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Help for angle of view conversion

Started Apr 7, 2018 | Questions thread
JakeJY Veteran Member • Posts: 5,442
Re: Help for angle of view conversion
2

14mm is wider than 15mm if the specs are mostly correct (assuming no drastically fudging of numbers). However, there are caveats:

1) FL are typically obtained focused to infinity. If shooting macro, you tend to focus much closer which can change effective FL drastically.

2) It's possible to buy a lens with a smaller image circle, which will cause vignetting or a dark circle. Once you crop out those parts, the effective FOV can be much smaller. You see this with C-mount CCTV lenses that are sometimes available with bundled MFT adapter or with MFT mount.

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