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Old 01-04-2008, 07:49 AM
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h0ughy (David)
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Following on from earthhour - the local light pollution

Last night I thought I would test out the new HEQ5 pro and christen the losmandy side by side saddle plate, the Orion 80mm shorty scope as the guide scope. I decided to use the 400D and the Russian fish eye lens I bought a while ago. Literally last minute decision, all I did was line up by eye the south pole with the mount, rough level (there is no bubble level on the HEQ5 pro) and just let the beast autoguide using the laptop. Crux of course is the views I have to the south and south west, the Orion one is obviously the western/northern view.



It is quite clear that the northern/western views are my darkest, but mate you have to use a light pollution filter of some description. I bought an astronomik internal canon CLS filter yesterday – hope it arrives today.



I need an observatory – took about 40 minutes to set up and the same to pull down, and I never spent time polar aligning or drift aligning, and this was a simple setup!! The images are crap, I did the best focus I could (I used focus assist) but the lens wont let everything come into focus at the same time for some reason, ie the outer edges are terrible!!



Anyway at least I can say I sampled this beaut weather we are having!!! BTw the images are a stack of three 230 second exposures at iso 400 – in a bog standard 400D. I certainly know the result would have been different with the cooled camera but I seem to have misplaced that one…….???? LOL

O how I wished I was going to SPSP this year........
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Old 01-04-2008, 07:58 AM
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iceman (Mike)
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What lens is that, Dave?

Also what is that on the left? Looks like glare from a light, rather than light pollution?
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Old 01-04-2008, 08:02 AM
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sheeny (Al)
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I see what you mean about the coma in that lens, HOughy.

I'm looking forward to moving out of town soon away from the light. I feel your pain...

Al.
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Old 01-04-2008, 08:16 AM
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h0ughy (David)
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Quote:
Originally Posted by iceman View Post
What lens is that, Dave?

Also what is that on the left? Looks like glare from a light, rather than light pollution?
I bought it off an IIS member here a while ago - cant remember off hand the make at the moment.

its a internal reflection from picking up a streetlight and the neighbours house lights.
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Old 01-04-2008, 08:26 AM
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Quote:
Originally Posted by h0ughy View Post
I need an observatory – took about 40 minutes to set up and the same to pull down, and I never spent time polar aligning or drift aligning, and this was a simple setup!! The images are crap, I did the best focus I could (I used focus assist) but the lens wont let everything come into focus at the same time for some reason, ie the outer edges are terrible!!


........
G'Day,
This might help this might help you out about $2400 Au delivered to you door
http://www.astrogizmos.com/Dome.htm

Cheers
Arthur

Last edited by nightsky; 01-04-2008 at 08:30 AM. Reason: wrong link
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Old 01-04-2008, 08:40 AM
Karlsson
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its a internal reflection from picking up a streetlight and the neighbours house lights.
Still - despite the LP the Coalsack made it into the image and so did the Dark Doodad... well, sort of...

Any idea what the greenish streak is, some 3° S of the pointers? Comet H0ugh...?
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Old 01-04-2008, 10:22 AM
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GTB_an_Owl (Geoff)
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you still have 3 days to pack the trailer Dave


geoff
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