06-18-2012, 01:03 PM
Thank you very much for an answer <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/smile.gif' class='bbc_emoticon' alt='' /> And take your time with a review - your primary work cannot sunnfer bcoz of PZ <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/wink.gif' class='bbc_emoticon' alt='' />
The issue with focus shift is that it can't be dealt with manual focus - even if we focus with LV it would still be a problem if we decide to shoot at say f/2.8 (unless we focus with DoF button pressed <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/wink.gif' class='bbc_emoticon' alt='' />) But I do agree it's an issue mostly in a lab, where, with WA lens, you have to be pretty close to a chart to have it fill the frame, thus reducing DoF considerably.
The issue with focus shift is that it can't be dealt with manual focus - even if we focus with LV it would still be a problem if we decide to shoot at say f/2.8 (unless we focus with DoF button pressed <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/wink.gif' class='bbc_emoticon' alt='' />) But I do agree it's an issue mostly in a lab, where, with WA lens, you have to be pretty close to a chart to have it fill the frame, thus reducing DoF considerably.