Hello everyone,

Ive just started my DIY PJ and having some problems.

I bought the Lumen lab standard lens kit. 220mm Fresnel, 317mm Fresnel and Standard Triplet lens 320mm Focal length.

Im building a 15inch Project, how far does the 317mm Fresnel have to be from the triplet lens?

I'm asking this because of the front fresnel used in the guide has FL 330mm.

Thx,

Triast
That depends on the throw that you need. Here is focal calc II. It is a lens calculator.
http://www.lumenlab.com/forums/index.php?a...e=post&id=18515
Save it and run the program. Here is the link to some info. Read all of it and you will understand more.
Build and Calibration Tools

Here is one more link. It is a tips and tricks guide
http://www.lumenlab.com/forums/index.php?showtopic=9870
I think you will find these invaluable to you project!
Good Luck!
ChuckL