Increasing Flash/Strobe Output without Increasing Power

Started 4 months ago | Discussions thread
BAK Forum Pro • Posts: 24,774
Re: Increasing Flash/Strobe Output without Increasing Power

RE >> These numbers certainly don't apply to lens aperture settings, <<

WRONG.

The range of what we call "full stops" is f1, which is very rare, f1.4, f2, which are fast lenses most often for 35mm format camera, then f2.8, which is a fast medium format aperture. After that, common on most cameras of various size up to 6 x 7 and 6 x 9 format, is f4.

Most cameras of all film or sensor sizes (except really small) have apertures of f5.6, f8, f11, and f16.

Some cameras stop at f16.

Others continue to f22.

After f22, the only cameras with smaller apertures are some medium format and most large format.

Medium format is generally 6 cm wide, in one direction, and 4.5 cm,  6cm, 7 cm 8 cm, 9 cm and 17 cm wide in the other direction.

Next you get to 4 x 5 film, which comes in sheets. Small apertures for 4 x 5 cameras are often f32  and f45. Sometimes 4 x 5 film cameras, 5 x7 film cameras, and 8 x 10 film cameras have f64.

If you look up f64 you'll find it is the name of a group of photographers.

In the UK, they flip dimensions and talk about 5 x 4 and 7 x 5 film.

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