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Author Topic: In camera focus bracketing  (Read 2063 times)

GeraldB

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In camera focus bracketing
« on: February 22, 2012, 02:31:56 pm »

As I understand it (and I may well be wrong), the auto focus mechanism in a DSLR has a range-finding element to it. IF this is true then given that the camera knows the range to the subject and the aperture it can calculate the DOF and thus provide focus bracketing with overlapping pictures all nice and ready for Helicon on other software focus blending. Is this feasible in principle with current DSLR technology and if it is why is no one providing or asking for it?

Walter Schulz

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Re: In camera focus bracketing
« Reply #1 on: February 22, 2012, 03:10:33 pm »

Take a look into Magic Lantern. It is a firmware extension/add-on for Canon DSLRs with APS-C size sensor (without 7D) and 5D MK II.
There you will find bracketing and a lot of other things.

Ciao, Walter
« Last Edit: February 22, 2012, 03:12:32 pm by Walter Schulz »
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BernardLanguillier

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Re: In camera focus bracketing
« Reply #2 on: February 22, 2012, 04:12:14 pm »

On the nikon side it seems that until last year the SDK only provided the ability to apply delta focus increments, no acces to the absolute distance.
 
I have not checked whether hacks could lift this important limitation.

Cheers,
Bernard

GeraldB

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Re: In camera focus bracketing
« Reply #3 on: February 22, 2012, 04:15:24 pm »

Interesting stuff, I didn't know was going on. The focus stacking feature in Magic lantern is just what I want for my D300 (soon to be D800). I'm quite happy to be about the 500th person to install it  :) once its been produced. That's about my risk tolerance.

EricWHiss

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Re: In camera focus bracketing
« Reply #4 on: February 22, 2012, 06:11:07 pm »

The Hy6/AFi has this built in - you can select up to 9 frames.
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