Palaeoboy
Joel Matherson
I think some are reading the title and skimming past the actual post LOL. Just to bring things back on track a bit the question isnt should you mix and match or not, its about when you do how well those different lenses blend in together. Have you found lenses from different companies pair up really well character wise? Like Ferider has pointed out that the Voigtlander 28mm is a great match for a DR Summicron. (I would never have thought to try that combo before) Alternatively have you tried one that didnt fit in with your other lenses at all.