Focal length 35mm equivalent, but not F-stop?

Started Jul 24, 2014 | Discussions thread
Chikoo
OP Chikoo Senior Member • Posts: 1,630
Re: Focal length 35mm equivalent, but not F-stop?

eyeswideshut wrote:

Chikoo wrote:

Beachcomber Joe wrote:

Because it is not necessary.

Says who?

The f stop of lenses has always been marketed and thought of as an indicator of its light gathering ability, not its depth of field. This is why we refer to lenses with wide apertures as fast, not shallow. That ability does not magically change with format. In the heyday of film and until recently in digital, photographers were ISO restricted in low light conditions. The difference of a stop of light gathering ability was a significant reason to pay the premium in cost, weight and size for a fast lens. That is how most fast lenses have been marketed and the primary reason those lenses are purchased. In many cases the shallower depth of field of the faster lens was looked upon as a negative.

That was then. You got to change with the times.

Says who?

Aren't you the guy who so innocently posted the original question? Seems it was quite loaded with a preconceived answer after all, eh?

Beachcomber comes along and state "Because it is not necessary". Even an innocent person like me would be ruffled by such forceful statements.

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tko
tko
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