Successful photography requires a thorough grasp of the ways in which lens selection, image sharpness, and perspective work together to create the desired image. A photography professional must consider focal length, type, and speed when making a lens selection. Additionally, photographers must consider how lens attachments, such as extension tubes, ,filters and supplementary lighting, affect the resulting image,
Knowing how to select the physical lens and attachments is important, but not if you don't know how to use them! A photography professional also needs to possess a solid understanding of how to adjust the camera settings, where to position themselves in relation to the subject, and how to use the tools printed on the lens itself to set up the camera ahead of time. Without this know-how, a photographer might miss the perfect shot while trying to adjust settings during a photo shoot.
Ultimately, to craft a well-formed image, a photography professional must understand not only which lens to choose, but also how the lens functions to create depth of field and/or perspective effectively. This resource provides instruction for users to:
Define focal length including how it impacts an image
Explain how to control a photograph's sharpness
Define perspective including how to create a desired perspective using the camera lens
Discuss various lens attachments