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M31 - Canon 400mm F4/ZWO1600mm Combo

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15 replies to this topic

#1 stryker66

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Posted 18 June 2019 - 07:41 PM

RGB Channel only and no Luminance..

2UQUm1.jpg
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#2 FiremanDan

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Posted 18 June 2019 - 07:55 PM

Nice. Anymore details? How many subs? 



#3 stryker66

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Posted 18 June 2019 - 09:06 PM

Nice. Anymore details? How many subs? 

 

12 x 600s RGB
26 x 480s RGB
14 x 300s RGB

about 6.6hrs total

 


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#4 WSChurch

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Posted 18 June 2019 - 09:28 PM

Sometimes WOW! isn't enough. I really appreciate your dedication to the art and science of AP! waytogo.gif


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#5 View2

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Posted 18 June 2019 - 10:06 PM

Almost laughed when I saw "anymore detail?" Very nice job!
I've got the 1600mc and thought about trying this. How much is the lens adapter for canon?

Edited by View2, 18 June 2019 - 10:07 PM.


#6 kisstek

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Posted 19 June 2019 - 12:25 AM

Almost laughed when I saw "anymore detail?" Very nice job!
I've got the 1600mc and thought about trying this. How much is the lens adapter for canon?

$38 for the EFW version. That gives me the lens, adapter, EFW, and ASI1600 in the image train.


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#7 stryker66

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Posted 19 June 2019 - 07:12 AM

Almost laughed when I saw "anymore detail?" Very nice job!
I've got the 1600mc and thought about trying this. How much is the lens adapter for canon?

Oh hahaha, pretty much those are my acquisition details, no Luminance. About processing, I have 20darks and a master BIAS of 200frames. I stacked in Pixinsight then use DBE to remove vignette then save as a TIFF then ported to lightroom and process there. I usually just do finishing touches in LR since I usually do most on it but this one needs more spot details pull due to missing flats..


Edited by stryker66, 19 June 2019 - 07:13 AM.


#8 Kevin Ross

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Posted 19 June 2019 - 02:46 PM

Very nice image, terrific detail, well done! Although on my screen it looks a bit too red, but that's not a big deal.

 

I actually just ordered the ZWO EOS lens adapter last week myself, to connect my 400mm f/5.6 lens to my EFW and asi1600mm. Seeing your results is quite encouraging for me. Although I'm so spoiled by autofocus with my Moonlite focuser, I don't know how I'll feel about going back to manual focus with a Bahtinov mask. Especially since manual focus on camera lenses is iffy at best. But we'll see how it goes.


Edited by Kevin Ross, 19 June 2019 - 02:47 PM.


#9 stryker66

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Posted 19 June 2019 - 08:48 PM

Very nice image, terrific detail, well done! Although on my screen it looks a bit too red, but that's not a big deal.

 

I actually just ordered the ZWO EOS lens adapter last week myself, to connect my 400mm f/5.6 lens to my EFW and asi1600mm. Seeing your results is quite encouraging for me. Although I'm so spoiled by autofocus with my Moonlite focuser, I don't know how I'll feel about going back to manual focus with a Bahtinov mask. Especially since manual focus on camera lenses is iffy at best. But we'll see how it goes.

I use Nucleus Tilta for remote focuser for the canon lens as shown here. 

https://www.youtube....h?v=XcKTUIMWTlQ

I have two on both ends, the middle is manual but it is meant for Ha or LUM only..
 

2USkK.jpg


Edited by stryker66, 19 June 2019 - 09:07 PM.


#10 james7ca

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Posted 19 June 2019 - 09:30 PM

I'd agree with Kevin, seems a bit too red/orange which may be overriding the blue in the spiral arms. However, that mismatch between the RGB exposure times will probably make the color balance a bit more difficult. You might try a LinearFit (under ColorCalibration > LinearFit) on each channel before you create the RGB image.

 

Also, what kind of sky conditions, since 6.6 hours at f/4 on M31 is a fairly good amount of integration time. And, as always, light pollution can make color calibration more difficult and color balance is certainly a personal preference (i.e. borders on pure opinion).



#11 vidrazor

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Posted 19 June 2019 - 09:43 PM

Very nice. Any reason for going with the red motif? I know this is all artistic license, but I've not seen a rendering like this before.



#12 Michael Covington

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Posted 19 June 2019 - 09:57 PM

That picture is mirror-imaged.



#13 stryker66

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Posted 19 June 2019 - 10:02 PM

Very nice. Any reason for going with the red motif? I know this is all artistic license, but I've not seen a rendering like this before.

This is how I remember viewing it, very slight hint of blue but mostly orange..



#14 stryker66

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Posted 19 June 2019 - 10:05 PM

I'd agree with Kevin, seems a bit too red/orange which may be overriding the blue in the spiral arms. However, that mismatch between the RGB exposure times will probably make the color balance a bit more difficult. You might try a LinearFit (under ColorCalibration > LinearFit) on each channel before you create the RGB image.

 

Also, what kind of sky conditions, since 6.6 hours at f/4 on M31 is a fairly good amount of integration time. And, as always, light pollution can make color calibration more difficult and color balance is certainly a personal preference (i.e. borders on pure opinion).

It is maybe how I view it 2 yrs back on my refractor so I reproduce how I see it on my stellarvue. I am on bortle 6 skies..



#15 james7ca

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Posted 19 June 2019 - 10:24 PM

...I am on bortle 6 skies..

I'm about the same (on the light pollution). Here is a link to what I got using an 80mm f/4.8 refractor in about 3.5 hours with a mirrorless APS-C camera.

 

  https://www.cloudyni...dpost&p=9308385


Edited by james7ca, 19 June 2019 - 10:25 PM.


#16 17.5Dob

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Posted 19 June 2019 - 11:47 PM

Nice details, but why the monochrome red ?




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