Hi all, I have run into a situation I dont understand concerning my new Nikon 7900 camera. I am hoping someone can explain what is happening and how to correct it. The problem sometimes occurs while I am trying to do flower or bug macros. Sometimes I can not bring the image into focus. As the lens adjusts (using auto focus) I see the image come into focus in the preview screen (not the view finder) but then it goes past focus before it stops. I have moved closer and further from the subject in small increments to no avail. I have used the zoom while in macro mode and it also goes past focus before stopping. I have changed the lighting of the subject and still no luck. I have made some attempts to try different focus modes but I didnt seem to get any better results. I take a number of macros and usually do not have this problem but as best I can tell, it occurs when the object is 1/8 of an inch or smaller across. I thought maybe this size was just too small but I am puzzled as to why I can see it come into focus but cant get it to lock on even though I hold the shutter release at halfway as instructed by manual. This indicates to me that the size isnt the issue, but something else. Any suggestions? Thanks for any and all responses, Lee