| Author | Message | ||
     Glenn Middleton Rating: N/A |
The foam is there to dampen the shutter vibrations. Mirror slap/shutter vibrations are a much bigger problem on microscopes than with normal photographic lenses/tripod combinations. All to do with magnification factors. If item is not to be used in anger,then you could use either type of foam. You will have to measure the gap/gaps and build up the required thickness. The physics of vibration dampers is not simple and you can make the problem worse, if you take the wrong approach. However in this application I would use Jon's dense foam - it should hold the shutter unit firmly in place without having to be compressed. I think the open cell foam will have to be compressed initially to hold the shutter unit in place. In this state there might not be enough resilience to cut out the vibrations, on a working unit. |