VERY easy solution here: First, modify your 'alter ego' and get a set of miniature screwdrivers. Now, listen:
First, you need to unscrew the logo ring on the front of the lens. I usually pad each 180 degree side with several small layers of duct tape, then gently hold each arm of a scissors on each side and turn the scissors (counter clockwise). That usually starts the logo ring turning. When loose, you might even be able to unscrew it completely with your fingers. Of course, what I said assumed that the filter ring is not bent (Ouch! That would involve using pliers to straighten that filter ring and that is not too pleasant to do it correctly.) Also, make certain that the threads are CLEAN first, or you will be grinding dirt and causing much friction. I assume that that logo ring is now off the lens.
Then, unscrew the three screws holding that filter ring. Be careful not to lose anything in your exitement, alter-ego, or you will have to change your ego to one of angst.
Now, the fun part: you have three MORE screws to loosen: those holding the helical to the focusing ring. Simply LOOSEN (not remove) them and you can adjust infinity focus easily. Be at a convenient 'infinity' venue where you can check this out (i use my window which faces skyscrapers about 1/4 mile away), and when you are convinced that you are at (or, better, very slighly BEYOND, infinity), lock those three helical screws again and put back the filter ring and logo ring. And then you are done with the fun.
If you were in Philadelphia I would do this in five minutes for you. If you cannot follow this call me at
215.569.4949. - David Lyga