A small application for amateur photographers to compute the depth of field values of your photographs.
Choose your camera type and unit of measure in settings window.
Just set the wheels for focal length, aperture and focus distance in calculator window and program will calculate depth of field and closest/furthest distances of acceptable sharpness.
Very easy to use! You can use this application with almost any camera as a lot of crop factors are supported.
A useful tool especially for people who prefer to shoot with manual focus lenses.

Focal length

In most photography, where the subject is essentially infinitely far away, longer focal length (lower optical power) leads to higher magnification and a narrower angle of view; conversely, shorter focal length or higher optical power is associated with a wider angle of view.
Camera lens focal lengths are usually specified in millimetres (mm).
Due to the popularity of the 35 mm standard, camera–lens combinations are often described in terms of their 35 mm equivalent focal length, that is, the focal length of a lens that would have the same angle of view, or field of view, if used on a full-frame 35 mm camera.
Use of a 35 mm-equivalent focal length is particularly common with digital cameras, which often use sensors smaller than 35 mm film, and so require correspondingly shorter focal lengths to achieve a given angle of view, by a factor known as the crop factor.

Aperture (F-number)

In optics, the f-number (sometimes called focal ratio, f-ratio, f-stop, or relative aperture[1]) of an optical system is the ratio of the lens’s focal length to the diameter of the entrance pupil.

Camera & Crop factor

In digital photography, a crop factor is related to the ratio of the dimensions of a camera’s digital sensor compared to 35 mm film format as a reference.
This ratio is also commonly referred to as a focal length multiplier (\”FLM\”) since multiplying a lens focal length by the crop factor or FLM gives the focal length of a lens that would yield the same field of view if used on the reference format.
Most DSLRs on the market have nominally APS-C-sized image sensors, smaller than the standard 36 × 24 mm (35 mm) film frame.
For example, many Canon DSLRs use an APS-C sensor that measures 22.2 mm × 14.8 mm.
The result is that the image sensor captures image data from a smaller area than a 35 mm film SLR camera would, effectively cropping out the corners and sides that would be captured by the 36 mm × 24 mm ‘full-size’ film frame.
Because of this crop, the effective field of view (FOV) is reduced by a factor proportional to the ratio between the smaller sensor size and the 35 mm film format (reference) size.
For most DSLR cameras, this factor is 1.3–2.0×. For example, a 28 mm lens delivers a moderately wide-angle FOV on a 35 mm format full-frame camera, but on a camera with a 1.6 crop factor, an image made with the same lens will have the same field of view that a full-frame camera would make with a ~45 mm lens (28 × 1.6 = 44.8).
This narrowing of the FOV is a disadvantage to photographers when a wide FOV is desired. Ultra-wide lens designs become merely wide; wide-angle lenses become ‘normal’.
However, the crop factor can be an advantage to photographers when a narrow FOV is desired. It allows photographers with long-focal-length lenses to fill the frame more easily when the subject is far away.
A 300 mm lens on a camera with a 1.6 crop factor delivers images with the same FOV that a 35 mm film format camera would require a 480 mm long focus lens to capture.
Using an FLM of 1.5, for example, a photographer might say that a 50 mm lens on his DSLR \”acts like\” its focal length has been multiplied by 1.5, by which he means that it has the same field of view as a 75 mm lens on the film camera that he is more familiar with.
Of course, the actual focal length of a photographic lens is fixed by its optical construction, and does not change with the format of the sensor that is put behind it.

Full frame cameras:

Canon  1DS, 1Ds Mark II, 1Ds Mark III,5D,5D Mark II
Leica  M9
Nikon  D3, D3x, D3s, D700
Sony  Alpha DSLR-A850, Alpha DSLR-A900\n

1.3x DSLR:

Canon  1D, 1D Mark II, 1D Mark III, 1D Mark IV
Kodak  DCS-760
Leica  M8, M8.2, X1\n

1.5x DSLR:

Fujifilm  FinePix IS Pro, FinePix S1 Pro, FinePix S2 Pro, FinePix S3 Pro, FinePix S5 Pro, FinePix X100
Nikon  D1H,D1X,D2H,D2Hs,D2X,D2Xs,D40,D40x,D50,D60,D70,D70s,D80,D90,D100,D200,D300,D300S,D3000,D3100,D5000,D7000
Pentax  K-r,K-x,K-5,K7,K10D,K20D,K100D,K110D,K200D,K2000
Samsung  GX-1L,GX-1S,GX-10,GX-20,NX5,NX10,NX100
Sony  Alpha DSLR-A100, Alpha DSLR-A200, Alpha DSLR-A230, Alpha DSLR-A300, Alpha DSLR-A330, Alpha DSLR-A350, Alpha DSLR-A380, Alpha DSLR-A450, Alpha DSLR-A500, Alpha DSLR-A550, Alpha DSLR-A700, NEX-3, NEX-5

