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NGC4501 Coma Berenices


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Great image Peter.

What exposure times  and binning per sub were you running on this.

Edited by Graham
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Peter Shah
1 hour ago, RonC said:

Another great image Peter!! 👍

Thank you....

 

50 minutes ago, Graham said:

Great image Peter.

What exposure times  and binning per sub were you running on this.

Thanks ....All of the subs were 600s on this ... I always bin this rig at 2x2,the focal length is 2853mm which gives it 1.3 arc sec per pixel. Anything under a second and its a waste even with deconvolution .....Next trip I am hoping to put some insulation down on the floor to see if I can improve the local seeing, especially in front of the optics.

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I must be missing something here Peter.

How the heck can you run 600 second subs without over exposing ????

I tried with my QSI .

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Peter Shah
2 hours ago, Graham said:

I must be missing something here Peter.

How the heck can you run 600 second subs without over exposing ????

I tried with my QSI .

This scope is F9 so is quite slow but the FLI PL16803 is a CCD and has really deep pixels around 100,000 ADU it copes really well.

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Been reading up on that camera of yours Peter.

Some pretty impressive specs, mind at £12.500 + they would want to be.

 

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Peter Shah
37 minutes ago, Graham said:

Been reading up on that camera of yours Peter.

Some pretty impressive specs, mind at £12.500 + they would want to be.

 

You can get them way cheaper than that now Cmos has made an appearance....it's an amazing sensor though

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