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Elaine Mueller Tweedy
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Depth of Field Can Make or Break a Photo

2/2/2018

14 Comments

 
This week I am using my Nikon D800 camera, a 50mm 1.4 lens, a somewhat cooperative dog, and one example to point out how depth of field is not just a camera setting, but a consideration in the overall look and feel of a photograph.

Depth of field (DoF) is dependent upon your aperture setting and your proximity to the subject (how close or far you are from what you are photographing).  The lower your aperture setting, the wider the opening in your camera, the more shallow your depth of field will be. But, we also have to factor in proximity to subject.  The closer you stand to your subject, and the wider open (lower the number) your aperture is, the more blur you will have around everything but your focal point.

To illustrate, I placed my camera on a tripod and placed it three feet away from my subject.  My volunteer this week was Burton.  Well, to be perfectly honest, he did not raise his paw to volunteer, so I picked him.  I placed him on a bench with a cover and waited for him to settle.  I focused on the area just between his nose and his eyes on the bridge of his nose.  The first photo, below, has the aperture set at 1.4 (the widest it can go), ISO 100, speed is 1/125.
Picture
You can see that the image is very soft and blurred all around Burton, but his nose, the whiskers just below the nose, and a bit of the bridge of his nose are in focus.  The depth of field is TOO SHALLOW to capture Burton's entire face in focus.

Leaving the camera in the exact same location, with the focus point still on the bridge of the nose between the nose and eyes, and Burton still quietly laying on the bench, I reset the camera's aperture to 4 (narrows the opening), left the speed at 1/125, and raised the ISO to 400.  Here is the result.
Picture
This time the depth of field allows for Burton's entire face to be in focus, yet still gives me the blur I am seeking for the rest of his body and backdrop. 

If I wanted more of his body in focus, I could change the camera settings again, or I could change the distance between Burton and I, moving farther back, to gain additional areas of focus.  Understanding the depth of field capabilities of your lenses is an important factor in planning and setting up your photography work.

A little bit of Burton trivia.  He will be nine years old this year and has been deaf since birth.  He is very vocal and actually sings for his supper.  He was rescued by Another Chance for English Setters and we adopted him at the age of 4 months in 2009.  He knows countless hand signals, and reads our body language better than a body language specialist.  He loves to play with tennis and chuck-it balls and can leap a good 5 feet in the air to recover a ball on a bounce.  He has one lovely blue eye and a bit of blue at the bottom of his light brown eye.  I think his ears look like lamb ears.

For more depth of field photos and more discussion, check out this week's blog circle.  Start here with Mikahla Dorey of Brackson Photography, Pet & Equine Photographer in Nova Scotia, Canada.
14 Comments
Lisa Browning
2/2/2018 07:53:42 am

Great photos of the very handsome Burton!

Reply
Kim Hollis link
2/2/2018 09:52:17 am

I'm trying to break the f/2.8 habit so I am getting more than just the eyes or the nose in focus!

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Ursula link
2/2/2018 09:57:55 am

Burton is so precious. Dogs are the best psychologists, profilers, and judges of character. Nice explanation.

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Rochelle
2/2/2018 11:18:59 am

I Love how you say somewhat co operative lol!
Burton is just gorgeous. Like Kim, most of the time Im at 2.8 tooo! Something to bare in mind

Reply
Cahlean link
2/2/2018 11:21:13 am

Burton is adorable! The texture on the background makes it a little hard to see the difference in depth of field (makes the entire image look more in focus) but looking at his face gives a good idea of how it gets deeper from f2.8 to f4

Reply
Elaine
2/2/2018 01:43:35 pm

That was my intent. :)

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Kelly
2/2/2018 11:22:59 am

Definitely agree with you that the second image is more pleasing. Beautiful.

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Linda Perdue link
2/2/2018 02:57:41 pm

Beautiful dog Burton is! Nice photos showing a bit of change in the dof

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Kelly Middlebrooks
2/2/2018 04:22:53 pm

I have shot wide open for so long that it's hard for me to remember that it's not always the most perfect aperture. Dash's nose is so far away from his eyes that I miss a lot of images because of this very thing. Oh, if I could only remember everything every time I pick up the camera.

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Darlene link
2/2/2018 04:42:38 pm

I had to laugh... i used "cooperative", too! :) Burton is gorgeous and he looks great with that gray/blue background color. Love the 2nd image - beautiful!

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Danyel Rogers
2/2/2018 06:28:03 pm

Great way to show how DoF can actually be TOO shallow.

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Lynda
2/2/2018 08:29:31 pm

Burton is stunning. Those eyes!! Great photos and explanation.

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Nancy link
2/2/2018 10:49:46 pm

Burton is beautiful! and I do think his ears look like lambs ears

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Tracy Allard link
2/5/2018 07:15:43 am

Burton is so handsome, and I love deaf dogs - I've had a number of them in my obedience classes over the years and they've always done so well - mostly (I believe) because their owners are very dedicated to them.

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