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Join our unique resource for Olympus Four Thirds E-System DSLR and Pen and OM-D Micro Four Thirds photographers. Show your images via our free e-group photo gallery. Please read the e-group.uk.net forum terms and conditions before posting for the first time. Above all, welcome!


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Foto Fair Post your photos for friendly, non-critical feedback. This is the place to show pictures if you aren't yet ready for full-blooded critique, or simply want to share an interesting picture with other e-group visitors.

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  #181  
Old 13th November 2016
crimbo crimbo is offline
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Re: Astro Photos

Processing is always to taste
Hoope you dont mind that I pinched your Ivo image and tried some quick and dirty Rob Gendler ideas
Cannot admit to controlling the processing but I am coming to the conclusion that for most of us that PS will be part of the process for astro images

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  #182  
Old 13th November 2016
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Re: Astro Photos

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Originally Posted by crimbo View Post
Processing is always to taste
Hoope you dont mind that I pinched your Ivo image and tried some quick and dirty Rob Gendler ideas
Cannot admit to controlling the processing but I am coming to the conclusion that for most of us that PS will be part of the process for astro images
Can you share what steps you did in PS ?
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  #183  
Old 13th November 2016
crimbo crimbo is offline
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Re: Astro Photos

I copied the red channel in to the image as a layer and fiddled with that. Must admit I didnt take too much notice of what I was doing!
It was along the lines of filtered luminance http://www.robgendlerastropics.com/LRGB.html using the red channel
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  #184  
Old 13th November 2016
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Re: Astro Photos

Quote:
Originally Posted by crimbo View Post
Processing is always to taste
Hoope you dont mind that I pinched your Ivo image and tried some quick and dirty Rob Gendler ideas
Cannot admit to controlling the processing but I am coming to the conclusion that for most of us that PS will be part of the process for astro images
Don't mind at all Chris in fact I do like what you have done there are just so many ways to process astro images.
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  #185  
Old 18th November 2016
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Re: Astro Photos

I just had my first go at a night shot from our light polluted back garden. I used the 17mm f1.8 lens at f2.2 iso 640 and 10s exposure. I really hesitate to post anything in this thread but as it really is my very first attempt I'll post it and give you all a laugh. I kept the trees in the shot to illustrate the light pollution level from the local street lights and to be sure there would be something in the image if I didn't get any stars I think it was shot roughly pointing west so if anyone can ID any of the stars it would be nice to know what I've captured. I haven't tried any post processing I just reduced the file size to be able to post it on here. I'm quite pleased I actually got something, that in itself is encouragement enough to have another go sometime. Feel free to critique and provide advice, as you can see I will make use of it

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  #186  
Old 18th November 2016
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Re: Astro Photos

Looks pretty good considering the light pollution. You could probably "fix" that with some judicious tinkering with the colours

I think the small star cluster roughly on the intersection of the bottom and right thirds is the Pleiades. They don't look much to the naked eye but are superb through binoculars.

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  #187  
Old 18th November 2016
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Re: Astro Photos

Great start.
I might be wrong but I think you were pointing more South East. In your shot there is a small bright group of 7 stars about 1/4 way up from the bottom and about a 1/4 in from the right that I think is The Pleiades.

This is from Stellarium at the time your shot was taken.

[IMG][/IMG]


keep going.
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  #188  
Old 18th November 2016
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Re: Astro Photos

Stars are nice and sharp Phil good start. I would say your camera was pointing NE the small group of stars just above the clouds is the Pleiades Star Cluster.

If you want to know what you are looking at there is a really good bit of free software called Stellarium.
http://www.stellarium.org/en_GB/
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  #189  
Old 19th November 2016
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Re: Astro Photos

Guys you are correct it was definitely more East as our garden is South facing. Don't know why I typed West I had had a couple of glasses of wine when I posted so I'll blame that Stellarium looks pretty good must give that a go. Thanks for the IDs ypu've made me wish I'd got the long lenses and the telescope out now. At least I'll know where to look next time it's clear. The worst light pollution was from a street lamp over my shoulder, maybe I can get the council to put a shield on it? might take a while though I guess.
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Old 26th November 2016
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Re: Astro Photos

Had a go at The Pleiades last night.

Managed to capture some of the nebulosity but not happy with the eggy stars. My poor polar alignment!

[IMG][/IMG]
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  #191  
Old 26th November 2016
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Re: Astro Photos

Restacked and processed in Pixinsight. Think I like it better.

[IMG][/IMG]
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  #192  
Old 26th November 2016
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Re: Astro Photos

I like this image showing the dust. Whats your exposure image capture details that caused the star elongation?
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  #193  
Old 26th November 2016
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Re: Astro Photos

I was using 30 sec exposure at ISO 800 with the camera on an equatorial mount.
I took 154 exposures and used the best 50 for the stacking.

The problem was my polar alignment was way out (I think) So the mount was not helping, no guiding at all just trusted the mount.

I was also in a light polluted area outside our front window to get a shot at the Pleiades, the lights were on and the curtains open so it could have been better.

One thing for sure is the more shots you stack the lower the background noise.
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  #194  
Old 26th November 2016
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Re: Astro Photos

Polar alignments a real pain I know. I am able to keep an eye on the polar alignment during image taking as long as I do not touch the angled viewfinder. I do check it now as early on I have been know to choose the wrong polaris
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  #195  
Old 27th November 2016
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Re: Astro Photos

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Originally Posted by birdboy View Post
Polar alignments a real pain I know. I am able to keep an eye on the polar alignment during image taking as long as I do not touch the angled viewfinder. I do check it now as early on I have been know to choose the wrong polaris
I think thats exactly what I did. There are too many of them up there!
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