11/3/2022 0 Comments Sigma optimization pro![]() ![]() ![]() Conclusionįor the even slightly gear-head amongst us, this is an awesome tool, giving us the ability to fine-tune autofocus adjustment much more completely than simple camera microfocus adjustment. Obviously a zoom lens, which can be adjusted both at different focal lengths for different focusing distances at each focal length, will take longer. Total elapsed time for firmware update, focus checks, focus adjustments, and final check was just about 10 minutes. They all showed focus was accurate, as in the samples below. Spot focusing on the tip of the green leaf, I took several shots each at minimum focusing distance, 3 feet, and 6 feet. I started with a placemat set in front of a picture window. Since I plan on using this lens outdoors in daylight I wanted to adjust it in daylight (autofocus can change slightly in different lighting conditions, if you aren’t aware). So I made do with a placemat and my back yard. Since I was at home instead of the office, I didn’t have Focal, LensAlign charts, or any of the other things that seem to be considered necessary tools for autofocus adjustment these days. Without the Sigma dock and software, the only option was a trip to the factory service center to change the lens parameters. I can do a microfocus adjustment to correct long-distance focus, but then the lens is frontfocusing at near distances. ![]() This copy of the 35mm f/1.4 is perfect on my Canon 6D at close and intermediate distances, but at long distances it backfocuses badly. I chose a lens that is perfect for this software. Unless I can put it off so long that my wife gets frustrated and does it herself. Plus, like I said, I’ve got a deck to stain. I’ll take nearly perfect in 10 minutes rather than perfect in 4 hours every time. I’m too aware that phase detection AF is a shotgun, not a sniper’s rifle. I should be clear, I don’t do a full-ballistic, OCD, 600-shot microfocus adjustment. ![]()
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