More image stacking stuff.

I’m working on a skill share powerpoint to share image stacking, how I learned it and how I do it. (For stuff I’ve already posted about this, see this post). This post will include additional references on image stacking, focusing on star trail style stacking and images by other photographers.

Astrophotography: Star Photo Stacking by PKM (instructable)

I used Lincoln Harrison’s tutorials when building my own stacked images. I linked to that tutorial in the first post. His flickr is here and has even more amazing images.
From Petapixel:

Photographer Lincoln Harrison captures jaw-dropping photographs of star trails. Shooting from the Australian outback, he spends up to 15 hours creating each image of the night sky. Shooting with a Nikon D7000, Nikon D3100, and a wide assortment of lenses, Harrison captures a large number of exposures of the foreground and stars separately. He then combines the images (sometimes hundreds of them) into amazing photographs showing the sky dominated by colorful star trails.

Further browsing Petapixel turned up photographer Ben Canales (see Zhang’s Petapixel article on him here) who also does stacks of stars. His website is here and a tutorial video he did about his workflow is here.

Example of Grant Kaye’s star trail photography can be found here.

Using Photoshop Threshold to Separate Colors for Screenprint

A classmate came up to me today and asked how to seperate black and white onto two different images to print them out. We discussed trading white for light grey since the lab doesn’t have white, but I couldn’t figure out how to do what she wanted.

Enter the google machine.

Using Photoshop Threshold to Separate Colors for Screenprint

I won’t be using this for screenprinting any time soon, but it could be useful for other photographic or graphic work in the future.