rmpsrpms ✭✭✭✭✭

Here is an animation I made showing the progression of the BIE from Stage A (EDS) through Stage L (VLDS) (View Post)

In the process of attributing some varieties I found in a recent lot of 1955-S BU Rolls, I realized that the many RPM #4 die stages had some un-connected cross-references. It took a bit of study of a… (View Post)

No problem, can take up to ~4" wide. Not sure the min but it works with an old iphone. (View Post)

I don't have a picture, as I shipped the only one I've made so far, but I do have the drawings I made for the client to explain how they work. (View Post)

The "diopter" lenses used by optometrists are single element lenses, so they give high power but poor color and distortion correction. Most handheld loupes are similar. One step up is an ac… (View Post)