Konihood Square Metal Hood with Cap Based on measurements with a ruler, the inner diameter on the lens side is approximately 45mm. I have included as many photos as possible so you can assess the condition. Please purchase only if you can judge the condition from the images and are satisfied with the current state, and if you understand that this is a used item stored at home. Please refrain from purchasing if you are concerned about minor scratches, marks, or wiping traces. Thank you.