Originally posted by Not a Number This feature appears to be exclusive to the high-end flagship models.
Yes, now it this seems to be the case. Unfortunately, it isn't really well known. When I spec'd out the K30, I saw that it had DOF preview, so I just assumed it would work the same way that it works on my K200D ( which was also a mid-range
model ). I figured having to use the FX button wouldn't be a big deal ( it actually turns out to be far less convenent! ), but I didn't think they would turn the meter off. It wasn't mentioned in any reviews, though to be fair, it's a somewhat obscure
function.
If I had known this in advance, it might have made me consider getting the K5 instead, though as I said, I don't use the old lenses as much as I used to.
Another way of thinking about these two features:
Using the DOF preview lever to meter is truly manual shooting - you meter the scene, and you set all exposure parameters manually.
Green button shooting is a form of Av auto-exposure. You set the aperture on the lens, you set the ISO on the camera body, and the green button gets the camera to set the shutter speed.