Questions tagged “lens features”

Ask the Unique Photo creator community — gear, technique, post-processing and more.

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What is the small metal pin on the focus ring of some Canon FD lenses for?

lens-featuresvintage-camerascanon-fdflashfd-lenses

Photography Stack Exchange contributor

12y ago

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234

How can I identify lenses with full-time manual focus override?

sigmaautofocuslens-featureslensesmanual-focus

Photography Stack Exchange contributor

15y ago

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297

What does USM mean on Canon lenses, and what are the pros and cons?

autofocuscanonlens-featureslensesusm

Photography Stack Exchange contributor

15y ago