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11-22-2012, 11:25 PM   #1
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What is the circle of confusion for the Q?

I have a nice DoF app for my iPad but to use it for the Q I need the circle of confusion number, anyone know it?

11-22-2012, 11:33 PM   #2
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11-22-2012, 11:33 PM   #3
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The Online Depth of Field Calculator uses 0.005 mm for the Q
11-23-2012, 06:59 AM   #4
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QuoteOriginally posted by demp10 Quote
The Online Depth of Field Calculator uses 0.005 mm for the Q
Thanks. The iPad app doesn't have the Q in its database and I just didn't check the online version. I appreciate it.

I have two DoF calculators for the iPad - DOF Master and Depth of Field (aka Photographic Depth of Field Calculator).

DoF Master is pretty worthless unless you have a camera that is listed in their preset list - the K cameras are there and it's useful for them, however the Q is not and there is no way to enter the Circle of Confusion as a separate data entry for this calculator.

Depth of Field (aka Photographic Depth of Field Calculator) is much more customizable and does allow the CoC to be entered by the user. Oddly their "SS" category is 0.005mm so it works a treat for the Q (the DoF masters P&S setting is wrong in its calculations and I have to believe because its CoC is wrong but we can't access that to check).

So, if you want an App for the iPad/phone/touch the Depth of Field (aka Photographic Depth of Field Calculator) is a much better choice for Pentaxians because it covers all out cameras natively and is much more flexible for the future.


Last edited by Docrwm; 11-23-2012 at 07:08 AM.
11-23-2012, 07:24 AM   #5
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It's actually recorded in the Q's EXIF. The online DOF calculator agrees with this.
11-23-2012, 07:39 AM   #6
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QuoteOriginally posted by baro-nite Quote
It's actually recorded in the Q's EXIF. The online DOF calculator agrees with this.
Thanks. I now have an iPad app that will let me work out a few things for the lenses. It's amazing what the hyperfocal distance is for the 8.5 at 1.9.
11-23-2012, 10:42 PM   #7
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QuoteOriginally posted by Docrwm Quote
Thanks. I now have an iPad app that will let me work out a few things for the lenses. It's amazing what the hyperfocal distance is for the 8.5 at 1.9.
Or the 5-15; wide open at 28mm its ~6ft to infinity!
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