Top Produnkt for the price, I use the diaphragm as a protection for our camera. The annoying closing flap, the most rumbaumelt somewhere or not there where one can thus forget she needs just. By the way, we offer 3 aperture has the advantage that (clear, gray and violet) can photograph certain objects or events even better because of the different tints, for example sunsets. The thread for screwing are accurately processed and fit 100%. For those who still want to continue to use their flap that is ... not a problem, in theory you can screw every 3 aperture in succession and then outside the cap clipping. Am completely satisfied with deiesm product / products.
