Feb 29, 2016 - 9:55pm EST Celestron C8 – ƒ/10 Sony NEX-F3 (lensless) ISO 1600 Exp: 30 seconds
Taken from the roof of Tumblr HQ, in New York City. This is my very first photo taken through my telescope using the star-tracking worm drive.
This is really exciting. I’ve been learning techniques for teasing out the details of my original RAW image, and it’s coming along so nicely.
The first image is the original, unedited image. The long exposure at ISO 1600 removed most of the noise from the image quite well. But the light pollution from the center of Manhattan washes out the image, badly.
The second image is my attempt to mask out most of the light pollution. I did this by duplicating the layer, and performing a gaussian blur across it. I cranked up the blur very high, to get the most even tone possible. Then I selected a color in the star field to the left of the nebula and created a new layer of just that color. I then subtracted that layer from the original. (I deleted the intermediate layer with the gaussian blur).
In the final image, I started over with the Camera RAW image file. Instead of using the gaussian blur technique, I used a variety of other techniques to improve the image. I learned these techniques from a Lynda.com class called Enhancing Night and Low-Light Photos with Photoshop.