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Stanford with a Fisheye Lens

May 22, 2015

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Pentax 67 with fisheye lens, TriX at 1000

Fisheye Pentax 67 TriX

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Losmandy G11 Gears and Stiction

I've been peeling onions in the backyard these past nights. Based on some questions from Marek and Carl, they were experiencing strange DEC behavior when guiding near Sadr during August. I felt that much of the problem was due to tracking through the Zenith where scope balance is most ineffective at keeping DEC meshed. Since I'd moved onto the problem after handling some of the earlier questions about Gemini systems and getting the camera cooling nailed down, my current target is the same region as the problem area. I quickly saw similar DEC jumping as bad as what Marek was experiencing.

NGC 281 HaRGB

NGC 281 HaRGB , a photo by S Migol on Flickr. Via Flickr: NGC 281 HaRGB in Menlo Park, CA Sept 2013

Calibration tips for the Pentax K10D

Interesting things that I've learned over the years for calibrating astro-images with my Pentax K10D camera. The Pentax K10D camera is an older design, released back in 2006 when Pentax was an independent company. Since then, it has passed through the hands of Hoya and now is a part of Hitachi. I'm not sure of what will happen with the Pentax name, but for now, it remains an independent brand. As some context for why I'm using Pentax for my astrophotos, the short answer is "use what you have." The long answer is that I already had an investment in old glass and wanted to continue to use it.

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Stanford with a Fisheye Lens

Pentax 67 with fisheye lens, TriX at 1000

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