Gianfranco Irlanda wrote: > Tamron performs really well for a non SMC lens, but shows a > strange kind of reflections, as it sometimes duplicates small, > strong lights on the scene (and it is not predictable in the > finder, so I guess it is a problem of reflections of light > hitting the sensor and then duplicating on the rear element of > the lens - there is an example in the portrait of Stan at > http://www.photo.net/photodb/photo?photo_id=2784631 - look at > the shirt).
Reflections of bright lighs showing central symmetry are usually caused by the flat filter in front of the lens. You encounter such problems very often when doing nighttime photography. That was the reason for developing ghostless filters, which are curved. Dario
