| Author | Message | ||
     Jayd Tinkerer Username: Jayd Post Number: 58 Registered: 06-2007 Rating: N/A |
I have figured it out and exposing the shutter and aperture blades is pretty easy on the 90mm. 1. Remove the lens hood assembly by sliding the hood forward to expose the three 1 mm retaining screws evenly spaced around the barrel, these screws need not be taken all the way out: back them out evenly until the hood assembly slips off. 2. Once the hood assembly is removed you will see three screws holding the shutter speed ring on I set the speed to 500 before removing then realign 500 to the mark when reassembling. 3. With the shutter speed setting ring removed find and loosen the 1 mm set screw on the front lens element set barrel, then un screw it off. Now the front of the blades are exposed. 4. The rear lens elements set simply screw out with the two-leg spanner exposing the aperture and shutter blades. If you would like pictures let me know. I found some small soft white makeup sponges at Walgreen’s brand name Studio 35 that I superglue to a popsicle (AKA craft) stick that worked well to gently wipe the blades with, cutting back the soiled portion as I went. I'll post pictures of this invention. Also available at Walgreen's are excellent tight wound cotton swabs with a wide and pointed end that do not shed like Q-tips. Jay |