A Photography forum. PhotoBanter.com

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Go Back   Home » PhotoBanter.com forum » Photo Techniques » General Photography Techniques
Site Map Home Register Authors List Search Today's Posts Mark Forums Read Web Partners

Calculation of best focus point



 
 
Thread Tools Display Modes
  #1  
Old May 26th 07, 01:31 PM posted to rec.photo.technique.misc
Michael Quintero
external usenet poster
 
Posts: 2
Default Calculation of best focus point


Hi,

my question regards the calculation of the best focus point for a
situation in wich dof should extend from some near limit different
from the hyperfocal point to infinity. I know about the formula 2*X*Y/X
+Y (where X is the near limit of dof and Y is the far limit) to give
the best focus point but what value do I have to set for Y if it
should be infinity? - 0 or some negative value?

Any input very welcome!
Michael

  #2  
Old May 26th 07, 03:48 PM posted to rec.photo.technique.misc
BrJohan
external usenet poster
 
Posts: 4
Default Calculation of best focus point


"Michael Quintero" skrev i meddelandet
oups.com...

Hi,

my question regards the calculation of the best focus point for a
situation in wich dof should extend from some near limit different
from the hyperfocal point to infinity. I know about the formula 2*X*Y/X
+Y (where X is the near limit of dof and Y is the far limit) to give
the best focus point but what value do I have to set for Y if it
should be infinity? - 0 or some negative value?

Any input very welcome!
Michael


The value of the expression for 'best focus point' approaches 2*X when Y
approaches infinity.

/BJ


 




Thread Tools
Display Modes

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

vB code is On
Smilies are On
[IMG] code is Off
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Macro question and calculation Jonathan Sylvestre Digital Photography 4 May 13th 06 04:53 PM
7-point 350D focus Dino Digital SLR Cameras 0 July 6th 05 08:25 PM
300D Centre focus point very dull Marli Digital Photography 2 August 26th 04 09:51 AM
calculation of focal length TS Digital Photography 21 August 8th 04 06:48 PM
dilution calculation Lloyd Erlick In The Darkroom 0 June 26th 04 04:25 PM


All times are GMT +1. The time now is 04:28 PM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 PhotoBanter.com.
The comments are property of their posters.