Gene51 wrote:
Hyperfocal distance is the distance from the camera's focal plane to the subject that gives the maximum depth of field for the given focal length and aperture. The depth of field of "acceptable" focus is half the hyperfocal distance to infinity. If the hyperfocal distance is 20 ft, then everything from 10 ft to infinity is in focus.
http://photographylife.com/hyperfocal-distance-explained
From that link:
"To use a hyperfocal distance chart, follow the steps below:
1. Choose a lens, and be sure to note the focal length that you are using.
2. Pick an aperture value.
3. Find the hyperfocal distance that corresponds to your chosen focal length and aperture.
4. Focus your lens at the hyperfocal distance. This can be done by estimation, or by the focusing scale on your lens (if you have one).
5. Now, everything from half that distance until infinity will be sharp."
http://www.cambridgeincolour.com/tutorials/hyperfocal-distance.htm
A couple of caveats - using the HD provides "acceptable" focus at the near and far points. Acceptable is far from ideal, and everyone's tolerance of image softness is a little different. It is hardly a substitute for focusing on either foreground or background in some situations. When I need clear crisp focus on far AND near items in an image, I will focus stack.
http://www.ucphoto.me/b/when-hyperfocal-distance-fails/
http://www.ucphoto.me/b/when-hyperfocal-distance-fails-part-2/
http://www.ucphoto.me/b/when-hyperfocal-distance-fails-part-3/
http://www.davemorrowphotography.com/2010/05/focus-stacking-video-tutorial-landscape-photography.html
http://iso.500px.com/tutorial-focus-stacking-for-landscape-photography/
I am not sure how you can establish selective focus using hyperfocal distance, which determines MAXIMUM depth of field. You need to use a depth of field chart or calculator and large aperture/long focal length/short distances to do selective focus. Hyperfocal distance does not enter the equation here.
And your last statement about point and shoot and serious photographers is wrong on many levels, but here is one example of a world-renowned, quite serious photographer who uses point and shoot cameras exclusively:
http://theculturetrip.com/asia/japan/articles/daido-moriyama-the-father-of-street-photography-in-japan/
And here is a lesser known, but also highly regarded Chicago photographer:
http://iso.500px.com/meet-the-pro-photographer-who-uses-a-simple-point-shoot/
And here are some examples of images recorded with point and shoot gear:
http://blog.mingthein.com/2012/04/12/professional-photography-with-compact-cameras/
Do you want to reconsider your thoughts on all of this?
You're understanding is a misunderstanding.
Hyperfocal distance is the distance from the camer... (
show quote)
You are absolutely correct in that it is 1/2 rather than 1/3 the distance from the hyperfocal distance to the camera. My bad, I do know better.
Also, thanks for the links. They are excellent articles and explanations of how and why to use the hyperfocal distance. Would have used them had they been available when I was teaching.
I did not coin the phrase "acceptable focus". Its been in use for a long time and is repeatedly mentioned in the links you supplied. Of course acceptable is not ideal. I never stated that. It is acceptable.
To me that means most observers looking at a print will accept it as being in focus. I would also venture that most of the time the "center of interest" is not at either the near or far points, but somewhere in
between, which would bring it closer to ideal focus, thus helping to direct the observer to the "center of interest". If someone is going to put a loupe on it I don't even want to go there.
My reason for even getting into these discussions is to try and help someone to get the results they visualize when taking a photograph. If one doesn't have a working knowledge of laws of optics, then its usually going to be hit and miss.
Its one of many tools available to photographers. If one does not want to use it that's fine with me.
Incidentally, isn't the hyperfocal distance formula used in deriving the depth of field charts. My point regarding your comment about selective focus was that by using the hyperfocal distance formula one can determine where the near
and far points are and then make adjustments to the aperture setting or refocus or both, thus achieving selective focusing. Does this answer your question on how to obtain selective focus by using the hyperfocal distance formula?
Point and shoot. This really hit a raw nerve, didn't mean to do that, just MHO. I did go over to the links you recommended and saw some very artistic photos. Most of the photographers have a very visual artistic eye, probably better than I have.
In my time (a long time ago) we called them "grab" shots" (point and shoot). As I said, it has its place. But in my opinion, if one is going to rise to the next level or hopefully to the top in the field of photography something more is needed.
And that is all the technical factors, all those boring things such as correct exposure, lighting ratios, hyperfocal distance, contrast control, etc, etc, etc. This is what the Masters of Photography understood/understand and practiced.
My understanding had a mistake, not a misunderstanding. Do I want to reconsider my thoughts on all of this? Except where noted, a big fat NO.