Mark,
Thanks for this. This makes sense, for all that it is only a couple of
lines. I'll do some of my own comparisons between MTF charts and examples.
Leon
http://www.bluering.org.au
http://www.bluering.org.au/leon
Mark Roberts wrote:
Leon Altoff wrote:
Hi all,
I'd like to try and find some information on the bokeh of lenses before
I go out and buy one.
Mike Johnston wrote a good article on lens contrast that explains
bokeh a bit. He says that "The relative superimposition of the
sagittal and tangential lines of an MTF chart are one predictor of
'good' or smooth bokeh." (If you read the rest of the article that'll
make a bit more sense!)
http://luminous-landscape.com/tutorials/understanding-series/lens-contrast.shtml
Some lens manufacturers have tried to pass off the notion that more
closely circular aperture diaphragms with more blades and/or curved
blades are they key to good bokeh. That's marketing BS: Aperture shape
can affect specular highlights, but doesn't do much for bokeh.
