Silver dollar an hour.....

[Peter Ward]

Telescope time seems to be so hard to get these days...but I literally had a couple of spare hours last night...: but what to image. :question:

NGC 253 was nicely placed...so what the heck.

No heroic exposure times here, literally an hour....from the 'burbs of Sydney to boot.

I think the Honders did a remarkable job just the same. (heroic exposure times may subsequently follow :) )

The link is here (http://www.atscope.com.au/BRO/gallery269.html)

[alpal]

What a great shot from the suburbs.

[Peter Ward]

Ta... as an aside I gave a presentation at Sydney Observatory last Monday on that very subject of "urban imaging".

You can go remarkably deep, required exposure time being the main penalty :thumbsup:

[Spookyer]

good work!

[pvelez]

Peter

do you have notes or a Powerpoint from your presentation that you are happy to share? I am sure there are quite a few of us who'd be interested in your views.

Pete

[Larryp]

As usual, Peter-very nice :thumbsup:

[Peter Ward]

Sorry, it was pretty much an "ad lib" presentation (albeit with about 50 Keynote slides (I use a Mac) to jog my memory)..I didn't have notes....and I don't think they'd make much sense without me jabbering away...and waving a weapon of mass-murder, (as one ex-NSW Premier put it) aka laser pointer :)

That said, there was similar interest from the Sydney City Sky-watchers group, with the likely result being a blog from yours truly appearing on a web page soon... :thumbsup:

P.S.
Provided you keep the noise sky limited, doubling exposure time, doubles the signal, but only increases the noise by the square root of 2, ie about 1.4..

P.P.S
Despite use of a reasonably bright laser pointer, no audience members were blinded, fires started or heavy-jets downed... :D