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infinity

Started Mar 30, 2016 | Discussions
SeemoreTate New Member • Posts: 1
infinity

focused 1.8 metre from camera

https://drive.google.com/file/d/0B6xdcHAiP-CgVlZnUmlPX19YQTg/view?usp=sharing

link to full size image above, the full size image shows the window sil of which a took all shots from.

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focused on this wall

this is the link to the full size of the above image

https://drive.google.com/file/d/0B6xdcHAiP-CgYTJraXlQZThheU0/view?usp=sharing

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focused on the chimney

https://drive.google.com/file/d/0B6xdcHAiP-CgUDhrcGJwVXNaZFE/view?usp=sharing

above is a link to the full size image

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Hello, I am shooting a pano using the canon 8-15mm lense. I have always had issues with focusing on landscapes.

I include the 3 cropped images above and links to each of the each individual uncropped, feel free to download and distribute were you to want.
My question is, focus. I see the image where I focused on the distint chinmey as more in focus than the one focused 1.8 metre from camera which I was under the belief was the hyperfocal point.
Does anyone have a focus distance which they focus on using the canon 8-15mm which they swear by and give the best sharpness.
regards
Seemore

photonius Veteran Member • Posts: 6,895
Re: infinity

SeemoreTate wrote:

focused 1.8 metre from camera

https://drive.google.com/file/d/0B6xdcHAiP-CgVlZnUmlPX19YQTg/view?usp=sharing

link to full size image above, the full size image shows the window sil of which a took all shots from.

well, in the dof calculators that there are (e.g. dofmaster.com) you could enter the actual pixel size of your camera, instead of the normal CoC for the format of your camera.

The simple reason is that the CoC (circle of confusion) based on which hyperfocal distance is calculated, is actually larger than the size of the pixels of your sensor. So, if you go and zoom in to 100%, pixel peeping, yes, it will not be perfectly sharp. The CoC is calculated to appear sharp for a person standing a certain amount away from a printout of the image of a particular size, so a little unsharpness will not be seen. You probably demand pixel level sharpness, then you need to make the CoC for the DOF calculation smaller.

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