Image Acquisition Information
Telescope: 16" RCOS Richey Chretien Telescope (ion milled at 6/9)
Camera: SBIG STL-11000
Guiding: SBIG AOL, Astrodon MOAG AOG (SBIG 237
with Custom FLR)
Filters: Astrodon Ha and Astrodon RBG Filters
Mount: Software Bisque Paramount ME
Acquisition Programs: The Sky,CCDAutopliot IV, CCD Soft.
Processing Programs: CCDStack, Maxim DL, Photoshop
Date: Data processed February 8, 2013. Data aquisition: January
2, 2013- January
Time: 12 x20 min ( 4
hours) each for each of Ha, L, R, G, B:
Total of 16 hours imaging time.
Processing: CCD Stack and PhotoShop CS/3
Image Infornmation: Sh2-242 ia an emission nebula in the constelation Taurus, with extremely
low surface brighness.
This LRGB-Ha image was obtained
using AstroDon LRGB and 3nm band pass of Ha filters. This object emits light in Ha with
nearly no SII, NII or OIII content. A separate LRGB and H-alpha image were produced in CCD Stack and
then layered in Photoshop CS4. The H-alpha image was layered three times, in order to bring out the fainter
regions on the nebula. Further data stretching, high pass filtering and background smoothing was performed with Adobe
Photoshop CS/4. All data stretching was by minimal stretching with gamma and DDP in CCD Stack and then further stretching
with curves/levels in photoshop.