It's hard to focus with a large aperture! !

The problem is that there are two 1. Because the depth of the large aperture bell shadow is too shallow, there is obviously less defocus. The solution is to narrow the aperture or the distance from the subject and lengthen the depth of field by 2. There are many cases in which Canon lenses are out of focus in the market.

Mainly the lens clamping problem.

Many large aperture mirrors are designed to be more useful than 35mm.

The effect of using aps will be problematic.

The solution is to use Canon as a cal mirror.

Or with the latest 40d (because 40d can set the focal length adjustment of each lens. of course

Manual focusing can solve the trouble of autofocus error.

But the performance will slow down.

Might as well take some time to move the mirror back to the factory, Carl.

Reference: My own experience

My work zooo.omuser

Reduce the aperture by one or two.

Increase depth of field range

The fragments are very clear.