Author Topic: Focus Stacked Flax Field  (Read 602 times)

garry23

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Focus Stacked Flax Field
« on: May 19, 2019, 04:48:57 PM »
Needed a break from working in our garden, so popped out to the flax field just up the road.

5D3, f/8, 1/200s, Dual ISO 100/1600.

Captured using my auto focus bracketing script: three images.

Processed in PS using simple layer masks.




whitelight

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Re: Focus Stacked Flax Field
« Reply #1 on: May 20, 2019, 10:42:43 AM »
Hi garry, wonderful shot... Which lens did you use?

garry23

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Re: Focus Stacked Flax Field
« Reply #2 on: May 20, 2019, 01:22:27 PM »
@whitelight

A Sigma 12-24mm at 12mm.

Some would assume you could capture the scene in one shot, ie by focusing at the hyperfocal and they would be right if they wished to 'just' show the image on Facebook, say.

The issue of 'just' using the hyperfocal is that, by definition, the defocus blur at infinity and at half the hyperfocal is the so-called CoC, ie what we use in ML. Also most will use the 'standard' , FF, 30 microns.

I personally prefer a capture strategy that 'guarantees' the best focus data from the field, that I can degrade myself in post, ie for Facebook, but also use at high quality if I print the image for close scrutiny.

Based on this, if needed, I will typically take an image at the (30 micron) hyperfocal, one at 2-3 times the hyperfocal; ie infinity blurs at Coc/2 to CoC/3; as well as additional images in front of H/2 as required. There is no point focusing much beyond 2xsensor pitch.

Hence the latest two scripts that I wrote for my 5D3 and EOSMs (vis and IR): one script allows me to set the focus brackets manually, the other automatically (which I did with this lens). In both I can control the defocus overlap blur.

whitelight

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Re: Focus Stacked Flax Field
« Reply #3 on: May 20, 2019, 10:53:53 PM »
Thanks for the detailed answer

BlazeMagic

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Re: Focus Stacked Flax Field
« Reply #4 on: June 22, 2019, 07:50:55 PM »
Both beautiful landscape and very well taken!!!