"But at low ISO nothing can beat this camera." - CEO SIGMA

Started 9 months ago | Discussions thread
joejack951
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Re: What gimmick is this?
In reply to enemjii, 9 months ago

enemjii wrote:

joejack951 wrote:

enemjii wrote:

ISO rating is the measure of a photographic film's sensitivity to light (courtesy wikipedia).

That said, if Foveon sensor is able to capture more details at low ISO, which in turn means it is more sensitive to light coming through, is it really LOW ISO ? or is it merely fooling around with methods of measurement?

Digital camera "ISO" is not the same as film speed ISO. From the "Film Speed" Wiki page:

"For digital photo cameras ("digital still cameras"), an exposure index (EI) rating—commonly called ISO setting—is specified by the manufacturer such that the sRGB image files produced by the camera will have a lightness similar to what would be obtained with film of the same EI rating at the same exposure."

Notice the lack of the word "sensitivity." Your digital camera sensor does not capture light any differently at low ISO settings than it does at high ISO settings. The captured data is processed differently, though.

Yup. Which is why I used the word "GIMMICK". This is truly a world class gimmick pulled off by the digital camera world.

A "gimmick" to me would mean that something is touted as performing better than it truly does or being more useful than it really is. Digital camera "ISO" is neither.

ISO (International Organization for Standardization) still sets the standard for how to deal with the exposure index at different camera "ISO" settings. The "ISO" button on the camera was simply re-purposed from telling the camera which type of film was in use (or for which type of film to expose, if the photographer wanted to purposely under or over expose the film) to telling the camera which exposure index to use. That so many people misunderstand this does not make it a gimmick, though manufacturer's likely haven't helped in their marketing material (I can't cite anything specific but I imagine I could find misleading statements if I tried).

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