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Ultra portable EAA setup

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#1 nicknacknock

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Posted 30 September 2020 - 12:09 AM

I yielded and got the ASKAR FMA180mm lens. Always on the quest for smaller and easier. This allows me to use my AZ GTi without the extension, with only a 2 pound counterweight and using a smaller tripod. Here's how it looks ready to do business and here's everything (sans tripod) in the case I will use. I added a 30mm M48 extension to the front, to add as a dew shield and protect the filters I use (and cut down on glare), since the filters are screwed to the front end. Let's not talk sampling - I'll be using my ASI533 lol.gif  Regardless, it should work superbly for large objects as I get 3.6° x 3.6° with the 533. For small objects I'll be using my 5" SCT.

 

Hopefully I will be able to conduct limited testing tonight laugh.gif

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#2 GazingOli

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Posted 30 September 2020 - 12:28 AM

Looks great! Congrats. Hope to see some images soon.

 

CS.Oli


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#3 nicknacknock

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Posted 30 September 2020 - 12:30 AM

Planning to slap on the ZWO Duo band filter and see how it performs in my light polluted home location.

 

And then of course, take it to a dark site too laugh.gif



#4 alphatripleplus

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Posted 30 September 2020 - 08:03 AM

Looks like a very capable set-up, Nick. Can't wait to see some pics through that duo band filter.



#5 nicknacknock

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Posted 02 October 2020 - 02:41 AM

I took two shots just to test it. Focus a bit off, no darks, flats or bias with ASIAIr Pro and taken from my horrendous (when it comes to light pollution!) back yard.

 

Quite pleased with something like 5x3 seconds for M13 and 7x10 for the beginnings of the Elephant Trunk Nebula (using ZWO DuoBand for the second shot). Potential is there, calibration frames will help a lot (and my UV/IR for broadband objects of course). CN compression will not help the images, but whatever!

 

I will likely put this setup through its paces this weekend at a dark site smile.gif

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  • M13.jpg
  • Elephant Trunk.jpg

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#6 nicknacknock

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Posted 02 October 2020 - 02:41 AM

And yes, satellites galore...



#7 va1erian

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Posted 03 October 2020 - 11:15 PM

 Regardless, it should work superbly for large objects as I get 3.6° x 3.6° with the 533. For small objects I'll be using my 5" SCT.

 

The question is, what can one see with the 180 mm focal length lens and 1" camera ? Why not 50 mm or 400 mm ?

 

I am concerned that 180 mm will be too long for constellations, and too short for DSO like nebula.



#8 nicknacknock

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Posted 04 October 2020 - 08:56 AM

One can see plenty with whatever. This won't be my main rig. Probably stick with my 72mm at f4.8 with matching reducer.

 

The images were taken while there was a raging moon and tons of humidity, which basically negated most of the benefits of darks, flats and bias taken. Still, shows potential. 

 

I also used the ZWO Duoband Filter, but to be honest, I prefer either a UV/IR or the Baader Moon & Skyglow - which means when the moon is up, just do lunar and planetary related stuff instead of EAA with a huge lightbulb overhead lol.gif



#9 nicknacknock

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Posted 04 October 2020 - 08:56 AM

Heart Nebula

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#10 nicknacknock

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Posted 04 October 2020 - 08:57 AM

M8 & M20

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#11 nicknacknock

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Posted 04 October 2020 - 08:57 AM

NGC6888

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#12 nicknacknock

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Posted 04 October 2020 - 08:57 AM

North American and Pelican Nebula Complex

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#13 nicknacknock

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Posted 04 October 2020 - 08:58 AM

Pacman Nebula

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#14 nicknacknock

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Posted 04 October 2020 - 08:58 AM

Last but not least, entire Veil Nebula

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#15 nicknacknock

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Posted 04 October 2020 - 09:05 AM

So, the potential for any lens or scope is there, regardless of any size definitions.

 

For EAA, we only care about image scale, image resolution and focal ratio and how to mix these in order to see what we want to see laugh.gif

 

The ASKAR FMA180 has now shifted duties to be tested as a finderscope for traditional viewing needs while I test the 72mm f4.8. However, it was ridiculously easy to transport and set up - a fact that hath its own charms wink.gif

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#16 nicknacknock

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Posted 04 October 2020 - 09:05 AM

And yes, the moon was REALLY illuminating things, although this is a 3 sec exposure through the iPhone...



#17 alphatripleplus

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Posted 04 October 2020 - 12:54 PM

Very nice comparisons, Nick  -  the Lagoon and Trifid really punch through as very bright targets compared to the others.


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#18 nicknacknock

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Posted 05 October 2020 - 12:55 AM

Errol,

 

A lot has to do with how you play with the histogram during acquisition. Hence the lack of uniformity in illumination. Trust me, on my iPad screen, a lot more was visible. And also consider that these are stacks of 10 seconds at anything between 8 and 15 images. So, not much signal accumulated AND I was also getting noisy signal from the big round ball in the sky!


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