After an extensive blogging sabbatical, Profjohn is back on the job and quite excited about all the upcoming astronomy events worldwide. Here is yet another brilliant image from Jim Ferreira using a camera from The Imaging Source:

Good Folks at The Imaging Source

Here's a sunrise image of Copernicus shot with a Stellarvue 4 inch ED refractor at f/21 using a DMK 21AU04. The image is a mosaic of 3 frames, processed in AVI Stack. Seeing was pretty turbulent, with fine surface features dancing about, in and out of focus. Being able to combine some 1500 frames per image produced a very deep image that could tolerate considerable sharpening and histogram stretching. The recursive scan sensor is far less susceptible to image artifacts due to sharpening typical with an inter-line sensor. Shot from my backyard in Livermore CA.

Cheers
Jim Ferreira
bakerst@comcast.net