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First M-1 Attempt

astrophotography beginner dslr
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#1 Blackbelt76

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Posted 14 January 2020 - 10:32 PM

Would enjoy hearing from those with far more experience than myself what my next steps should be

or how I could improve this with the equip I'm using?

 

I'll eventually get into auto guiding, plate solving etc, though not til late spring

 

I've been unable to visually see M-1 thru my 9.25 Celestron; no doubt due to sky glow to my east.

Curious, I went out tonight, did a polar scope only alignment  to see if I could capture it.

 

I was pleased to say the least for my first attempt.

Focusing was difficult, but did the best I could using live view magnified and manually focusing.

 

Equip:

 

Nikon D300s APS-C, Un-moded

200mm f/2.8..Image shot at f/4, 90 secs unguided x10

No Flats used, only Lights, Darks and Bias.

Mount: Skywatcher EQ6R.

 

DSS to register and stack.

 

My post was all done in Adobe, though I know I have a long way to go here.

Primarily adjusted Levels, RGB curves, Noise reduction, Blend layer mask for hue/sat, unsharp mask.

I'm scaling the final image to increase it's size, though not sure if this is the best way?

Attached Thumbnails

  • Crab-1.jpg
  • Crab-2.jpg

Edited by Blackbelt76, 14 January 2020 - 10:39 PM.

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#2 Gipht

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Posted 14 January 2020 - 10:54 PM

There does not seem to be any color in the posted picture?    Maybe  something happened in the posting process?

 

Focus is one key in getting a better picture.  They do make Bahtinov masks for camera lenses.

 

M1 is a challenging target,  especially at a 200mm focal length.   M31, M42, or M45  are available this time of year and would be an easier place to start.


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#3 Blackbelt76

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Posted 14 January 2020 - 11:01 PM

There does not seem to be any color in the posted picture?    Maybe  something happened in the posting process?

 

Focus is one key in getting a better picture.  They do make Bahtinov masks for camera lenses.

 

M1 is a challenging target,  especially at a 200mm focal length.   M31, M42, or M45  are available this time of year and would be an easier place to start.

True; I didn't see any color in the original NEF image.

I don't know if I can capture color w/o a filter and un-moded DSLR?

Manually focusing a 200mm away from "so called" infinity is tricky.

My focus may have slipped during the evening; I probably should have placed a piece of tape on the focus ring. :)


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#4 Gipht

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Posted 14 January 2020 - 11:17 PM

The stars should have some color with your camera even unmodified and without a filter.   Maybe try adding more color saturation?

 

Manually focusing a camera lens is tricky, and the correct focus can change as temperatures drop.  Sometimes the seeing is poor too, and that can  cause a blur.  The wider field looks fairly good focus wise.


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#5 happylimpet

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Posted 22 January 2020 - 09:42 AM

Great work! Well done for maximising what your equipment is capable of - thats where the fun and excitement is.



#6 mackiedlm

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Posted 22 January 2020 - 05:27 PM

You've done really well to get a recognizable M1 in a 200mm lens. 

 

I use a canon and Backyard EOS from O telescopes to focus. The do the same software for Nikon and a good free trial. Give it a go.

 

+1 for something bigger and brighter as a start point, M31 should be good at 200mm. M42 likewise but can be difficult because the core is so bright.

 

Good luck.



#7 Blackbelt76

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Posted 23 January 2020 - 04:26 PM

Great work! Well done for maximising what your equipment is capable of - thats where the fun and excitement is.

Thanks.

That will be my motivation for a while until the weather improves.

I'd like to push my APS-C dslr sensor and 200mm to their limits in what I can capture w/o auto guiding, Ha filters etc...

 

Will be experimenting with the longest possible unguided exposure with the lowest iso and hopefully find

a happy medium. I am also curious if PEC training will make a difference up to what will probably be a 5 min unguided limit with the EQ6R-Pro.

 

The learning curve is fun for me, and reproducible results are even more rewarding.




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