First solar shot ASI290

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george9
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First solar shot ASI290

Post by george9 » Sun Apr 14, 2019 11:40 pm

I have to say that I am amazed at the ease of use with an ASI290 I bought on a NEAF sale. My goal is realtime viewing of CaK since I cannot see it. I guess I will end up getting pulled into imaging. But even with just the ASI capture utility, with my PC in the bright sunlight so I could not focus well, my view blew away my R2 image. Not shown in these images well, but the light bridge (not sure if that is what it is called) in the umbra was obvious on the PC.

These are single raw frames on a 70MM Pronto, Lunt B1200 CaK, PST#1, ASI290. I'll figure out how to optimize later. Oh, the large slightly darker regions on the disk are actually passing high clouds not NR or inherent unevenness. Can't wait to put it on a bigger scope, block the sunlight for the PC, figure out FireCapture.

George
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ffellah
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Re: First solar shot ASI290

Post by ffellah » Sun Apr 14, 2019 11:57 pm

Very nice first results, George

Franco

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Bob Yoesle
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Re: First solar shot ASI290

Post by Bob Yoesle » Mon Apr 15, 2019 12:57 am

Looks great George!
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marktownley
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Re: First solar shot ASI290

Post by marktownley » Mon Apr 15, 2019 8:33 am

That's a good result George from your new toy! I'm very much feeling the urge to get one of these cameras; fast frame rate and small pixels optimised for f15 has potential for some closeup CaK and white light views.
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george9
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Re: First solar shot ASI290

Post by george9 » Mon Apr 15, 2019 1:06 pm

Thanks, guys. Those are pretty much my first astronomical images, other than the R2 video and iPhone snaps at the eyepiece. I cannot imagine the difficulty of film.

The cameras are still on sale, and if you call High Point, they may still subtract the additional NEAF discount (but I guess this won't work for UK).

George

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marktownley
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Re: First solar shot ASI290

Post by marktownley » Mon Apr 15, 2019 1:43 pm

The UK has an 'Easter sale' on ZWO cameras till the end of the month, i'm tempted by one...
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Re: First solar shot ASI290

Post by marktownley » Mon Apr 15, 2019 9:11 pm

I did some modelling of my different sensors and setups here https://astronomy.tools/calculators/field_of_view/ to give me an idea the sort of FOV the asi290 would give me...
astronomy_tools_fov (1).png
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PDB
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Re: First solar shot ASI290

Post by PDB » Tue Apr 16, 2019 5:44 am

Not only FOV that counts in this case Mark. The IMX has 3.75µm pixels. So with the TAl to get same resolution you would need 1.3x barlow limiting the FOV again. (For me that 290 and the TAL at f/10 looks a good choice. (Maybe undersampled in blue,but red should be ok fro Nyquist. Altthough tendency seems to be to go higher these days ...)

Paul

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