Rodenstock 115mm Grandagon-N: Straightening a Bent Filter Ring
Originally posted on Instagram. Notes from the repair bench, kept here as a searchable archive. View the original on Instagram
This 115mm Rodenstock 115mm Grandagon -N lens took a hard hit. As seen in the photos, the filter ring absorbed the shock and became quite bent. Even in cases like this, I can straighten out the filter threads as long as no attempt is made to bend back the ring with pliers or other metal tools. I use wooden tools and the fixture in the photos to straighten out filter rings.
This lens has a filter ring that can be unscrewed (quite unusual on a large format lens) and this makes final work such as chasing the threads a bit easier.
