New blog post is up!

https://skullvalanche.com/blog/ereader-grip/

In which I ramble about designing some 3D printed grip handles for my e-reader.

#3Dprinting #3DPrinter #CAD #personalBlog #blog #Kobo #Kindle #eReader

Does anyone know any Free Software application to design #lenses / optical elements?

I haven't found any and I kind of know how to make one...

#cad #floss #freesoftware #optics #simulation