Understanding & Calculating Relative Depth of Field
Have you ever wanted to compare the depth of field of two different lenses?
I am going to share a very simple formula with you in this article that will help you understand the relative depth of field between two lenses.
For example, you may want to know the relative depth of field between two lenses at portrait distance.
The formula is simple: Relative Depth of Field = (f1/f2)2. Where f1 is lens one, and f2 is lens 2.
Let's work through an example. A 50mm lens compared to a 300mm lens would be (300/50)2 = 36. This means the relative depth of field for a 50mm lens is 36 times greater than a 300mm lens at the same aperture and distance. The key is understanding that we are making these calculations for the same aperture and distance.
I think this is why I love the older film small-format cameras. I loved the old lenses because I knew the hyperlocal distance at a glance (the closest distance that appears sharp when the lens is focused at infinity).
Give this a try in your style of photography and then let me know how you are applying this knowledge to your style and genre.
NEW ANALOG PHOTOGRAPHY COMMUNITY
If you like the information in this article, then you will love being part of my new Analog Photography Community where we share additional member only details in addition to creating exclusive video tutorials, and detailed articles every week to help analog photographers take their creative vision and technical skills to a higher level.
ANALOG PHOTOGRAPHY LAUNCHPAD
TRAINING FOR ANALOG PHOTOGRAPHERS
Read Testimonials from photographers and collectors from around the world.
Buy Your Photography, Video, & Technology Gear at No Additional Cost To You From B&H Photo
Fujichrome Provia 100F - Fujichrome Velvia 100 - Fujichrome Velvia 50 - Kodak Portra 160 - Kodak Portra 400 - Kodak Ektar 100 - Fujicolor Pro 400H - Fujicolor Crystal Archive Silver Gelatin RA4 Paper - RA-4 Color Print Processing Developer & Processing Chemicals - Color Darkroom Enlargers
ILFORD B&W FILMS & DEVELOPERS
KODAK B&W FILM DEVELOPERS
DARKROOM SUPPLIES & EQUIPMENT
Note: I participate in affiliate programs where I earn a small commission on some select products that I provide links for on my website at www.timlaytonfineart.com. When you use these links, I earn a small commission and there is no additional charge to you.
Keywords: black and white photography, darkroom, darkroom digest, large format, large format photography
"(closest distance that appears share when the lens is focused at infinity)." I think you meant "sharp".
Glad your posting more articles. I check in every couple of days.
No comments posted.
Recent PostsLarge Format Pictorialist Silver Gelatin Prints Are The New 21st Century Alt Method Darkroom Diary Episode 23 (Ultra Large Format Silver Gelatin Contact Print) Darkroom Diary Episode 22 (Mounting Ice Princess Silver Gelatin Print) Darkroom Underground Episode 1 - Ultra Large Format Paper Negatives Darkroom Underground Episode 1 Preview - Ultra Large Format Paper Negatives at Hodgson Mill New Darkroom Underground Analog Photography Membership Darkroom Diary Episode 21 (Testing Ilford WT as an 8x10 Large Format Paper Negative) Darkroom Diary Episode 20 (TT Signature Pictorialist Lens) How To Make Enlarged Analog Negatives Darkroom Diary Episode 19 (DIY LED Lightbox For Viewing Film)