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Re: [APML] Center of Orion
Well done, Wei-Hao. The blue response of the E100S is much better than
the Supra I used...
http://www.light-to-dark.com/blt_swd_supra.html
...which skews colour to the red/red-violet.
Stephen Pitt
Wei-Hao Wang wrote:
> Hi All,
>
> I processed the central two frames of the Orion mosaic and uploaded to
> my website:
> http://www.ifa.hawaii.edu/~wang/gallery/picutres/orion-center-2004.htm
> I added several old images of M42 to avoid the saturation but I didn't
> apply strong masks. You can see an "enhanced" version for fainter
> nebulas by moving the cursor on the image.
>
> I decide not to further process other frames until I collect more of
> them and upgrade my computer. My computer even have difficulty to
> handle two frames with full resolution in 16bit mode. If you like to
> see what I already have, a preview is here:
> http://www.ifa.hawaii.edu/~wang/misc/orion-mosaic.jpg
>
> One thing interesting I found about this image (the two frame version)
> is that the stars appear much larger, comparing to my other pictures
> taken with Provia 400F or Centuria 400. For example:
> http://www.ifa.hawaii.edu/~wang/gallery/picutres/m16_to_24.htm
> When I zoomed in, I found the faintest stars in both images have similar
> diameters, about 30 um to 40um. But brighter stars by E100S appear
> fatter. I guess this has something to do with the much smaller dynamical
> range of the pushed slide, i.e, stars grow and get saturated much faster.
> Another possible reason is the hilation in the film. If you zoom in the
> E100S image, you see halos around stars. This is not the case on Provia
> 400F or Centuria 400.
>
> Comments are welcome.
> Have a nice weekend.
>
> Wei-Hao
>
> ______________________________________________________________________
> Wei-Hao Wang :)
>
> Institute for Astronomy at University of Hawaii
>
> Address: Phone: 808-956-9867
> 2680 Woodlawn Drive Personal Website:
> Honolulu, HI 96822 http://www.ifa.hawaii.edu/~wang
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