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Ok guys.
I recently realized that my focusing ring on my DA* 50-135mm started feeling loose again and that was why I exchanged my first version. So as a normal, curious teen, I surreptitiously took some of my dad's little screwdrivers during the night (he doesn't like my touching my babies incase I break em after seeing the 50mm f/2 open on my table)
Anyways, I was desperate to see how I could tighten my focusing ring. After an hour, I was frustrated and decided to turn the focussing ring past infinity and past 1m (minimum focusing). Then i realized the lens no longer had any hysteresis.
And FYI, yes I do know that putting the camera on AF and lens on AF will naturally cause some hysteresis but there SHOULD be none during manual focusing.
Can anyone test this with their SDM lenses and see if they can get their ring more loose or tight (I think if you twist it the other polar end then it will do the opposite effect). I am curious as to how this QuickShift focus system works. If you have other Nikon/Canon glass, does it have the same effect or is it just for Pentax quickshift?
Thanks. Just an observation that I thought was strange. There is still some hysteresis on my lens still but this is much less than a 10th of a degrees worth since the only way I can tell is when I twist the focusing ring in the opposite direction, I can feel an opposing force within the lens.