Re: Re: Interesting article from pf

2016-05-04 Thread Collin B
And a misuse of the term "circle of confusion". It is, to be certain, an archaic use of the term confusion and today we might better say convergence. They use it to describe the out-of-focus area when it's actually the in-focus area, the point where the light from the lens converges. -- PDML P

Re: Interesting article from pf

2016-05-04 Thread Toine
Or http://www.reynardcorp.com/products/optical-components/variable-filters/bullseye-radial-apodizing-filters/160-bullseye-apodizing-nd-filters-clear-center.html On 4 May 2016 at 13:37, Toine wrote: > from http://vapour-trail.blogspot.nl/2010_05_01_archive.html > > "Existing imitation techniques

Re: Interesting article from pf

2016-05-04 Thread Toine
from http://vapour-trail.blogspot.nl/2010_05_01_archive.html "Existing imitation techniques On Minolta Dynax 7 film cameras, the STF’s smooth bokeh can be mimicked by taking seven exposures on one frame, each exposure with a smaller aperture size. This results in circle of confusions with bright

Re: Interesting article from pf

2016-05-04 Thread Larry Colen
Toine wrote: "STF lenses include an apodization element in their optical formulas which creates the STF effect." Apodization?? That's new for me. This page explains it: http://www.4photos.de/camera-diy/Apodization-Filter.html Replacing the aperture with a gradiant aperture. Another DIY projec

Re: Interesting article from pf

2016-05-04 Thread Toine
"STF lenses include an apodization element in their optical formulas which creates the STF effect." Apodization?? That's new for me. This page explains it: http://www.4photos.de/camera-diy/Apodization-Filter.html Replacing the aperture with a gradiant aperture. Another DIY project on my bucket li

Interesting article from pf

2016-05-03 Thread Larry Colen
Jostein should check this out http://www.pentaxforums.com/articles/photo-articles/smooth-trans-focus-sony-135mm-f28-guide.html?src=eml -- Sent from my Android phone with K-9 Mail. Please excuse any swypos. http://red4est.com/lrc -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mail