This image of the Crab Nebula was captured by Adrian Brown in December 2006. It was created from 5 x 30 minute
exposures with a 6 nm H-alpha filter. For imaging Adrian used an ATIK ATK16HR camera through a Skywatcher 80ED Pro refractor at f7.5. This was
guided using an ATIK ATK-2HS camera through a Skywatcher 80T refractor. The set up was mounted on a Celestron CGE mount.
Chris Newsome and Adrian Brown produced the following image of The Crab Nebula on the 19th February 2006. They
used a Canon EOS300 camera at 800 ASA through Adrian's Celestron C11 fitted with a f/6.3 focal reducer. This was set up on a CGE mount and
guided using Guidedog software with focusing using DSLRFocus. An Astronomik CLS filter was also used to remove sodium light. Three
images taken at 210 seconds exposure and calibrated in Maxim DL. The resulting image was processed in CS2 using RGB levels, curves,
GradientXTerminator and a highpass filter.
This image of The Crab Nebula was captured by Adrian Brown using the Rent a Scope Robotic Observatory
in New Mexico on the 30th October 2005. He used a Takahashi Mewlon 300 on a Paramount mount and an SBIG ST8E camera to capture 13x 120
seconds high resolution luminance frames. Lower resolution RGB frames captured were 5x 60 seconds Red, 4x 60 seconds Green and 5x 90 seconds
Blue. To process the image Adrian used Maxim DL 4 to align and stack the composite frames and then Adobe Photoshop to combine the luminance
and RGB images into the final image. Adrian comments that "the seeing conditions in New Mexico weren't as good as the day before when I
imaged Caldwell 23 (NGC 891) so this image is a little on the soft side and not as sharp. Having said that, compared to the UK it was still good observing
conditions. It was fascinating to look at the webcam quality "all sky cam" image for the observatory and see the milky way arcing across the
image. I can only imagine what it must be like to actually be there."
Adrian has also taken a picture of Caldwell 23 (NGC 891) with this robotic telescope facility,
where he provides a review.