Phase Detection Sensor Lines
Mirrorless cameras in particular often have a common issue after an infrared or full-spectrum conversion because of the direct sensor based phase detect focus system. This manifests as horizontal lines across the entire frame. They’re not always visible, though they tend to appear in flat or neutral areas in the frame such as the sky in a landscape shot. We can test for this by shooting against a flat backdrop, crop in, and boost contrast to see what shows up.
Here on the left we have the full size flat shot, and on the right is the crop in with ol’ Ctrl+Shift+L in Photoshop. In both shots the noise patterning looking evenly random with no evidence of phase detect lines in either shot. So far, so good!
Internal Shutter Monitoring IR LED
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