The inset is from the gray-scale surface version of the "normal" range exposure, while the background shot was taken at much higher
speed. Notice the plage trough and areas in the inset that reached saturation (white), versus the well-defined serpentine path the plage
takes in the main image. The overall texture and detail is better at the inset exposure setting however, as the dynamic range is greater,
providing finer increments (more discrete levels) between all black and all white.
With its huge 4008 x 2672 (9 micron) pixel array, the SBIG STL11K produces stunning detail at this scale. The full-res images from
which these were taken are a mind-blowing 55 by 37 inches at web-based 72ppi, with a 4X Powermate yielding a solar disk 36 inches in
diameter with this setup! The above is an unresized section cropped directly from the gray-scale full-disk image.
This is from a single image of a 21-July-2004 session with the 105mm AP Traveler/AP900GTO, Coronado Solarmax90/BF30, SBIG
STL11K CCD, and TeleVue 4x Powermate, taken at 0.022 seconds. The exposures were kept relatively short, so as to prevent "burnout"
and bloating of the plage surrounding AR652 (the prominent grouping just left of center). North is on top and East is to the left.
Still dealing with the Newton's Rings issue, but progress on a work-around solution is being made (check out the Newton's Rings page),
though only minor fringing appeared during this session (seen here as horizontal texturing running above and to the right of AR652). The
image itself was used to create a custom flat, mildly reducing the amount of limb darkening in an effort to enhance detail there.
As is my now my customary approach, a single image was processed in Images Plus via three separate paths, yielding images for the
surface, "hairy" limbs, and prominence portions. They were then composited using PhotoShop CS, which was also used for the final
"polish", size reduction, and web (JPEG) conversions.
Having been aware of exposure limits due to the brilliance of the AR652 complex, I decided it might be neat to explore that hot region via a
substantially faster (darker) exposure. Reducing the time from 0.022 seconds to 0.010 seconds removed the bloating from the plage, as
can be seen below, cropped from full-disk images.