Quote:
Originally Posted by stunsworth
Mark, there's no automatic linkage between the camera and the lens. So as you stop down the lens the aperture size changes and the image seen though the viewfinder changes.
Typically what I'd do is focus with the lens wide open and then stop down the lens immediately before firing the shutter. After a while it becomes second nature to know how far to turn the aperture ring without taking your eye away from the camera.
I've taken thousands of images using this method with various Canon dSLRs.
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My technique is slightly different if using a tripod: I use Live View and focus at 10 x magnification, then stop down and re-check focus (if there's enough light). I only do this for focus-critical situations where there's plenty of time but it does allow one to adjust for any focus shift.
In my recent and limited experience (I have two adaptors, one AF confirming, and I don't trust either of them 100% but have more arriving soon) you wouldn't want to entrust an important shot with a wide open aperture to the AF confirmation feature: it is simply not accurate enough, on my setup at least, though Jamie has a different experience and certainly a different adaptor.
The other factor that I have yet to bottom out is metering, I am getting random underexposed shots and though I think I know why, it's rather long and involved and I'm just getting to the bottom of it now!
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