Dear All,

I'm a newbie in diy projector.
I want to build my pj with this plan: http://www.lumenlab.com/protectedwiki/Simple_Projector_Plans
The resulted image size is depend on the distance between triplet and screen. Please correct if i'm wrong. So if I want to change the resulted size, I just customize the distance. Do I need to change the distance between components inside the box to get good focus? Or just change the distance between triplet and screen?

Please explains more about this matter.

Mostly the image size is changed by the box position a small amount of focus is also required, plus/minus 1 inch max.