A quick sun test with a color(!) cam

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Gingerfish
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A quick sun test with a color(!) cam

Post by Gingerfish »

Wow, I did not expect any of this to work! But it did! :lol:

1) Color cams suck, and the IMX183 is bad for solar.

I fully expected this to be true! But when you bin 2x2, you lose color and end up with "mono". Althought the image is noisy, I did not see any grid problems. :o Of course, with a bigger sensor, the sweet spot is smaller. But that was expected.

2) BAD newton rings when Barlowing!

Considering how BAD the asi120 NR's, I expected the same - or worse here! But no. No tilt adapter was used! :D

3) A 1" sensor + Lunt B400 = baaaaaad vignetting!

I know I am using a 3x barlow, but wow :shock: I did NOT expect this! Should I even bother looking for a bigger blocking filter?

I still need to fix a couple of things. I had moved the focuser on the donor scope out 22mm, and I did not spot this until I was done. So I can hopefully get a bit more out of the etalon!

The QHY183c is a heavy beast, so there is some droop. If I can sort this out, the sweet spot should be better centered.

All in all, I am happy! I was going to get a new camera, but now I might wait.

Image

Image

Image


Clear sunny skies!
Chris

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Re: A quick sun test with a color(!) cam

Post by DeepSolar64 »

That last one turned out really nice!!


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Re: A quick sun test with a color(!) cam

Post by rcwinter »

:bow2 :bow2 Considering what you advised, I like them, congrats , great effort. Richard


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Re: A quick sun test with a color(!) cam

Post by Gingerfish »

Thanks!

Yes, my best image so far! :D


Clear sunny skies!
Chris

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Re: A quick sun test with a color(!) cam

Post by Gingerfish »

Here is a quick animation of the 17 images I got.

Image


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Chris

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Re: A quick sun test with a color(!) cam

Post by marktownley »

Came out ok against the odds. Try sharpening with fewer iterations to reduce image noise.


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Re: A quick sun test with a color(!) cam

Post by Gingerfish »

Thanks you! I think most of it is "gif noise", as the .avi doesn't have it. But I don't want to upload a 1 sec vid :p


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Chris

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Re: A quick sun test with a color(!) cam

Post by solarnoob »

Great progress, thanks for sharing.

Frank


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Re: A quick sun test with a color(!) cam

Post by MAURITS »

Well done.


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Re: A quick sun test with a color(!) cam

Post by Montana »

Wow!! well done :bow :movie the animation is brilliant!

Alexandra


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Re: A quick sun test with a color(!) cam

Post by Boso36 »

Very interesting Gingerfish/Chris,
What file format did you record in, 8 or 16 bit, AVI or SER, Sharpcap or Firecapture.
It would be interesting to see if you did not bin, and just extract about 50 image files (the best quality) as .tiff files, then extract the red channel from that and see if you can stack those...
Where can I find out about your solarscope (LuntAltair scope ??), impressive images.


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Re: A quick sun test with a color(!) cam

Post by Gingerfish »

Thank you all!

Boso36,
I use SharpCap, 8 bit, and I think it defaulted to .SER files. I bin for two reasons. Because I use a 3x Barlow, binning 2x2 gives me a nice resolution of 0.46"/pixel. Unbinned gives me a resolution of 0.23"/pixel. which is WAY overkill for my seeing. The second reason was to avoid grid artifacts.

The mod is simple enough, a stage 1 I think they call it. I copied this:

https://imagesofoursun.wordpress.com/eq ... o-triplet/


Clear sunny skies!
Chris

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