M42 - First LRGB Capture  

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(@simon_rl)
Brown Dwarf Customer
Joined:1 year  ago
Posts: 8
December 21, 2017 15:38  

This is my first LRGB capture with ASI1600 MM-C with Optolong filters. Obviously fully processed and combined in APP with some very minor tweaks in Lightroom.

combine RGB image  8degCCW 1.0x LZ3 NS csc St


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(@mabula-haverkamp-administrator)
Quasar Admin
Joined:1 year  ago
Posts: 1632
December 23, 2017 16:49  

Vey nice Simon 😉 !

Looks very nice and smooth...

Do you have more details, like which telescope and integration times per channel ?

Mabula

 

Main developer of Astro Pixel Processor and owner of Aries Productions


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(@simon_rl)
Brown Dwarf Customer
Joined:1 year  ago
Posts: 8
December 26, 2017 14:17  

Hi Mabula,

Apologies in my excitement to share my photo I forgot to include the details:

Telescope: Explore Scientific 127mm ED APO Essential Series

Mount: SkyWatcher AZ-EQ6

Camera: ZWO ASI1600MM - Cooled

Guiding: OAG, with ZWO 120MM-S

Filters: Optolong 36mm unmounted LRGB

Gain: 0 - After the level of noise in the image I wish I used unity gain (139) as most people advise.

I cannot remember details of exposures.

Darks, flats and bias subtracted.

Simon.


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(@gregwrca)
Neutron Star Customer
Joined:1 year  ago
Posts: 208
December 28, 2017 19:46  

Nice image.  We have the same telescope and guidescope camera 👍

GW


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(@simon_rl)
Brown Dwarf Customer
Joined:1 year  ago
Posts: 8
December 29, 2017 00:35  
Posted by: Greg

Nice image.  We have the same telescope and guidescope camera 👍

Thanks Greg. How do you like your ES 127mm. I love mine, for what they cost they are fantastic and the image quality is not far behind the better scopes. I use a TS field flattener with mine and I find I get perfect stars across the whole frame.


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(@mabula-haverkamp-administrator)
Quasar Admin
Joined:1 year  ago
Posts: 1632
December 29, 2017 00:58  
Posted by: Simon

Hi Mabula,

Apologies in my excitement to share my photo I forgot to include the details:

Telescope: Explore Scientific 127mm ED APO Essential Series

Mount: SkyWatcher AZ-EQ6

Camera: ZWO ASI1600MM - Cooled

Guiding: OAG, with ZWO 120MM-S

Filters: Optolong 36mm unmounted LRGB

Gain: 0 - After the level of noise in the image I wish I used unity gain (139) as most people advise.

I cannot remember details of exposures.

Darks, flats and bias subtracted.

Simon.

Thank you Simon for sharing the details 😉

In my experience, the gain 0 setting is good for longer exposure times though 😉 i have an asi1600 myself and have shot some excellent images with gain 0.  I think the sweetspot is somewhere between gain 0 and gain 139 though...still nice dynamic range and pretty low read noise. With gain 139, the dynamic range starts to get really tight I feel. But then again, if you combine plenty of images, the dynamic range will increase from that. So it does depend a bit on the target that you're shooting on which gain to use. For a high dynamic range object like M42, I would suggest to use a lower gain then 139 😉

Cheers,

Mabula

 

 

Main developer of Astro Pixel Processor and owner of Aries Productions


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(@gregwrca)
Neutron Star Customer
Joined:1 year  ago
Posts: 208
December 29, 2017 08:16  
Posted by: Simon
Posted by: Greg

Nice image.  We have the same telescope and guidescope camera 👍

Thanks Greg. How do you like your ES 127mm. I love mine, for what they cost they are fantastic and the image quality is not far behind the better scopes. I use a TS field flattener with mine and I find I get perfect stars across the whole frame.

Indeed, well crafted. Love it.  Am replacing the focuser though, as mine tends to lose focus too often when imaging, and not so good for an autofocus motor.  I have been looking for a well matched FR/FF for it. Funny ES doesn't really have one. What is this TS model?

GW


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(@simon_rl)
Brown Dwarf Customer
Joined:1 year  ago
Posts: 8
January 9, 2018 15:59  
Posted by: Greg
Posted by: Simon
Posted by: Greg

Nice image.  We have the same telescope and guidescope camera 👍

Thanks Greg. How do you like your ES 127mm. I love mine, for what they cost they are fantastic and the image quality is not far behind the better scopes. I use a TS field flattener with mine and I find I get perfect stars across the whole frame.

Indeed, well crafted. Love it.  Am replacing the focuser though, as mine tends to lose focus too often when imaging, and not so good for an autofocus motor.  I have been looking for a well matched FR/FF for it. Funny ES doesn't really have one. What is this TS model?

Hi Greg,

I upgraded my focuser to a Moonlite with stepper motor and am very happy with the quality of Moonlite.

Here's a link to the field flattener https://www.teleskop-express.de/shop/product_info.php/info/p1010_TS-Optics-PHOTOLINE-APO-Flattener-Corrector-for-Refractror-Telescopes.html


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(@gregwrca)
Neutron Star Customer
Joined:1 year  ago
Posts: 208
January 10, 2018 00:24  

Funny, I'm waiting on my 3" FT also. Ordered mine in November! I'll check out the FF link. Are you at F/7.5?

 

GW


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(@gregwrca)
Neutron Star Customer
Joined:1 year  ago
Posts: 208
January 10, 2018 00:27  

Argh, I don't read German. I'll check in the US.

GW


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(@simon_rl)
Brown Dwarf Customer
Joined:1 year  ago
Posts: 8
January 15, 2018 07:22  
Posted by: gdwats@comcast.net

Argh, I don't read German. I'll check in the US.

There is an English version of the web page. Just click on the UK flag near the top right hand corner of the page.


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