Hi, The terminology "equivalent focal length" creates the main confusion. This is of course more confusing with the non-SLR digital cameras where the imaging chips are TINY, and the crop factor is much more than 1,5 or 1,6. A lens with 20 mm focal length maybe quoted as to be "equivalent" to 100 mm. But this equivalency is only right in terms of field-of-view (FOW). Because of this, you get a depth of field of a 20 mm lens but the field-of-view of a 100 mm one. Regards, Izzet > -----Original Message----- > From: owner-photoforum@xxxxxxxxxxxxxxxxxxxxxx > [mailto:owner-photoforum@xxxxxxxxxxxxxxxxxxxxxx] On Behalf Of > wildimages@xxxxxxxxxxx > Sent: Tuesday, November 30, 2004 11:24 AM > To: List for Photo/Imaging Educators - Professionals - Students > Subject: Re: image quality - film vs. digital > > >The biggest problem I have encountered is that most digital sensors > >have greater depth of field at similar aperatures to film cameras. >
