Archived posting to the Leica Users Group, 1999/07/08
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Robert Rose writes: > Also, there is a really nice portable version for the Palm at: > www.users.bigpond.com/bitwareoz > called Focus+ Oh thanks *very* much for posting that, it took about 10 seconds to decide to register it, much easier than my clunky spreadsheet. > These programs confirm that Jim is correct. The reason the Summilux > has "less" DOF than the Noctilux at the same subject distance is > because it has a smaller field of view. They will give identical DOF > at equivalent f/stops only if you move in with the Noctilux to frame > the identical image. I don't think anyone was claiming anything different, were they? What I said was "Perhaps it's worth pointing out that - for the same subject distance - the 75mm used at f1.4 has a significantly *shallower* DoF than the 50mm used at f1." Notice that I specifically said the *SAME* subject distance. I then said "If you come closer with the 50mm to frame tighter - say to 2/3 distance - then the situation reverses" (I was referring to the 50mm used at f1 and the 75mm used at 1.4). So there's never been any disagreement. David Morton dmorton@journalist.co.uk