aleone63 Loc: Some place in Wisconsin

Hello Hedgehogs. Our challeng for today is Depth of Field.
Depth of field refers to the range of distance that appears acceptably sharp. It varies depending on camera type, aperture and focusing distance, although print size and viewing distance can also influence our perception of depth of field. The depth of field does not abruptly change from sharp to unsharp, but instead occurs as a gradual transition. In fact, everything immediately in front of or in back of the focusing distance begins to lose sharpness — even if this is not perceived by our eyes or by the resolution of the camera. DOF is primarily controlled by aperture size though other factors come into play such as the focal length of the lens and the distance the background is from the subject.

Photographers may consciously control depth of field for artistic purposes, aiming to achieve attractive background blur known as bokeh. For example, a shallow depth of field is often used when taking close up shots so the background is blurred and the main subject is in sharp focus.
Deep depth of field means that all or most of the picture is in focus from front to back. It is often used for capturing subjects in the distance, such as in landscape scenes.
The further away your camera is from the subject, the greater the depth of field.
Higher f-stop numbers obtained by using smaller apertures produce deep depth of field. Short focal lengths, such as when a lens is set at wide angle, help increase depth of field.
Less depth of field (shallow) means that a subject is in focus but objects in front and behind it appear out of focus. Less DOF is often desired when taking portrait, close-up and macro shots.
Lower f-stops (larger apertures) decrease DOF. Long focal lengths (zooming in) produce less DOF.
You can also make the background appear out of focus by placing the subject close to the camera and having the background far away.

I have first posted a chart as an example for a better understanding.

also here is a link to a Depth of Field calculator.
http://www.dofmaster.com/dofjs.html

Happy snapping! :thumbup:

happy listening http://youtu.be/vqjGEb4QtYg

Example from online Remember the smaller the number the larger the opening of your lens.


F/4.5, focal length 37mm


F/5.8, focal length 150mm


F/5, focal length 59mm


F/6.3, focal length 22mm


F/4, 15mm

aleone63 Loc: Some place in Wisconsin

Please be patient with my comments today. I have to go to the hospital for some test they are not sure if my gallbladder is functioning properly or it is a kidney issue. I promise I will do my best to comment on your post.

Sher Loc: Colorful Colorado

Very good examples Annette... All have interesting dof... I love that song...

Sher Loc: Colorful Colorado

Hope everything goes well for you tomorrow.... I have volleyball in the am, but will help with comments when I can. I will be thinking about you...

Janice Loc: Kentucky

I hope it is the lesser of the two. I hope you feel better soon too. Great start and awesome song! Gonna go get Pink's new cd tomorrow - Sher did you get yours? I am so excited, have heard some of the new songs and it seems like it is going to be a good CD.
I have to get DOF pics tomorrow and some for shiny stuff too if it isn't raining again.

modest genius Loc: joshua tree park CA

Excellent subject. Looking for suitable made me realise how rarely I make full use of this feature....... Thanx. Back to square one......Again!

HMS Victory f6.5


Dandelion f3.5


Irish Bookies f5.6


Lavender bee f4.5


bubble gum f4.5

aleone63 Loc: Some place in Wisconsin

Thanks Sher... kinda freaked when they mentioned a kidney problem... it is on the same side I had the lung sarcoma.

aleone63 Loc: Some place in Wisconsin

hope you are feeling better too... I love listening to the rain but it causes pain for me too.

aleone63 Loc: Some place in Wisconsin

pg 1
Excellent examples! I always like going back to remind me of situational awareness or compositional (is that a word) awareness. I like going on my as I call them 'field trips' amd when I see my shot take it and then look and see what is behind me.

aleone63 Loc: Some place in Wisconsin

Good luck! :thumbup:

aleone63 Loc: Some place in Wisconsin

I heard a few song too... I am sure you are right... sounds like a good one.

aleone63 Loc: Some place in Wisconsin

Try shooting in Apeture mode for this challenge... on my Canon apeture mode is AV.

suejay50 Loc: Devon, UK

Thinking of you - all the best....

suejay50 Loc: Devon, UK

DoF can really, in my view, enhance/change a photo by getting the eye to focus on what you want it to with shallow dof to getting the whole picture with a large dof. I went out with my mentor one day earlier this year and kept these to remind me to USE dof! I have since used it on the flowers!

Shallow dof - only fence in focus


Medium dof - getting more in focus


Large dof - everything visible


Climbing Rose


Looking down on a lupin

aleone63 Loc: Some place in Wisconsin

pg 1
Excellent examples sue :thumbup: