Thursday, October 31, 2013

Understanding and Achieving Image Focus and Sharpness: Part I

Nikon 51 point Autofocus System layout in the Nikon D4 DSLR, photo courtesy of Nikon CorporationImage sharpness depends on multiple factors including focus.

While it's true an image can't be sharp unless the subject is in focus, the converse is not necessarily true, that an image which is in focus, will necessarily be sharp. Image sharpness is fundamentally controlled by focus, but there are other important factors which enable in-focus images to be sharp.

In this multi-part series, we'll discuss what it takes to make a photograph look sharp. We'll look at how to successfully focus your camera on your chosen subject, and how to make your well focused image actually look sharp.

In Part I we'll look at how modern digital cameras autofocus (AF), and what factors influence AF systems' ability to focus quickly and accurately.

NSL Photography Tip: Add Important Photography dates to your Appointment Calendar

Date-Time GraphicFor all photographers using a digital camera, keeping the date and time accurately in the camera is very important.

The date and time of every photograph is embedded in the meta data for each image, each time the image is made and saved in the camera. These are important pieces of information for photographers.

The date and time in each photograph's metadata establish precisely when the image was made. It helps for verification during photo editing. It's tremendously helpful in later identifying images, and greatly assists photographers in organizing their images.