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May, 2013:

A few widefields from Joshua Tree

Visited Indian Cove Campground in Joshua Tree National Park last weekend for a little camping trip with some friends and I decided to try out the Tokina 11-16mm for widefield work. I’ve heard good things so I rented it for the weekend.

I was pretty impressed with this lens, pretty dang sharp for an off-brand zoom and the distortion is still visible but not bad at all for how wide it is. I mean, this is close to a fisheye for field of view. Really fun to play with.

Anyway, the images!

Barnard 72, the Snake Nebula

Finally had a decent night! Last months weather was poor but we got a break last weekend. Perfect conditions all night long. This is a pretty tough target, tons of bright stars combined with super faint dust make processing interesting. I think I may revisit this area soon

Image Location and Date: Orange County Astronomers dark site in Anza, CA, May 11th
Object: Coma Cluster
Mount: Orion Atlas EQ-G
Imaging scope: Orion 8″ f3.9 Astrograph
Imaging FL: 800mm
Imaging focal ratio: f3.9
Imaging camera: Canon 1100D (Rebel T3) Modded with CLS-CCD filter
Lights: 47x300sec @ ISO 1600

Calibration: Darks, flats, Bias
Guide scope: Tair-3c with Orion StarShoot Auto Guider
Other details: guiding with PHD, captured with APT, processed in PixInsight + PS