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Re: ISO value names are bec...

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SubjectRe: ISO value names are becoming ridiculous
Fromnospam
Date01/06/2016 16:10 (01/06/2016 10:10)
Message-ID<060120161010391711%nospam@nospam.invalid>
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Newsgroupsrec.photo.digital
FollowsSandman
In article <sandman-2443bd849b334e98149abd0e6b003060@individual.net>, Sandman <mr@sandman.net>wrote:

Sandman
So with the D5, it can boost its ISO to ISO 3,280,000, and suddenly how ISO is named is becoming just stupid.

there's nothing stupid about using iso. it works just fine.

We should use EV steps instead:

ISO 50 : ISO EV-1 ISO 100 : ISO EV 0 ISO 200 : ISO EV+1 ISO 400 : ISO EV+2 ISO 800 : ISO EV+3 ISO 1,600 : ISO EV+4 ISO 3,200 : ISO EV+5 ISO 6,400 : ISO EV+6 ISO 12,800 : ISO EV+7 ISO 25,600 : ISO EV+8 ISO 51,200 : ISO EV+9 ISO 102,400 : ISO EV+10 ISO 204,800 : ISO EV+11 ISO 409,600 : ISO EV+12 ISO 819,200 : ISO EV+13 ISO 1,638,400 : ISO EV+14 ISO 3,276,800 : ISO EV+15

using ev was tried with film long ago and it was a miserable failure.

there's no need to repeat that mistake.

That would put more normal values to these numbers. The Hi5 setting of the D5 sounds unbelievably high, which of course it also is, but it's "only" twice as "sensitive" as ISO 12,800, but the way ISO is named makes it look stupid as fuck.

the hi5 setting, or iso 3,276,800, is *eight* times as sensitive as iso 12,800.

3,276,800/12,800 = 256 = 2^8.

it's also 5x as sensitive as 102,400, the highest native iso, thus the name hi5.

And, when talking about ISO, you'd just say "it was shot at ISO 3" instead of ISO 800.

which would confuse the hell out of people.

And the new D5 would have a max ISO value of "ISO EV+10" which can be pushed in-camera to "ISO EV+15", which would still be equally impressive.

no.