the last word

This is the eighth in a series of posts about building a bokeh simulator. This series starts here. I’m still struggling with how to efficiently program the off-axis bokeh simulation, but I did write some code to do a simulation with a static offset, if that out of focus (OOF) point spread function (PSF) is… [Read More]

This is the seventh in a series of posts about building a bokeh simulator. This series starts here. Yesterday we saw occlusion of the iris diaphragm in the out of focus (OOF) point spread functions (PSFs) of the Zeiss 85 mm f/1.4 Otus and the Zeiss 85 mm f/1.8 Batis lenses. Today, I’ll show you… [Read More]

This is the sixth in a series of posts about building a bokeh simulator. This series starts here. It’s become apparent to me that what many people talk about when they discuss a lens’ out of focus (OOF,  as opposed to almost-focused) bokeh is related to the off -axis occluding of the sensor’s view of the… [Read More]

This is the fifth in a series of posts about building a bokeh simulator. This series starts here. In the last post, I compared simulated defocusing to the real thing with the Sony 135mm STF lens. Now I’m going to do the same thing with teh Zeiss 135mm f/2 Apo=Sonnar ZF.2. Here’s a sharp image with an a7RII… [Read More]

This is the fourth in a series of posts about building a bokeh simulator. This series starts here. I wanted to get an idea of how simulated defocusing compared to the real thing with the Sony 135mm STF lens. I took this sharp image with an a7RII at f/11: Then I set it to the… [Read More]