Re: [APML] New M101

["John Boudreau" <jeboud@attbi.com>]

Hi Steve,

Looks to me like it's way underexposed. M101 has fairly low surface brightness, and with 400F unpushed @f/11, 2.5 to 3 hours wouldn't have been excessive if the sky could handle it. I've only got away with 90min exposures on brighter targets at times with unpushed 400F @f/11 because light pollution "helped" somewhat by fogging the film. And at that, I could only record the brighter inner regions of the galaxies very well ;o(

I'm guessing that the banding is caused by your scanner having a problem with the slide being too dark. Looks like you may have also bumped the curves up a bit much for the galaxy's core region.
The tracking looks good, especially considering the conditions. Hard to say about the focus, but I think it's OK too. Perhaps the stars are blown out a bit by aggressive curves?

Well... You did say good or bad <g>.

John Boudreau
http://home.attbi.com/~jeboud/astro.htm

----- Original Message ----- 
From: "Steve Lindsey" <stevelindsey@earthlink.net>
To: "APML" <astro-photo@seds.org>
Cc: "Dan Trimble" <dtrim@earthlink.net>
Sent: Wednesday, March 19, 2003 2:17 AM
Subject: [APML] New M101


> Here's my latest from the last new moon.  Again much better than the very
> poor shot I had posted before but still have a ways to go.  I suffered from
> lots of wind gust which even blew a wind break down that I had set up half
> way through the second shot so I'm pleasantly surprised the guiding wasn't
> worse.
> 
> http://home.earthlink.net/%7estevelindsey/M101.html
> 
> Struggled with the color balance.  Still not as much detail as I'd like and
> the stars are larger than I expected (I didn't push the Provia this time).
> Maybe my focus is a bit off (though I double checked it) or should I expect
> that from the Provia?  I might try some of the Supra I got with the mad rush
> ordering next time out.
> 
> Please let me know what you think good and bad.  Thanks.
> 
> Steve Lindsey
> 
> 
> 
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