I am always checking out barrel lens to see if they will fit a particular shutter. I just discovered that my Wollensak 9" (229mm) f5.6 raptar copy barrel lens are threaded such that they will fit a large alphax shutter I have which came with Wollensak 11 7/8" (302mm) f4.5 lens. The overall length of the 9" raptar copy lens in its barrel is 69.48mm and the overall length of these cells in the alphax shutter is 70.27mm. This appears to be a minimal difference (.79mm), but should the quality of the photographs from the cells in the barrel be equivalent to pics with these cells when using them in the more convenient alphax shutter? Now I realize this will best be checked on my V8 deardorff, but I want the local gurus to provide me with your techinal expertise and opinions. I thank you for your interest and comments.