Just for fun. The Grubb Patent Doublet dates from about 1857-60 and is considered by some to be akin to a RR lens. Surprisingly good with a home made plastic Waterhouse Stop and roughly fixed onto a Sony A7II. eventually it will be sorted out and fitted to an LF camera but for the moment this will have to do. Its base problem is flare not helped by 150+ years of muck which is taking time to clean off, and some yellowing of the balsam.