Go Back   Steve's Digicams Forums > Digital SLR and Interchangeable Lens Cameras > Canon Lenses

Thread Tools Search this Thread
Old Dec 6, 2006, 1:28 PM   #1
Junior Member
Join Date: Dec 2006
Posts: 8

Is there a chart that will show the differences in lens's distance to background Bokeh effect? For instance on my 50mm at 1.4 apeture I get great background blur at 3 ft behind subject. How do I calculate the distance to background needed for the same effect on say 100mm at 5.4? Is there a chart for that?

Thank you
shawn.cook is offline   Reply With Quote
Sponsored Links
Old Dec 6, 2006, 8:08 PM   #2
Join Date: Aug 2004
Posts: 8,529

Well, bokeh typically refers to the quality of the blur. That's tough to quantifiy. But, you can qualify what the depth-of-field is that is how deep the focus plane is. Two different lenses can have the exact same DOF, but lens A could have more pleasing bokeh.

Here's a link to calculate DOF using a given camera, aperture and focal length:


JohnG is offline   Reply With Quote
Old Dec 7, 2006, 2:12 PM   #3
Senior Member
Join Date: Feb 2006
Posts: 431

anyone have the link to thevisual dof calculator that shows pictures of salt&pepper shakers?
urbanaries is offline   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

All times are GMT -5. The time now is 7:35 AM.