DOF guide numbers for telephoto lenses

Joined
Feb 7, 2005
Messages
1,027
Location
Annandale, VA
Recently Flew pm'd me with a back of the envelope figure of depth of field for a particular lens. It occurred to me that I had no idea how he got that. Is there some source on how to go about finding/calculating these figures? Now that I'm shooting more birds and can see the distance on the lens to the subject and the aperture it would be nice to have some cheat cheet...or handy formula...nah, make that a cheat sheet to see what DOF I can expect on the bird. I know I'm not allowing enough right now.

Thanks, Rich
 
Joined
Feb 7, 2005
Messages
1,027
Location
Annandale, VA
Excellent Phil. Thanks; that was quick. Even stupid questions are answered in this place! Is the Cafe great or what? And the moderators, not only good looking, but smart....well, some of them!

Rich
 
Joined
May 17, 2005
Messages
12,616
Location
Pleasantville Ohio
from a non-super, non-moderator...

if that's allowed:smile:.

Rich, if you want to know more, download this small calculator (550k)from DL&C. You can use the calculator directly or, after reading the help file, construct a spreadsheet or perhaps enter the equations in your pocket calculator. Or, you can construct your own cheat sheet for selected lenses.
 
Joined
Feb 7, 2005
Messages
1,027
Location
Annandale, VA
if that's allowed:smile:.

Rich, if you want to know more, download this small calculator (550k)from DL&C. You can use the calculator directly or, after reading the help file, construct a spreadsheet or perhaps enter the equations in your pocket calculator. Or, you can construct your own cheat sheet for selected lenses.
Woo hoo! It gets even better. Thanks very much.

Update Great for PC owners. :frown:

Rich
 
Joined
Aug 1, 2006
Messages
13,855
Location
Massachusetts
I once saw a t-shirt with a hyperfocal distance chart on it......upside down, so that as you looked down at your t-shirt, you could read it. :biggrin:

I'm *sure* you could find something like that for DOF too!!!! :biggrin:
 
Joined
Jan 25, 2006
Messages
1,837
Location
Huntsville/Muscle Shoals, AL
Flew made his own (I think) in Excel, and if I can dig it up it has graphs and other cool things...so if you are still looking for one shoot me a PM, and I'm sure I can find it somewhere.
 

Latest posts

Links on this page may be to our affiliates. Sales through affiliate links may benefit this site.
Nikon Cafe is a fan site and not associated with Nikon Corporation.
Forum post reactions by Twemoji: https://github.com/twitter/twemoji
Copyright © 2005-2019 Amin Forums, LLC
Top Bottom