Archives for 2018

This is a continuation of a series of posts about adapter pitfalls and pleasures (I promise that I’ll get to the pleasures). The first four posts are here, here,  here, and here. In the last post we saw that, in spite of my intuition, at identical magnifications, that adapter tilt affected defocus blur more with short lenses than… [Read More]

This is a continuation of a series of posts about adapter pitfalls and pleasures (I promise that I’ll get to the pleasures). The first two posts are here and here. A third is here. The assumption about adapter errors seems to be that they add to the other tilt errors in the camera/lens system. Since… [Read More]

This is a continuation of a series of posts about adapter pitfalls and pleasures (I promise that I’ll get to the pleasures). The first two posts are here and here. It has been stated by many that adapter tilt affects focus blur more for short lenses than long ones. It’s become conventional wisdom, but it… [Read More]

Preface – feel free to ignore this In 1973, I left hp to join a small computer manufacturer called Rolm with the objective of designing a set of products that would get them into the telephone business. I designed a type of telephone switching system known as a PBX. I hired the engineering team, created… [Read More]