[IMPOSSIBLE] Auto-ISO: smaller steps than +-1ev

[Marsu42]

First, there is a bug in the current help description for Auto-ISO: It says the t/f values are +-0.5ev, but in fact they are +-1ev

However, the help text describes how it imho should be (and maybe was planned?): Full stop steps are quite large, it'd be nice to really have +-0.5ev or +-1/3ev - whatever is selected in the Canon menu C.Fn I: Exposure level increments

[a1ex]

Can't reproduce the problem, it's +/-0.5 here.

[Marsu42]

Can't reproduce the problem, it's +/-0.5 here.

The selection drop-down in the menu is for example has t = 1/1000 and 1/2000 and f = 4.0 and 5.6 ... +-0.5ev steps would include 1/1500 and 4.5, +-1/3ev steps 1/1250+1/1600 and 4.5+5.0

[a1ex]

The 0.5 is not the distance between two steps, but the acceptable error of the computations. So, if you select 1/1000, that means anything between 1/700 and 1/1400.

Analog ISO can be set only in full stops, so it's not really possible to reduce this interval (you will have either a small difference in shutter/aperture, or a small under/over exposure).

[Marsu42]

Analog ISO can be set only in full stops, so it's not really possible to reduce this interval (you will have either a small difference in shutter/aperture, or a small under/over exposure).

Ok, that wasn't self-explanatory and the help text is confusing sine I might not be the only one thinking +-0.5ev is what you can set. Still at least 1/4000 could be added, see here http://www.magiclantern.fm/forum/index.php?topic=4843.0

[a1ex]

Whenever you say that the help is confusing, please provide an alternative.

[Marsu42]

Whenever you say that the help is confusing, please provide an alternative.

I couldn't think of a smashing line, that's why I didn't - how about "Pref. shutter/aperture for Av/Tv mode (+/- 0.5 EV variance)."?

[a1ex]

Well... variance is the squared deviation, so you would measure that in EV^2

[Marsu42]

Well... variance is the squared deviation, so you would measure that in EV^2

Argh, that's why I skip doing help texts (I'm no native speaker obviously) :-p ... but my dictionary has also "deviation", how about that. Any word really that makes it clear +-0.5ev is for the result and not the setting. for other terms see: http://dict.leo.org/#/search=abweichung&searchLoc=0&resultOrder=basic&multiwordShowSingle=on