cascading MTF's then choose film

[the journey]

<p>here's what i'm looking at.<br>

let's say i want to use that killer leica lens 50mm/f0.95<br>

at full open the 40 LP/mm starts at 40% on axis and drops to 20% at the lens edge 21mm.<br>

so 40% at 40LP/mm is valid +- 5mm from center of lens and the vignetting is ~85% at +-5mm<br>

let's say i want to shooting conditions<br>

bright sun, sunset, sunrise l<br>

andscape and urban<br>

no snow, or water<br>

people will be in frame, so skins tones need to be natural<br>

the exposure time is fixed at1/48 th sec<br>

if i want to shoot on Velvia 50, what aperture setting are available?<br>

i would rather shoot wide open and and ND filters than close the aperture.<br>

if i'm going to eventually scan the frames at 4000dpi at 78LP/mm, does 40LP/mm have enough resolution to do justice to the film?<br>

thanks!!</p>

[Robin Smith]

<p>It's like a modern poem -- in structure, as well as because I don't understand it.</p>

[the journey]

lens MTF * convolved * film resolution at 24fps

 

using Velvia 50 shooting sunrise/sunset,

 

holding aperture wide open to compress the DOF

 

eventually scanning negative at 78LP/mm

 

does Velvia have enough resolution at those shooting conditions?