Archived posting to the Leica Users Group, 2002/07/18
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]after all that, aren't you going to post examples ?!? perhaps you are talking about the "nauselux" syndrome, where you are focusing at 6 ft, and objects about 12 ft and in the center 3/4" of the frame take on a swirling, motion-filled appearance. i personally find the phenomenon fascinating, but others on this list are less enthusiastic. - -rei > From: Ted Grant <tedgrant@shaw.ca> > > "When f 1.0 is too much out of focus!" > > Hi Gang, > An interesting observation when using the Noctilus at f 1.0 creating a "too > much out of focus look" that actually becomes a distraction compared to the > same situation at f 2.0! Same lens but stopped down to f 2.0. > > As many of you are aware I'm Bigtime into using M7 and the Noctilux on my > new medical project, women in medicine. Today when editing negatives shot at > f 1.0 during an eye examination at an Ophthalmologist's office I found > something I'd not experienced before. > > A couple of shots were very interesting, but the depth of field at f 1.0 > created a weird look, a visual distortion of out of focus that was > distracting, compared to a few frames of the same scene but shot at f2.0 . > Where there was just enough sharpness, read "less out of focus" to carry the > background to an acceptable sharpness of recognition content. > > It's something I've not encountered in my many years of using a Noctilux and > I'm sure it's merely the clothing and angle of focus that added to this > strange out of focus look. I just thought you might find it interesting that > sometimes weird visual phenomena can occur when using some lenses under > certain angles and wide open apertures. > > ted - -- Rei Shinozuka shino@panix.com Ridgewood, New Jersey - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html