Our knowledge of this item is very limited. The shutter speeds are 1/15 1/25 1/40 1/60 1/80 1/100. The hole / aperture is 65mm in diameter on one side and 64mm on the other. Overall dimensions are 12cms x 9.3cms x 2.7cms excluding fittings. The curtain is in tact, minor marks to the wood, unsure if the fittings are complete. Selling AS IS, untested.