Monday, December 08, 2008

DSC00393: Tree Lights 1.0

DSC00393: Tree Lights 1.0, originally uploaded by RMStringer.

All were taken from my bedroom looking through the window with a screen on it. You can see the light reflected on the window.

Exposure: 0.077 sec (1/13)
Aperture: f/4.5
Focal Length: 150 mm
ISO Speed: 800

DSC00387: Tree Lights 1.1

DSC00387: Tree Lights 1.1, originally uploaded by RMStringer.

All were taken from my bedroom looking through the window with a screen on it. The screen gives the light an almost grid pattern to its twinkle.

Exposure: 0.333 sec (1/3)
Aperture: f/5.6
Focal Length: 300 mm
ISO Speed: 400

Sunday, December 07, 2008

Depth of Field Calculator

Found on the DOFMaster Website

Depth of Field Calculator

Camera, film format, or circle of confusion

Focal length (mm)
Selected f-stop
Subject distance

Subject distance	10 ft

Depth of field
Near limit	7.6 ft
Far limit	14.6 ft
Total	7.04 ft

In front of subject	2.4 ft (34%)
Behind subject	4.63 ft (66%)

Hyperfocal distance	31.2 ft
Circle of confusion	0.02 mm

Use the actual focal length of the lens for depth of field calculations. The calculator will automatically adjust for any "focal length multiplier" or "field of view crop" for the selected camera.

Focal lengths of digital camera lenses are listed here.

Focus at the subject distance, 10 ft

	7.04 ft
7.6 ft		14.6 ft

	Focus at the hyperfocal distance, 31.2 ft

	Depth of field extends from 15.6 ft to infinity

Depth of Field Definition

Hyperfocal, near, and far distances are calculated using these equations.

Circles of confusion for digital cameras are listed here.

Depth of Field: The zone, or range of distances, within a scene that will record as sharp ... It is one of the most creative and profound effects available to photographers.

Using Your Digital Camera, George Schaub, 2003

Image clarity or sharpness is not just a matter of focusing a lens on the subject. There is an area in front of and behind the sharp focus plane that is also sharp or clear, and the extent of this area changes, depending on the focal length of the lens, the focusing distance, and the aperture used. This three-dimensional area of sharp focus is called depth of field.

Lonely Planet Landscape Photography: A Guide to Taking Better Pictures, Peter Eastway, 2005.

Hyperfocal Distance Definition

... the hyperfocal distance setting ... is simply a fancy term that means the distance setting at any aperture that produces the greatest depth of field.

How to Use Your Camera, New York Institute of Photography, 2000.

When the lens is focused on the hyperfocal distance, the depth of field extends from half the hyperfocal distance to infinity.

Photography, Phil Davis, 1972.

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DSC00266: Christmas Tree 1.1

DSC00266: Christmas Tree 1.1, originally uploaded by RMStringer.

This was just a fun photo to take. I set the ISO to 3200 and took the photo. It only took a 6 second exposure to get this look by using such a high ISO speed. To me, this combination of settings gives the photo a very old look.

Exposure: 6 sec (6)
Aperture: f/32
Focal Length: 105 mm
ISO Speed: 3200

Friday, December 05, 2008

DSC00303: Christmas Tree 1.7

DSC00303: Christmas Tree 1.7, originally uploaded by RMStringer.

Taken with the Kit lens 18-70mm on a tripod in BULB Mode.

I love how in the B/W photo you can see all of the shadows and light patterns that are on the wall behind the tree. I looks to me like an old photo where the wall has been discolored by the passage of time. The lights on the tree look like little lightening bugs that are living in the tree.

Exposure: 1 sec (1)
Aperture: f/5.6
Focal Length: 40 mm
ISO Speed: 100