Re: Modulation Transfer Factor

2007-01-15 Thread Bob Shell
I suspect the difference would be small. Bob On Jan 14, 2007, at 1:06 PM, John Celio wrote: Will setting P to MTF mode produce sharper images, on average, than normal Program mode? As my old friend Fred Picker used to always say when asked questions like this, TRY IT. That's the only

Re: Modulation Transfer Factor

2007-01-14 Thread Bob Shell
On Jan 13, 2007, at 8:58 PM, John Celio wrote: Okay, I think I may have understood about 15-25% of that. My question, to make it as simple as possible: Will setting P to MTF mode produce sharper images, on average, than normal Program mode? As my old friend Fred Picker used to

Re: Modulation Transfer Factor

2007-01-14 Thread John Celio
Will setting P to MTF mode produce sharper images, on average, than normal Program mode? As my old friend Fred Picker used to always say when asked questions like this, TRY IT. That's the only way you will know if it produces sharper images **for you**, which is what matters. Well, I've

Re: Modulation Transfer Factor

2007-01-14 Thread John Celio
Will setting P to MTF mode produce sharper images, on average, than normal Program mode? As my old friend Fred Picker used to always say when asked questions like this, TRY IT. That's the only way you will know if it produces sharper images **for you**, which is what matters.

Modulation Transfer Factor

2007-01-13 Thread Bertil Holmberg
Looks like the K10D brought back something very Pentax - the MTF - or Modulation Transfer Factor. The excellent DCWatch Longterm Test #5 covers this in detail with many example images taken with the DA 40, FA 43, and DA 16-45 mm lenses. http://dc.watch.impress.co.jp/cda/longterm/2007/01/12

Re: Modulation Transfer Factor

2007-01-13 Thread John Francis
On Sat, Jan 13, 2007 at 09:58:34PM +0100, Bertil Holmberg wrote: Looks like the K10D brought back something very Pentax - the MTF - or Modulation Transfer Factor. The excellent DCWatch Longterm Test #5 covers this in detail with many example images taken with the DA 40, FA 43, and DA 16

Re: Modulation Transfer Factor

2007-01-13 Thread Bob Shell
On Jan 13, 2007, at 4:37 PM, John Francis wrote: The MTF is a measure of the resolving power (or sharpness) of the lens, and is dependent on aperture. Not really. MTF stands for Modulation Transfer Function. This is an expression of how accurately a lens transmits modulation, which is

Re: Modulation Transfer Factor

2007-01-13 Thread John Celio
The MTF is a measure of the resolving power (or sharpness) of the lens, and is dependent on aperture. Not really. MTF stands for Modulation Transfer Function. This is an expression of how accurately a lens transmits modulation, which is not resolving power at all. Okay, I think I may

Re: Modulation Transfer Factor

2007-01-13 Thread Godfrey DiGiorgi
On Jan 13, 2007, at 5:58 PM, John Celio wrote: The MTF is a measure of the resolving power (or sharpness) of the lens, and is dependent on aperture. Not really. MTF stands for Modulation Transfer Function. This is an expression of how accurately a lens transmits modulation, which is not