Mamiya 55mm f/4.5 TLR Lens: Removing Filter Thread Dents
Originally posted on Instagram. Notes from the repair bench, kept here as a searchable archive. View the original on Instagram
Removing dents from the taking and viewing lenses on a Mamiya 55mm f/4.5 lens for TLR. Fortunately, the owner of this lens was wise and did not take a pliers to the threads! If a metal tool is used to straighten out dented threads, you can be sure that there will be irreparable damage (at least without lots of heroics).
Photo two shows the form that I use with different size curves for lenses from 40.5mm to 77mm. I use the same method for taking out dents as how they originally were put in the filter ring - by banging them out.
Photo three shows the completed service with rings ready to accept 46mm filters. The dropping tools next to the lens are shop made for different size filter rings.
