Normal. Both of mine do this, and others I`ve handled also do it. Maybe it`s a two speed focusing mechanism? Steve Larson Redondo Beach, California ----- Original Message ----- From: "Fred" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, June 11, 2002 9:18 AM Subject: Vivitar Series 1 28/1.9 Lens Focusing
> I just picked up a K-mount Vivitar Series 1 28/1.9 lens. It seems > to be in very nice condition, nicely finished in look and feel (a > typical early Series 1 lens, I would say), except for one possible > thing that concerns me: > > When focusing from infinity down to it closest focus distance point > of about 0.28 meters, there is a slight change in focus feel that > occurs at about 0.41 meters. From about 0.41 meters to infinity, > the focus seems just a little bit stiffer, while from 0.41 meters to > 0.28 meters, the focus seems just a little easier. > > The transition at 0.41 meters seems abrupt (even if subtle), > although it does not feel rough or anything that suggests trouble, > per se. It's just that I have never had a lens that exhibited an > obvious (if subtle) change in focus feel at one focus distance > before. Perhaps it's just that the focus mechanism "changes modes" > at 0.41 meters, or that a floating element comes into play, or > something (???). (Neither my K 28/2 or A 28/2 exhibit any such > change in feel while focusing.) > > Does anyone else out there have one of these critters to > confirm that this effect is "normal"? Thanks. > > Fred - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
