Re: [APML] New Images Posted

[Michael Cole <mrcole@earthlink.net>]

Excellent work Jon.  That is proving to be a great scope.  In your hands 
anyway.
Mike

Jon Kolb wrote:

>Here's three from the previous new moon period.  All are single
>exposures using the Pentax 67 and TMB 152 at f/7.9 on E200, pushed one
>stop.  While 60 minutes at f/7.9 with a one stop push seems to be about
>optimal when shooting Provia 400F from a dark site, I think I should
>have gone longer with the E200 for the nebulosity shots, perhaps 80 or
>90 minutes with a one stop push.  All the images are cropped slightly to
>remove some vignetting from the FF/camera mount.  As always, comments
>and suggestions are welcome.
>
>This one, I think is the best of the lot.  I was happy that I could get
>some distinction between the stars in the cluster apart from the dense
>cloud in the background.  Registar counts 144,848 stars in this one!
>http://home.datawest.net/jkolb/m7_tmb.htm
>
>This is the best I've done on this subject, and I like the way E200
>recorded the different shades of red in the bright central region of the
>nebula.
>http://home.datawest.net/jkolb/m17_tmb.htm
>
>I'm still tinkering some with this one.  The original slide shows the
>"pillars of creation" area" very distinctly, but when it's brightened up
>to show the fainter nebulosity, everything is all washed out in the
>core.  I tried a mask of the central area, but I haven't been able to
>blend it in very well as of yet.  I'm thinking that a longer exposure,
>stacking, and the mask technique are probably needed here.  As it
>stands, I think the shot looks a little too stretched.
>http://home.datawest.net/jkolb/m16.htm
>
>These images mark the one-year anniversary of shooting the TMB 152, and
>I must say that the scope's resolution, constrast, and tight stars are
>still better than what I can do with the processing part of the job.
>That's a good sign, I think, for a lot of future enjoyment with this
>instrument.
>
>Sincerely,
>Jon Kolb
>Adventures in Astrophotography
>http://home.datawest.net/jkolb/
>jkolb@datawest.net
>
>
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>  
>

-- 
Michael Cole
UrbanImager Astrophotography website
http://home.earthlink.net/~urbanimager/index.htm



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