As I work with my G1 in the field, I have to admit that I DO MISS my old Canon 35mm cameras and the incredibly crisp viewfinder images that helped me to focus. I still have a tough time using the LCD to obtain precisely focused images under certain conditions and wonder if others have this problem too, and might have developed techniques or tools to help them with obtaining critical focus. When you get it right, the G1 really delivers on sharpness, but it's frustrating to come home from a shoot and find that you were a little to close, or a little to far away, and so the part of your subject you wanted to be really sharp is just a little bit fuzzy
I'm trying out two ideas for focusing macro images. First, I'm using an old Canon bellows rack mounted on my tripod, with the G1 mounted on the end of the rack. Once I have the tripod positioned, I can crank the camera back and forth within a range of about 6 inches. Don't know where you might find one of these, but mine is really handy - I've used it that way for years and would never give it up.
But that still doesn't help me determine focus from the LCD. I use an XTend-a-View Pro from Eagle Eye Optics, which helps to some extent, but it also tends to magnify the pixels on the LCD. So next time I go out (we're having a major spring snowstorm today) I'm taking along a small plastic or metal ruler. I figure I can place it next to the object I want to focus, and determine focus from the markings on the ruler rather than from the object itself. It seemed to work when I tried it here at home. Obviously this technique won't work for some subjects (like poisonous snakes).
Any other ideas out there?