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Apr 21, 2011 at 8:17 vote accept Stéphane Péchard
Apr 20, 2011 at 3:33 comment added Evan Krall On the D7000 at least, you can program one of your user modes to emulate the TAv mode coneslayer describes. To do this, first set your shooting mode to M, then set up the Auto ISO settings. Save these settings to U1 or U2. Having this mode means ISO is no longer the odd variable out among the variables in the exposure triangle.
Apr 19, 2011 at 14:05 comment added bwDraco @SimonAEugster: Sorry. I withdraw this comment.
Apr 19, 2011 at 6:08 comment added Simon A. Eugster @DragonLord Now you nearly shocked me: Does my Auto-ISO only work on Shutter and Aperture priority, but not on Manual mode? Fortunately not (checked); it works for both the D90 and the D7000, and I can additionally chose an upper limit for the ISO. So that's the Nikon TAv mode :)
Apr 19, 2011 at 3:52 comment added bwDraco @coneslayer, note that not many people can use the TAv mode. No other brand, except perhaps the Samsung GX series based on Pentax cameras, has this mode, and not all Pentax models support it—only the more advanced models do. I use a Pentax K-r, and I don't have this mode; the more expensive K-5 does. In any case, high ISO performance has dramatically improved over the years and you can often get a usable shot at ISO 3200.
Apr 18, 2011 at 19:59 comment added coneslayer @Simon, I shoot a Pentax K10D, which has a so-called "TAv" mode, where you set both the aperture and shutter, and it picks the ISO automatically. So if that's how I want to work, I'd pick that mode in Step 2. That's a camera-specific detail, though, and most other makes handle it differently, as you describe. (The K10D has a pretty narrow range of usable ISOs compared to newer models, so I don't actually tend to use this mode much.)
Apr 18, 2011 at 19:51 comment added Simon A. Eugster Expressed very precisely. Nice. Perhaps a note on ISO – there is Auto ISO as well. Not important when it's bright enough, but for dark scenes (like, concerts) I might wish to stay at the lower limit of shutter speed that I can still hold stable and chose an appropriate aperture, and let the camera do the ISO magic (especially if lighting conditions change quickly; no chance to adjust correctly by hand, at least not for me).
Apr 18, 2011 at 17:04 history answered coneslayer CC BY-SA 3.0