Google| Subject | Re: ISO value names are becoming ridiculous |
| From | Peter Irwin |
| Date | 01/06/2016 17:11 (01/06/2016 16:11) |
| Message-ID | <n6jeaq$del$1@dont-email.me> |
| Client | |
| Newsgroups | rec.photo.digital |
| Follows | Sandman |
| Followups | Sandman (6h & 20m) |
Sandman <mr@sandman.net>wrote:
SandmanIn the early 60s an EI of 3 (Sv=0) would be used for a 25 speed B&W film with a red #25 filter or 10 speed Kodachrome with a conversion filter for 3200K lamps. This is very slow, but since the standard already exists, what is the sense of changing the value by 5? - it makes better sense to resurrect the existing APEX system than to arbitrarily create a new one.
Absolutely, and it made perfect sense, only it had a value of 0 at ISO 3, far below any used film and sensors used today.
Peter. -- pirwin@ktb.net
01/06/2016-
