On 27 Apr 2005 at 14:48, mike wilson wrote: > In addition, I suspect the curve of the plane of focus in the non-FF lens will > be the "wrong way". In other words, if focussed correctly in the centre, the > curve of plane of focus will move back towards the lens towards the edges of > the > frame. In most macro pictures, one would want the plane of focus to move away > from the lens as it moves towards the sides. I think...
Yes, if I'm interpreting what you wrote, consider the plane-of-focus on the subject side to appear like a section of a sphere (that's an oxymoron if I've ever written one :-) with its centre behind the camera. So effectively the DOF will appear more shallow at similar apertures when using a non-flat field corrected lens, you can see this effect in my sample images (just posted). Cheers, 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
