I just received a used Tamron SP 500mm Mirror Lens 55BB. I noticed from reading some reviews that the reviewer often said to keep the "normal lens filers" on the front and rear.
There are no filters with this lens. Does anyone that uses or used this lens think these "normal lens filters" are important to the performance of this lens or are they just referring to something like a UV or ND filter?
There are no filters with this lens. Does anyone that uses or used this lens think these "normal lens filters" are important to the performance of this lens or are they just referring to something like a UV or ND filter?