Enhancing depth of focus
Nov 3, 2017 06:33:02 #
One of my cameras is a Canon SX50... We are all use to HDR exposure bracketing... but in addition, this magic camera does focus bracketing... Certainly not the same as using a rail . I have not yet tried it.
"The feature you are looking for is Focus Bracketing, not Focus Stacking. Focus Bracketing takes several images (from 3 to 9 images, typically, depending on the camera) with a slight variation in focus. You must then pick the one which is focused where you intended. Focus Stacking takes a number of shots with different focus distances like Focus Bracketing but produces a single image which combines the in-focus parts of each underlying shot. This creates an image with a greater depth-of-field. With Focus Bracketing, you can use a computer software to do Focus Stacking but not vice-versa."
https://photo.stackexchange.com/questions/86104/focus-stacking-with-a-canon
"The feature you are looking for is Focus Bracketing, not Focus Stacking. Focus Bracketing takes several images (from 3 to 9 images, typically, depending on the camera) with a slight variation in focus. You must then pick the one which is focused where you intended. Focus Stacking takes a number of shots with different focus distances like Focus Bracketing but produces a single image which combines the in-focus parts of each underlying shot. This creates an image with a greater depth-of-field. With Focus Bracketing, you can use a computer software to do Focus Stacking but not vice-versa."
https://photo.stackexchange.com/questions/86104/focus-stacking-with-a-canon
Nov 3, 2017 07:02:57 #
Did you really mean depth of focus? Or, were you wanting to discuss depth of field in closeups? They are two distinctly different principles.
--Bob
--Bob
MalcolmZ wrote:
When taking macrophotos, sometimes manipulation of f-stop does not produce sufficient depth of focus. What are some ways (preferably easy and inexpensive) to improve this aspect of photography in close ups of model dioramas? I have heard of something called "stacking".
Nov 3, 2017 07:03:08 #
[quote= "in close ups of model dioramas? ".[/quote] Here your best bet is the "Scheimpflug principle" which with a legacy wide angle lens and tilting adapter can be accomplished with a DSLR. Check Wikipedia for a simple explanation. Fun project. Coupled with stacking would enhance your result.
Nov 3, 2017 07:21:54 #
If you are using a "close focus" lens (as opposed to a true MACRO) with a moderate to long zoom, try just stepping back from the subject, then zoom back to the original perspective. This should give you a little more depth of field at the same f stop. Back away from the subject and your flash might be more useful too. Finally, moving back and using the zoom could reduce distortion. Worth a try, and costs nothing, unlike a number of posts.
Nov 3, 2017 07:41:40 #
Nov 3, 2017 07:54:57 #
billnikon
Loc: Pennsylvania/Ohio/Florida/Maui/Oregon/Vermont
MalcolmZ wrote:
When taking macrophotos, sometimes manipulation of f-stop does not produce sufficient depth of focus. What are some ways (preferably easy and inexpensive) to improve this aspect of photography in close ups of model dioramas? I have heard of something called "stacking".
The Nikon D850 is supposed to have focus stacking built in. Has anyone with a D850 tried this yet? Does it work?
Nov 3, 2017 08:02:44 #
Robert Bailey
Loc: Canada
Thanks, Jerry- you so often provide an abundance of useful links.
You are like "the missing link" embodied!
You are like "the missing link" embodied!
Nov 3, 2017 08:45:11 #
RWR
Loc: La Mesa, CA
wteffey wrote:
If you are using a "close focus" lens (as opposed to a true MACRO) with a moderate to long zoom, try just stepping back from the subject, then zoom back to the original perspective. This should give you a little more depth of field at the same f stop.
As soon as you step back, the original perspective is changed. The best that can be done by stepping back and zooming in is to regain the original field of view, or reproduction ratio, in which case the depth of field at a given aperture will be the same, regardless of the focal length.
Nov 3, 2017 08:45:12 #
cthahn wrote:
Taaaaaaaaaaaaaa Daaaaaaaaaaaaa? Sounds very professional. Like a 3 year old,
How helpful of you to the thread. I am sure we all appreciate it.
Dennis
Nov 3, 2017 09:20:14 #
cthahn wrote:
Taaaaaaaaaaaaaa Daaaaaaaaaaaaa? Sounds very professional. Like a 3 year old,
And your unending negative, rude and uniformly worthless posts sound like those of an angry and mean old man. Is there no end to this dross?
Nov 3, 2017 12:02:50 #
Pablo8 wrote:
Depth of Field, is the amount of the subject matter that is in acceptable focus. Depth of Focus is the range of focus in front of, and behind the Film / or Sensor receptive surface. The two terms are all too often, mixed up by people. But they are different things. Please raise your hand if you cannot grasp the difference.
IMHO, it's a debate without a difference. The two terms refer to the same resulting characteristics of cameras and lenses.
If a non-photographer were watching you shoot a pimple on the head of a worm, with an explanation s/he might
understand the nature of your shot (or not) equally using either term. If a photographer were watching you make
the same shot, s/he would instantly know what you were up to using either term.. So you can separate the technical
meaning of these terms, but I wonder what difference it makes in real life? >Alan
Nov 3, 2017 12:14:55 #
aellman wrote:
IMHO, it's a debate without a difference. The two terms refer to the same resulting characteristics of cameras and lenses...>Alan
Nope, they are not. Completely different things - the terms are just often mistakenly used interchangeably.
Nov 3, 2017 12:22:02 #
My esteemed associate, Tri-X, replied with a sufficient response. If you wish to have it clarified, please ask. One of us will be happy to provide you with a reply.
--Bob
--Bob
aellman wrote:
IMHO, it's a debate without a difference. The two ... (show quote)
Nov 3, 2017 12:25:37 #
rmalarz wrote:
My esteemed associate, Tri-X, replied with a sufficient response. If you wish to have it clarified, please ask. One of us will be happy to provide you with a reply.
--Bob
--Bob
I am sure that you and your steamed associate could show me the error of my ways.
Nov 3, 2017 13:15:30 #
I'll be happy to, and that's esteemed.
Depth of Focus is a lens optics concept that measures the tolerance of placement of the image plane (the film plane in a camera) in relation to the lens. In a camera, depth of focus indicates the tolerance of the film's displacement within the camera, and is therefore sometimes referred to as "lens-to-film tolerance."
Depth of Field is the distance between the nearest and farthest objects in a scene that appear acceptably sharp in an image.
Think of it this way. Depth of Focus happens behind the lens. Depth of Field happens in front of the lens.
--Bob
Depth of Focus is a lens optics concept that measures the tolerance of placement of the image plane (the film plane in a camera) in relation to the lens. In a camera, depth of focus indicates the tolerance of the film's displacement within the camera, and is therefore sometimes referred to as "lens-to-film tolerance."
Depth of Field is the distance between the nearest and farthest objects in a scene that appear acceptably sharp in an image.
Think of it this way. Depth of Focus happens behind the lens. Depth of Field happens in front of the lens.
--Bob
aellman wrote:
I am sure that you and your steamed associate could show me the error of my ways.
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