This article is intended for the DSLR camera user, who has some notion of what DOF and apertures are, in relation to imagers. However, we welcome you to read the following regardless of your photographic experience or level, because it will eventually make sense to you.
The most common complaints we hear from most photographers of any experience level is "my images aren't sharp", and "I can't get my focus to lock". Most want to blame their equipment and, while there are many instances that equipment is to blame, we have found a vast majority are just simple user error. This is often down to a lack of understanding of how an autofocus (AF) system works. This tutorial will give you a better understanding of focus and sharpness, and hopefully help you take photographs that you're very happy with!
In this page we examine the MTF of scanners and sharpening algorithms, and we address the question, "What scanner resolution (pixels per inch or dpi) is required for a digital print to appear sharper than a conventional darkroom print?"
One way to improve sharpness in dim light is to increase the camera's sensitivity. This works in places such as theaters and gyms where subjects are too far away for flash to work and where you need a faster shutter speed to eliminate blur. It also is a good way to get pictures without using flash in places such as concerts and museums where flash is prohibited.
Here's a short guide to shooting several photographs to make an ultra sharp close focus shot. We will explain how to shoot, and then what software will combine the shots to give you ultra sharp results.