Focal Lengths

Focal length is the distance in mm from the optical centre of the lens to the focal point, which is located on the sensor. A focal length of 50 mm is called 'normal' as this is the way we see things with the naked eye, which yields a picture angle of 46 degrees.

Wide angle lenses (short focal length) capture more because they have a wider picture angle, whilst tele lenses (long focal length) have a narrower picture angle.

Lenses with shorter focal lengths produce images with larger depth of field. For instance, a 28 mm lens at f5.6 produces images with greater depth of field than a 70 mm lens at the same aperture.

Compact cameras have short focal lengths and therefore have great depth of field throughout their range. A shallow depth of field can be used to isolate the subject from a busy background. On a compact you will have to use the Macro mode to achieve this.

Digital Photography Mastery

Digital Photography Mastery

Insider Secrets Revealed By the Pro Showing You How to Become a Professional Photographer! Discover The Secret Tips & Techniques On How To Be A Professional Photographer, Start Producing High Quality Pictures and Skyrocket Your Photography Business Income Revenue To The Roof TODAY! You're About to Discover the Powerful Strategies and Method to Start Taking Sharp, Clear and High Quality Pictures Like the Professional Photographer Without Paying a Single Penny to the Expert!

Get My Free Ebook


Post a comment