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Forum: General Discussion Sep 8, 2010, 9:03 AM
Replies: 59
Views: 5,691
Posted By TCav
No, it can't be altered by manipulating the...

No, it can't be altered by manipulating the photos.

Suppose that each of the component images, from left to right in the composite image, were shot at progressively smaller apertures. In the...
Forum: General Discussion Sep 7, 2010, 5:33 PM
Replies: 59
Views: 5,691
Posted By TCav
It's a composite image that has the same DoF as...

It's a composite image that has the same DoF as each of the component images.
Forum: General Discussion Sep 7, 2010, 3:01 PM
Replies: 59
Views: 5,691
Posted By TCav
That looks like HDR for DoF.

That looks like HDR for DoF.
Forum: General Discussion Sep 3, 2010, 10:12 AM
Replies: 59
Views: 5,691
Posted By TCav
:icon_lol::eek::grin::sprachlos020::icon_rolleyes:

:icon_lol::eek::grin::sprachlos020::icon_rolleyes:
Forum: General Discussion Sep 3, 2010, 8:59 AM
Replies: 59
Views: 5,691
Posted By TCav
Ain't that the truth!

Ain't that the truth!
Forum: General Discussion Sep 2, 2010, 7:45 PM
Replies: 59
Views: 5,691
Posted By TCav
Got it. This is an academic exercise.

Got it.

This is an academic exercise.
Forum: General Discussion Sep 2, 2010, 7:02 PM
Replies: 59
Views: 5,691
Posted By TCav
Suppose you have a photograph. (I know that's a...

Suppose you have a photograph. (I know that's a stretch for many of you, but humor me. :)) Suppose it's a photograph of the edges of pieces of paper. The pieces of paper are evenly spaced. One of the...
Forum: General Discussion Sep 2, 2010, 6:07 PM
Replies: 59
Views: 5,691
Posted By TCav
If you move backwards and forwards, how is the...

If you move backwards and forwards, how is the change in the blur that you might see when looking at a photograph different from the change in the blur that you might see when looking at a drawing?...
Forum: General Discussion Sep 2, 2010, 11:15 AM
Replies: 59
Views: 5,691
Posted By TCav
It's called "Circle of Confusion" for a reason....

It's called "Circle of Confusion" for a reason. As you get closer or further away from my photograph, your level of confusion about my photograph varies. It's your level of confusion that changes,...
Forum: General Discussion Sep 2, 2010, 9:46 AM
Replies: 59
Views: 5,691
Posted By TCav
No. The Circle of Confusion has changed. That's...

No. The Circle of Confusion has changed. That's all.

The following image is of a painting hanging on my living room wall. The image is slightly out of focus. The painting is flat, and therefore,...
Forum: General Discussion Sep 2, 2010, 9:24 AM
Replies: 59
Views: 5,691
Posted By TCav
Whatever. Change one so it has the DoF of the...

Whatever. Change one so it has the DoF of the other.
Forum: General Discussion Sep 2, 2010, 9:20 AM
Replies: 59
Views: 5,691
Posted By TCav
That results from your own private Circle of...

That results from your own private Circle of Confusion, and has nothing to do with the Depth of Field in the photograph.
Forum: General Discussion Sep 2, 2010, 9:09 AM
Replies: 59
Views: 5,691
Posted By TCav
Attached are four images. I just created them...

Attached are four images. I just created them with my Nikon D90 and my Nikon 85mm f/1.8 lens. They were recorded in Large Fine JPEG files. They are:

f/4.0, reduced for posting here.
100% crop...
Forum: General Discussion Sep 2, 2010, 7:35 AM
Replies: 59
Views: 5,691
Posted By TCav
The Circle of Confusion is for predicting how an...

The Circle of Confusion is for predicting how an image will be perceived. The Depth of Field is carved in stone once you press the shutter button. As we've seen here before, the DoF can be made...
Forum: General Discussion Sep 1, 2010, 1:48 PM
Replies: 59
Views: 5,691
Posted By TCav
Whoa! They're all trick questions! ...

Whoa!

They're all trick questions!

The Depth of Field is the measure of how far in front of, and how far behind the focus distance, objects will be in focus. Once you press the shutter...
Forum: General Discussion Sep 1, 2010, 5:29 AM
Replies: 59
Views: 5,691
Posted By TCav
Interesting. The concept of a "Circle of...

Interesting.

The concept of a "Circle of Confusion" pressumes a conventional viewing distance and a conventional visual accuity. Just because someone isn't conventional, doesn't mean the image...
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