Same 67mm with the original Canon EW-73B Lens Hood for lens diameter. The diaphragm is fit, is easy to put the bayonet on the lens. The diaphragm can be inserted for a better transport reversed on lens. The inside is not like the original Canon-lined with fabric against reflections, but consists of a frosted plastic, which is certainly more than adequate for an amateur photographer. Other replicas are expensive and not so good.
I can recommend the aperture and would buy again at any time. 5 stars also for the unbeatable low price!
