David storm over on the other forum noticed that my macro shots were looking odd compared to what they should considering I said they were shot at f32.
He had the sigma 105 and ext tubes before and knew that the tubes hold the lens wide open regardless of it being set to f32.
Question is can they be modified to allow A setting which eliminates the problem or do I need new tubes.
Mine are a set of vivatar auto, (???)
Any thoughts or anyone with tubes with contacts for sale ?