how to find hyperfocal length on my 17-55 F/2.8 lens


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audibum

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Oct 23, 2006
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#1
can anyone shed some light on this? can't seem to locate it, tks

is there a focal length to hyperfocus at every F/stop?
 

nuxnewbie

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Nov 2, 2006
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#3
You can't locate it because the hyperfocal distance varies with focal length.

As such, it is difficult to include depth-of-field markings on a zoom lens, such as your 17-55mm.
 

Denosha

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Dec 25, 2003
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#4
The rule of thumb is to focus 1/3 of the way into the scene. Yes, it's not 100% accurate but it's good enough, considering that you don't need to calculate anything.
 

zac08

Senior Member
Feb 21, 2005
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#5
It also depends on which camera you're using. For Nikon and Fujifilm DSLRs, there is a table which I got from Nikonians webbie.

Generally, if you're using a standard f11 then at :

17mm - 1.3m
20mm - 1.8m
24mm - 2.5m
28mm - 3.5m
35mm - 5.4m
 

audibum

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Oct 23, 2006
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#6
tks for all your help, will go try it out...
 

Aug 31, 2005
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#7
Er, quite easy to calculate actually.

The formula to find Hyperfocal Distance is:

Sq of Focal Length
------------------ (mm)
CoC x Aperture

where CoC (Circle of Confusion) for your D80 is 0.02, and Aperture is f/stop number.

In the field, if your hp is without a calculator function, use Denosha's method which is fairly workable.
 

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