A week or so ago, a reader asked if I could try to find out if there’s any vibration difference between a heavy carbon fiber tripod with the skinny legs extended first, or the fat legs extended first. I was doubtful that there would be any difference, and first tried to find out if there… [Read More]

I think this is my last test on the Coastal Optical 60mm f/4 UV-VIS-IR Apo Macro lens. It’s a simple visual demonstration of light falloff. The camera is a Sony a7 modified for IR by LifePixel, using the Super Color sensor stack filter. I put an Expodisc on the lens and aimed it at a… [Read More]

I mounted the Coastal Optical 60mm f/4 UV-Vis-IR Apo Macro lens (hereafter called the CO 60) to the LifePixel-modified Sony alpha 7. The LifePixel filter absorption curve is “Super Color”. I mounted a RRS L-plate, clipped it in landscape orientation into an Arca Swiss C1 head which was attached to a set of RRS TVC-44 legs…. [Read More]

Yesterday I went for a walk near my house with the LifePixel-modified alpha 7 and the Coastal Optical 60mm f/4 lens. No tripod. As an informal flare test, I shot into the sun:   The above image is a ten-exposure stitch, with the camera held in portrait orientation, and a single row. I consider this… [Read More]