appears to be sealed. I see no way of getting past that glass to the sensor. I’ve inspected that piece of glass under a high intensity light and I can see nothing on it.

Still wondering what to do,
JT

Posted: **Tue Jul 16, 2019 4:54 am**

Flat frames? That's about all I got left....

Posted: **Wed Jul 17, 2019 4:05 am**

Well, apparently if you get off your lazy butt and do a little homework, you'll find that the manufacturer has put out a publication specifically addressing cleaning your ZWO ASI camera.

All done, it was almost stupidly easy, and no more dirt!

Cheers,
JT

Posted: **Wed Jul 17, 2019 4:19 am**

JayTee wrote: ↑Wed Jul 17, 2019 4:05 am Well, apparently if you get off your lazy butt and do a little homework, you'll find that the manufacturer has put out a publication specifically addressing cleaning you ZWO ASI camera.

All done, it was almost stupidly easy, and no more dirt!

Cheers,
JT

Wow JT.
I looked that up and read it. That is really great that this can be done. Now I just need that camera. :-)

Thank you for this educational post.
Maybe you could sticky those instructions somewhere.

Posted: **Sun Jul 28, 2019 5:07 pm**

I have had dust almost in focus on the focal reducer and field flattener. That is a possibility

Posted: **Sun Jul 28, 2019 5:37 pm**

JayTee wrote: ↑Wed Jul 17, 2019 4:05 am Well, apparently if you get off your lazy butt and do a little homework, you'll find that the manufacturer has put out a publication specifically addressing cleaning your ZWO ASI camera.

All done, it was almost stupidly easy, and no more dirt!

Cheers,
JT

Hello,

Did I miss something? At face value, this seems like a pretty hostile answer to a reasonable question. I suspect that there are no lazy butts involved since someone took the time to circle features of interest and post a picture.

My understanding of public forums is that no one is required to participate in a conversation if they do not want to. Shouldn’t this be a place where we enjoy talking about a shared hobby together? I am disturbed that this response got “likes” from other admins/mods. Is this the tone this newish forum is going to take?

Best,
Brian

Posted: **Sun Jul 28, 2019 5:43 pm**

I saw this report on cleaning a ZWO camera. Perhaps your camera is similar:

https://astronomy-imaging-camera.com/ma ... iccant.pdf

Posted: **Sun Jul 28, 2019 5:48 pm**

Brian wrote: ↑Sun Jul 28, 2019 5:37 pm
JayTee wrote: ↑Wed Jul 17, 2019 4:05 am Well, apparently if you get off your lazy butt and do a little homework, you'll find that the manufacturer has put out a publication specifically addressing cleaning your ZWO ASI camera.

All done, it was almost stupidly easy, and no more dirt!

Cheers,
JT
Hello,

Did I miss something? At face value, this seems like a pretty hostile answer to a reasonable question. I suspect that there are no lazy butts involved since someone took the time to circle features of interest and post a picture.

My understanding of public forums is that no one is required to participate in a conversation if they do not want to. Shouldn’t this be a place where we enjoy talking about a shared hobby together? I am disturbed that this response got “likes” from other admins/mods. Is this the tone this newish forum is going to take?

Best,
Brian

Hi Brian! JayTee is referring to himself with his lazy butt comment. He is the original poster of the thread and is essentially replying to himself here.

It is a self-deprecating humorous retort.

I always appreciate self-deprecating humor. I find it to be a respectable trait.

Posted: **Sun Jul 28, 2019 6:41 pm**

I see, I missed that. Must have gotten too little sleep after last night’s session. In that case all is fine

Posted: **Sun Jul 28, 2019 9:46 pm**

Apologies for my confusion JT.

Posted: **Mon Jul 29, 2019 6:32 pm**

JayTee wrote: ↑Wed Jul 17, 2019 4:05 am Well, apparently if you get off your lazy butt and do a little homework, you'll find that the manufacturer has put out a publication specifically addressing cleaning your ZWO ASI camera.

All done, it was almost stupidly easy, and no more dirt!

Cheers,
JT

Hey JT,

Would you mind sharing a link to the info? Sorry if I missed it in the thread...

fat

Posted: **Mon Jul 29, 2019 11:38 pm**

Bryan put up a good one about 4 frames up... I got spots on my guide camera... Now I know how to get rid of them.

Thanks, Bryan....

Posted: **Mon Jul 29, 2019 11:42 pm**

Yep, the document Brian linked to above is the one I used.

Cheers,
JT

Posted: **Tue Jul 30, 2019 1:52 am**

I don't have that camera, but I do know about dust bunnies. They are everywhere and impossible to completely get rid of. That's why we do flat frames!
But it's always good to start clean if you can. I clean my primary objective on my refractor once every year or so.

TheSkySearchers

Help!! I've Got Dirt!!!

Help!! I've Got Dirt!!!

Re: Help!! I've Got Dirt!!!

Re: Help!! I've Got Dirt!!!

Re: Help!! I've Got Dirt!!!

Re: Help!! I've Got Dirt!!!

Re: Help!! I've Got Dirt!!!

Re: Help!! I've Got Dirt!!!

Re: Help!! I've Got Dirt!!!

Re: Help!! I've Got Dirt!!!

Re: Help!! I've Got Dirt!!!

Re: Help!! I've Got Dirt!!!

Re: Help!! I've Got Dirt!!!

Re: Help!! I've Got Dirt!!!

Re: Help!! I've Got Dirt!!!

Re: Help!! I've Got Dirt!!!

Re: Help!! I've Got Dirt!!!

Re: Help!! I've Got Dirt!!!