Reflex Lenses and Doughnut Bokeh
Reflex lenses, or more properly catadioptric lenses, have long posed photographers with the possibility of a long telephoto lens at a fraction of the cost of the standard refractive lenses. A 500mm f/8 reflex lens for $200 or less compared to the $10,000 for a 500mm f/4 refractive lens. They’re simpler, manual focus, no iris, […]
Depth of Field and Diffraction: Canon 5D Mark 3 Video Tests
I don’t think it’s a stretch to say that one of the more attractive features that make the full frame VDSLRs attractive is that the large sensor can render shallow depth of field. When compared to a Super 35 frame, you’re looking at almost a stop narrower depth of field for the same aperture. For […]
DIY Autofocus Calibration Target
As much as I swore off AF testing and calibrating, I’m back at it again. This time I’ve decided to forgo the sheet paper targets and build a target similar to the Lens Align. Now obviously, if you don’t want to spend the time building a target, a Lens Align is, to my knowledge, the […]