Originally posted by jatrax ...
But I suspect that would be low on the do to list for Ricoh. Not many new lenses made that require stop down metering
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I just scrolled through the menu function to make sure I wasn't missing a setting, but I don't see anything. Yes, I expect it is low on the feature list for the reasons you said, but one of the great things about Pentax is how far they've come to enable backward compatibility to old lenses. It seems like having the GB change the ISO would be at least as easy as it is to have it change the shutter speed. It obviously couldn't change the aperture on a non-a lens, but I don't think I would want it to. An option between the two would be nice.
It's a good feature as it is, where it would get me some more photos is when the subject or light changes. Let's say I'm photographing a squirrel or kid playing and I have my shutter speed and aperture where they need to be (-ish), I meter and all is good, then they move into different light and there's a moment that I want to capture. If I GB it, and there is less light, it will drop my shutter speed to some unacceptable level and I'll have to adjust ISO and shutter speed to get exposed properly then the moment is probably gone. But if the GB just raised the ISO, I'd get the shot. I can skip the GB and manually raise the ISO, but I'm guessing by how much, which is the opposite of metering.
In that same scenario if they moved into MORE light, it would be fine because faster shutter speed would not ruin the shot.
Anyway...it's a good feature and there are other lens choices for those scenarios, but I happen to be "walking around" with an M lens this week and it got me thinking about it, not for the first time, so I thought I would lament.
---------- Post added 04-01-15 at 10:05 AM ----------
Originally posted by stevebrot Hmmmm...that would be an interesting twist, though I am not sure how it would be implemented, perhaps using the optical DOF preview and a special custom menu setting?
BTW...thanks to this question, I just discovered a previously unknown (at least to me) feature of the K-3 when using M-42 lenses. In Av mode you can switch to auto-ISO and the camera assumes a program mode with aperture floating freely and the shutter speed changing only as needed. Very cool.
Steve
I'm not sure what you mean by "Auto-ISO", but I discovered earlier this year that I'm happy shooting wide open with a non-A lens, I can set it to Av mode, set the ISO to something and then have it adjust shutter speed for me. Is that what you mean or am I missing a trick?
---------- Post added 04-01-15 at 10:12 AM ----------
Originally posted by Lowell Goudge Implementation would be easy, today, when you stop down with green button, it measures the light through the lens, and using the ISO setting calculates shutter speed, no big deal to impose shutter speed and let it calculate the needed ISO within range of the auto ISO setting, and only if ISO would be outside the range, set the shutter speed as required, slower if ISO at maximum, faster if ISO is at minimum, to still make exposure.
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Yeah, this is exactly what I mean. I thought about the issue of hitting limits too. If it can't stop down or up enough to get the exposure with the shutter speed and aperture I've imposed, but the same problem exists when changing shutter speed as well, though I suppose the range of SS is larger so it's inclined to happen less often. It's really another argument for enhancing this feature. If you menu select that you want it to change ISO first, within a range, then it can go to shutter speed when it hits a floor or ceiling. If you want it to work the other way, it could, just by specifying the order in a menu.