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What do those 3 lens f numbers mean...
A very basic question: a lens of f2.8 - f3.7 shows the aperature from biggest to smallest? but what if the lens is F2.8 - F3.7 / F11 (Panasonic FZ50) ... what do the three f numbers mean?Brian..

Comments (7)

It means that the largest aperture changes, depending the (zoom) setting..

For example, an 18-200 f3.5-5.6/f22 would have a max aperture of 3.5 when set to 18mm but 5.6 when set to 200mm. The smallest aperture is always f22..

Comment #1

Howard Moftich wrote:.

It means that the largest aperture changes, depending the (zoom)setting..

For example, an 18-200 f3.5-5.6/f22 would have a max aperture of 3.5when set to 18mm but 5.6 when set to 200mm. The smallest aperture isalways f22.

Sorry, but I'm really new at this and I'm still a bit confused..

Going by the FZ50 (12x 35-420mm with f2.8 - 3.7 / f11) I am considering buying ... the f2.8 is at the 35mm end and the f11 is at the 420mm end, where does the f3.7 come into it?Brian..

Comment #2

Wide end f2.8Tele end f3.7f11 is the minimum aperture..

I see the answer burn in your eyes, across the wasteland,Death into Life..

Comment #3

Sintares wrote:.

Wide end f2.8Tele end f3.7f11 is the minimum aperture..

I see the answer burn in your eyes, across the wasteland,Death into Life.

This is correct, but just to clarify something about aperture for someone new:.

A small f number means that the hole that lets the light in is bigger. Conversely, a large f number means the hole is smaller. This is why the larger f number (f11) is the minimum aperture...

Comment #4

Very simple. It just means that:.

At the wide end, the aperture range is 2.8-11At the tele end, the aperture range is 3.7-11..

Comment #5

The simpleset and best explanation yet. Not that the rest were wrong, this one's just the simplest.Rob.

Everyone, everywhere, has to do everything for a first time. There is no shame in failure, only in failure to try...

Comment #6

Losfp wrote:.

Very simple. It just means that:.

At the wide end, the aperture range is 2.8-11At the tele end, the aperture range is 3.7-11.

Thanks, that clears it up....

Brian..

Comment #7

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This question was taken from a support group/message board and re-posted here so others can learn from it.

 

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