How do you do the Orton Double Exposure technique with a digital camera?

Question

Is there a specific photshop that you have to use?

Answer 1

Learned something new there, thanks for the tip!
Digitally, you'd treat it the same as any other double exposure: take your 2 shots and in photoshop use one as the background and the other as a layer with 50% transparency.
---
"... the “Orton Technique”. This method consists of taking two pictures of the exact same subject, identically framed, one in focus and one out of focus. When they are sandwiched together, you get surreal artistic images that seems to have a magical glow."
http://www.tonydegroot.com/Tips02.htm