07-01-2016, 08:08 PM
Out of curiosity, which lens is it? This is sort of a long shot, but in between shots have you look through the front element of the lens (in good light) and determined that the aperture has returned to all the way open? You could also use the depth of field preview (with the lens set to f/8 or something.
I can say for sure that the live view works in mysterious ways, but it seems like you (within limits) get a preview of the exposure as it is making necessary adjustments. So, in the situation where the diaphragm does not always open back up you will see exposure, and also focus sometimes screwed up when using the viewer, but not when using live view.
If it does stick, though often it is not every time. LOL have you tried hitting it?
I can say for sure that the live view works in mysterious ways, but it seems like you (within limits) get a preview of the exposure as it is making necessary adjustments. So, in the situation where the diaphragm does not always open back up you will see exposure, and also focus sometimes screwed up when using the viewer, but not when using live view.
If it does stick, though often it is not every time. LOL have you tried hitting it?