Ad Astra Observatory

Hi Jimbo,
The image is a jpeg not NEF (Nikon’s raw format). My recollection is
that there might be a plug-in from the Nikon website that Photoshop
needs. I am using CS2 and I have a vague recollection that prior to
CS it wasn’t handled well at all. I know CS work fairly well but it
feels much easier with CS2. I don’t have much time to look at it
tonight, but I did open it and check out the three peaks. It is

interesting (and not surprising) that there is way more information
in the low end in-spite of what the histogram said.

Thanks for sending the image.

Alex

On Aug 29, 2006, at 5:17 PM, Jimbo S. Harris wrote:

> Hi Alex,

>
> Sorry for the size of the download (the image is ~2.5M). This is a
> 1 minute exposure right out of the D70 (JPEG Fine Large — I
> haven’t figured out the whole “RAW” thing yet). When you take it
> into Photoshop, check out the 3-humped histogram. A 2 minute

> exposure pushes the red way faster than the blue (although it looks
> like both blue and red got a bunch of extra photons…). Even
> something as crude as “Auto Levels” will show you more or less what
> the image is supposed to look like. There’s a bit of vignetting at

> the edges, and the long exposure has created some amp glow in the
> upper left hand corner of the image. This is what the image looks
> like when I cleaned it up: http://www.jimbo.net/astro/
> 20060820_M20_5×2min.jpg
>
> Enjoy,

> Jimbo
> <20060820_0001.jpg>