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Old Jan 29, 2003, 9:45 AM   #1
Join Date: Nov 2002
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Default C-4000 Hyperfocal Length

I found the following on an online photo tutorial site:

“If you want to work out the hyperfocal distance for your lens(es) you can use the equation above - although for digital cameras you will need to know the 135 format "equivalent" focal length (check the camera or lens's manual).”

My Olympus C-4000 owner manual states the following:

“Olympus lens, 6.5mm to 19.5mm, f2.8, 8 elements in 6 groups (equivalent to 32 mm to 96mm lens on a 35mm camera).”

Is this the information I need to determine the hyperfocal length?

If so, is the 32mm without zoom and the 96mm with full zoom? Or vice versa?

Thanks – Ted.
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Old Jan 30, 2003, 12:06 AM   #2
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Default Follow up question



there is a tutorial about depth of field which seems closely related to the tutorial at


on hyperfocal distance.

I am having trouble understanting how that equation of

d = s/ [1 ± ac(s-f)/f˛]

relates to the equation of

h = f˛/ac

Any advise you can offer would be greatly appreciated.
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Old Jan 30, 2003, 4:43 AM   #3
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For those who don't want to deal with the depth of field math, but just want to learn the effects of shutter speed and f-stop should check out this site which has a camera simulator:


There you are shown the scene which you are "photographing." You then select the shutter speed and f-stop, and then click "Shoot It"...on the right side you then see the picture you'd get with those settings.

Of course every camera is different, and the F-Stops might not go as high as they have on the site (my C-700 only goes up to F8, whereas the simulator has F11, F16, and F22 (but the C-700 has more stops within its range)).
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Old Jan 30, 2003, 9:26 AM   #4
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I would suggest you try this site:
On the chart, use .006 as the "Circle of Confusion" for an OLY 4000.
BTW, although technical specs for the 4000 are 6.5 - 19.5, the reality will be slightly different. I only come up with 6.8 to 19.1 and I notice other people also get about the same.
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