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Mixed-up about minimum apertures? Frustrated by fisheye lenses? Send your technique and camera questions to digitalcamera@futurenet.com
Matthew Richards
Matthew Richards is a photographer and journalist who has spent years using all manner of photo gear.
Testing a Sigma 105mm macro lens on a Nikon camera, the narrowest aperture shrank from f/22 to f/32 at a focus distance of 0.5m and to f/36 at 0.4m.
Macro magnification, shrinking apertures
Q Your review of the new Tamron 90mm macro lens for Nikon and Sony cameras states that the minimum aperture is f/16, but the lab graph goes to f/22. Which is it?