RE: [Utah-astronomy] Vdb142 in Ha - The Elephants Trunk
Chuck said: < OK Tyler, so perhaps 12 twenty-minute exposures in one night would be a bit taxing- but it wouldn't take a man of steel. (Trust me, I've done it, and I'm hardly able to leap tall buildings in a single bound...of course, I was much younger then.) > A bit taxing!!!! You are a more dedicated soul than me! :) I prefer CCD and autoguiding, thank you. Cheers, Tyler
Aloha Tyler How did you determine that a stacked group of 20 minute exposures was the best for this image?? Is this something you know by experience w/ your system or interpolated from a reference set of exposure guides?? Or is this a value imposed by the G11 on autoguide?? Very fine image by the way!! Mahalo and aloha Rob
When I was shooting astrophotos semi-regularly, there was no such thing as CCD's and autoguiders- I didn't have a choice. Everyone guided by eye and hand, and shot emulsion-based photograpy. It only seems monumental when one has the less-strenuous digital option available. BTW, when the very first imaging CCD's were used for astronomy, the hardware consisted of a single-line of sensors, not a grid. The image drifted across the line, which was really a type of scan. And sensitivity was terrible. Only bright objects could be imaged, and the resulting image looked more like a cartoon or painting than a photo. Images contained very little data compared to today's. Amateurs living today are extremely fortunate to have such capabilities available to anyone who is willing to spend the money on the equipment. It was not always so- well within living memory. --- Tyler Allred <tylerallred@earthlink.net> wrote:
A bit taxing!!!! You are a more dedicated soul than me! :) I prefer CCD and autoguiding, thank you.
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participants (3)
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Chuck Hards -
Rob Ratkowski Photography -
Tyler Allred