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Johnnyh
Tinkerer
Username: Johnnyh

Post Number: 17
Registered: 06-2009

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Votes: 0

Posted on Saturday, October 20, 2012 - 03:29 am:   

If you look at the depth-of-field scale, in about the '4-o'clock' position you will find a small slot. This gives access to 3 grub screws in the focus ring as you turn it to place the 8, 4, Infinity positions successively by this slot. You may have to juggle the amount that you loosen these screws, so that on the one hand they clear the edges of the access slot, and on the other hand they clear the focus limit stop which is inside. To complicate matters, the focus ring is also on a thread inside the mounted housing with the depth-of-field scale.

Why on earth, I wonder, would AGI have devised such a fiddly, over-engineered design :-( ? Perhaps it's related to AGI's military contracts background. Such a system would discourage casual tampering, also it might be thought to be more dust-proof (Think sandy desert environments?) Who knows ...

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