RE: [APML] Leonids Composite

[Matt BenDaniel <matt@starmatt.com>]

Chris,

I've found that this batch of exposures has a lot of dust (despite brushing and dust gun). I found I could ignore the dust completely (yay), because I was only masking in the meteor from each exposure.

Matt

At 12:01 AM 11/21/2002 -0700, Chris Schur wrote:
>Matt, while Im up tonight waiting for the aurora to arrive, I might mention
>there is another way to combine images that is not so pasted together. Not
>to say you didnt do a dandy job here, your composite is quite cool.  The
>method Ive used is to adjust each image equally, and convert to a negative.
>then combine by multiply in photoshop on all the layers.  You get a dense
>stack, but then you invert and adjust the brightness to normal.  Sometimes
>with too many images you end up blowing away the bright stuff this way, but
>its worked for me in the past.  You might try it with say three images and
>see if you like it!
>
>Chris Schur
>
>-----Original Message-----
>From: owner-astro-photo@seds.org [mailto:owner-astro-photo@seds.org]On
>Behalf Of Matt BenDaniel
>Sent: Wednesday, November 20, 2002 10:33 PM
>To: astro-photo@seds.org
>Subject: RE: [APML] Leonids Composite
>
>
>At 10:13 PM 11/20/2002 -0700, Chris Schur wrote:
>>Matt, interesting composite.  I suspect you could turn up the white point a
>>bit, its very slightly dim on my monitor.
>
>Thanks, good idea. I upped it some and replaced the image on the web.
>
>>The greens are what you are
>>supposed to get with the Leonids.  Has to do with the interaction with the
>>upper atmosphere.  How did you combine the images, using screen in
>>photoshop?
>
>I used normal layer combine and drew a mask over each meteor to select only
>that content from each composite image.
>
>The background was made from five of the better images combined in RegiStar
>using median (to get rid of dust).
>
>
>>Chris
>>
>>-----Original Message-----
>>From: owner-astro-photo@seds.org [mailto:owner-astro-photo@seds.org]On
>>Behalf Of Matt BenDaniel
>>Sent: Wednesday, November 20, 2002 9:22 PM
>>To: astro-photo@seds.org
>>Subject: [APML] Leonids Composite
>>
>>
>>I've never done a composite like this one before. I scanned over 100 frames
>>and selected 22 of them.
>>
>>One mistake I made was failing to do the following: During a lull in the
>>shower, I should've stopped down my lens and done a long shot to produce
>the
>>background. Then I would have avoided the star aberrations here. I suppose
>I
>>could go out some night soon and do that.
>>
>>I used Fuji Press 400 film. I suspect it may not have been the best choice.
>>Seems like red response is a bit down.
>>
>>http://starmatt.com/gallery/astro/leonids02.html
>>
>>I was not impressed with the shower. It was nothing like last year's. We
>>also had clouds and mediocre transparency. Not to mention the full moon.
>>
>>Comments welcome.
>>--
>>Matt BenDaniel
>>matt@starmatt.com
>>http://starmatt.com


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