Quote Originally Posted by Chan Tran View Post
I really hate this mirror pre fire feature it's a problem not a feature. Most of my cameras have MLU but I never use that feature.
Your camera needs a CLA. Getting better with use usually means the lube has thickened.

The mirror pre-release takes a deliberate action to accomplish. Just depressing the shutter button will not do it; the camera will go through the whole cycle.
On a healthy camera, the shutter button must be "flicked' very rapidly. The flick depresses the the button for a fraction of a second, enough to release the mirror, but the button goes back up before the rest of the cycle can commence.