On 19 Jul 2004 at 7:39, Tom Reese wrote: > Antonio wrote: > > "Shorter lenses have greater DOF and because you are using shorter > lenses to get the same AOV as with 35mm you are therefore getting more > DOF." > > It doesn't work that way. If you shoot a full length portrait with a 135mm > lens at f/8 and then you move much closer to the subject with a 50mm lens at f/8 > to get the exact same image size, the depth of field will be identical. What > will change will be the angle of view. You will see much more background behind > the subject with the 50mm than you will with the 135mm.
The reality is that it practically it makes no difference. IOW stopping down one more stop will provide more effective DOF than moving from 35mm to a 1.5x crop sensor at the same magnification. What you have to remember is that DOF is just a photographers guide, it's not a law. Rob Studdert HURSTVILLE AUSTRALIA Tel +61-2-9554-4110 UTC(GMT) +10 Hours [EMAIL PROTECTED] http://members.ozemail.com.au/~distudio/publications/ Pentax user since 1986, PDMLer since 1998
