Depth-of-Field Calculator

Here you have a universal depth-of-field calculator and a learning tool for your photography. The two rows allow you to make immediate comparisons between lenses and formats, and to see how focal length, focusing distance, circle of confusion, hyperfocal distance and subject magnification relate to depth of field. You may also be interested in my Field of View Calculator and Shutter Speed Calculator.

Feet	Meters	Dudak's Depth-of-Field Calculator
ROW 1 - 35mm/FX (CoC .025)  APS-C/DX (CoC .017)   Custom CoC ROW 2 - 35mm/FX (CoC .025)  APS-C/DX (CoC .017)   Custom CoC
Focal Length (mm)	Lens f/stop	Focus Distance	Near Depth	Far Depth	Total Depth	Hyperfocal Distance	Subject Mag.
Enter Lens, f/stop, Focus Distance					Enter Lens, Near Depth, Far Depth

Circle of Confusion Calculator
Enter Film or Sensor Short Side Dimension (mm)		Example: For 35mm film, the short side dimension is 24			Standard CoC	Critical CoC

	Film Format Dimensions
Format	35	645	6x6	6x7	6x9	4x5	8x10
Short x Long (mm)	24x36	41.5x56	56x56	56x69.5	56x84	96x120	200x250

	Some Digital SLR Dimensions
Format	Nikon APS-C	Canon APS-H	Canon APS-C	Fuji APS-C	Sony APS-C	Sigma Foveon	Pentax APS-C	Olympus 4/3
Short x Long (mm)	15.8x23.6 15.6x23.7	18.7x28.1	14.8x22.2 15x22.5	15.5x23	15.7x23.5	13.8x20.7	15.7x23.5 15.6x23.4	13x17.3

	Compact Digital Dimensions
Format	1/3.6"	1/3.2"	1/3"	1/2.7"	1/2.5"	1/2"	1/1.8"	1/1.7"	2/3"	1"
Short x Long (mm)	3x4	3.42x4.54	3.6x4.8	4.04x5.37	4.29x5.76	4.8x6.4	5.32x7.18	5.7x7.6	6.6x8.8	9.6x12.8
	from Wikipedia "Image Sensor Format" article

	Decimal/Inch Conversion for Feet Calculations
Decimal	.083	.167	.25	.333	.417	.5	.583	.667	.75	.833	.917
Inch	1	2	3	4	5	6	7	8	9	10	11

	f/stop Chart
Full	1	1.4	2	2.8	4	5.6	8	11	16	22	32	45	64
Third	1.12	1.58	2.25	3.18	4.49	6.36	8.99	12.71	17.98	25.43	35.95	50.84	71.91
Half	1.19	1.68	2.38	3.37	4.76	6.73	9.51	13.45	19.03	26.91	38.05	53.81	76.11
Third	1.26	1.77	2.52	3.56	5.03	7.12	10.07	14.23	20.14	28.48	40.27	56.95	80.55
Full	1.41	2	2.83	4	5.66	8	11.31	16	22.63	32	45.25	64	90.51
	bottom row shows true f/stop numbers for f/stop at top of next column

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