1.6x DSLR:

Canon  7D, 10D, 20D, 30D, 40D, 50D,60D,D30,D60,Digital Rebel/300D,Digital Rebel T1i/500D,Digital Rebel T2i/550D,Digital Rebel XS/1000D,Digital Rebel XT/350D,Digital Rebel XTi/400D, Digital Rebel XSi/450D
Sigma  DP1,DP1s,DP1x,DP2,DP2s,SD-9,SD-10,SD-14,SD-15\n

2x DSLR:

Olympus  E-1,E-3,E-5,E-30,E-300,E-330,E-400,E-410,E-420,E-450,E-500,E-510,E-520,E-600,E-620,E-P1,E-P2,E-PL1,E-PL1s
Panasonic  Lumix DMC-G1,Lumix DMC-G2,Lumix DMC-G10,Lumix DMC-GF1,Lumix DMC-GF2,Lumix DMC-GH1,Lumix DMC-GH2,Lumix DMC-L1,Lumix DMC-L10

compact 1/1:

Canon  PowerShot G10,PowerShot G11,PowerShot G12
Leica  D-Lux 2,D-Lux 3
Panasonic  Lumix DMC-LX1,Lumix DMC-LX2

compact 2/3:

Olympus  C-2500L, C-8080
Konica Minolta  Dimage 7,Dimage 7i,Dimage 7Hi,Dimage A1,Dimage A2,Dimage A200
Nikon  Coolpix 5000,Coolpix 5700,Coolpix 8400,Coolpix 8700,Coolpix 8800
Panasonic  Lumix DMC-LC1

compact 1/2:

Canon  PowerShot Axx, Axxx, Gx, Sx, Sxx , SDxx, SDxxx, SXx, SXxx series
Casio  Exilim EX-xxxx series
Fujifilm  FinePix Axxx, Fxxx, JXxxx, Sxxx series
Hewlett Packard  PhotoSmart xxx series
Nikon  Coolpix series
Olympus C-xxxx, D-xxx, FE-xx, FE-xxxx, SP-xxx, Stylus series
Panasonic  Lumix DMC-Fxx, DMC-Lxx, DMC-Txx, DMC-Zxx series
Sony  Cyber Shot DSC-xxx series

compact 1/3:

Canon  PowerShot A100,PowerShot A200,PowerShot A400,PowerShot A430,PowerShot A450,PowerShot A460
Olympus  D-370,D-380,D-390,D-520
Panasonic  Lumix DMC-FZ1,Lumix DMC-FZ3,Lumix DMC-LC20,Lumix DMC-TZ1,Lumix DMC-TZ2

Camera & Circle of confusion

Circle of confusion (“CoC”) is used to determine the depth of field, the part of an image that is acceptably sharp. A standard value of CoC is often associated with each image format, but the most appropriate value depends on visual acuity, viewing conditions, and the amount of enlargement.

  Camera           CoC
  ------------------------
  1.3x DSLR        0.02551
  1.5x DSLR        0.02107
  1.6x DSLR        0.02000
  2x DSLR          0.01600
  35mm             0.03200
  4x5              0.12029
  5x7              0.150  
  6x4.5            0.05547
  6x6              0.06276
  6x7              0.06819
  6x9              0.070  
  8x10             0.24058
  compact 1/1      0.00663
  compact 1/2      0.00592
  compact 1/3      0.00444
  compact 2/3      0.00814

Depth of field and hyperfocal distance equations

Hyperfocal Distance

The hyperfocal distance is the closest distance at which a lens can be focused while keeping objects at infinity acceptably sharp.
When the lens is focused at this distance, all objects at distances from half of the hyperfocal distance out to infinity will be acceptably sharp.
The hyperfocal distance is entirely dependent upon what level of sharpness is considered to be acceptable.
The criterion for the desired acceptable sharpness is specified through the circle of confusion (CoC) diameter limit.

Setting focus at the Hyperfocal Distance gives maximum depth of field from H/2 to infinity.

H = (L x L) / (f x d)

Where:
H = Hyperfocal Distance (in millimeters)
L = lens focal length (ie, 35mm, 105mm)
f = lens aperture f-stop
d = diameter of circle of least confusion (in millimeters)

Near Focus Limit

NF = (H x D) / (H + (D – L))

Where:
NF = Near Focus Limit (millimeters)
H = Hyperfocal Distance (in millimeters, from above equation.)
D = lens focus distance (in millimeters)
L = lens focal length (ie, 35mm, 105mm)

Far Focus Limit

FF = (H x D) / (H – (D – L))

Where:
FF = Far Focus Limit (millimeters)
H = Hyperfocal Distance (in millimeters, from above equation)
D = lens focus distance (in millimeters)
L = lens focal length (ie, 35mm, 105mm)