DoF Table
Interactive table showing DoF across apertures and distances
How to use DoF Table
- 1Select the focal length and the radium you plan to use.
- 2Select the focus distance of the scene.
- 3Reads the cut-off, range and general depth of the table.
♪ How to read the view ♪
Using the same model as the depth of the progression; projected by focal/radio/distance.The view is very clear and allows for a focus to be planned prior to the outside, without a calculator.
Tables vary according to the size of the sensor, using a table matching the camera or setting a dispersive circle.
The view is a central tool for photographers before the auto-focus period -- the depth of the view on the camera allows you to know, without counting, that the f/8 focus 3 meters is clear from 2 meters to 6 meters. Although it is now available in real time,** the understanding is still of two practical value**: 1 in advance (when you know that the view is only 11 cm deep when f/1.4 is taken 3 m), you receive f/2.8 or focus more conservatively);2 weak light/caption does not have time to replay it.
**Practical depth reference for human photographs**: close-up (face only)f/1.4-f/2 is sufficient (deep 2-5 cm, one eye clear and the other slightly normal); half body f/2-f/2.8 (deep 10-20 cm, ensuring a clear face); full body f/4-f/5.6 (deep 30-80 cm); ** photo at least f/8** and focus on first row to keep the person as flat as possible. ** Remember: Distance affects more than the optic — back 2 metres more than the radiant 2 set. **
| Focus Distance | f/1.4 | f/2.0 | f/2.8 | f/4.0 |
|---|---|---|---|---|
| 1 m | About 1.2 cm | About 1.7 cm | About 2.4 cm | About 3.4 cm |
| 2 m | About 4.9 cm | About 7.0 cm | About 9.8 cm | About 14 cm |
| 3 m | About 11 cm | About 16 cm | About 22 cm | about 32 cm |
| 5 m | About 31 cm | about 44 cm | About 62 cm | About 87 cm |
| 10 m | Approximately 1.25 m | Around 1.77 m | About 2.5 m | About 3.5 m |
85mm human image expressed deep (full picture, CoC 0.03mm)
Frequently asked questions
Why the watch instead of the calculator?
The table is faster for common settings and suitable for pre-shoot planning.
Is it accurate?
It's as accurate as the bottom model, if it matches the size of the sensor.
How do you read it?
The close range is the clearest near end distance and the distance is the clearest long end distance.
How much radium should we use for a photo shoot?
At least f/8, extra hours f/11. Method of judgement: Estimating the distance difference between the front and last rows, and the table ensures that the view is deeper than this margin. ** When three rows of the photo taken, the view should cover at least 1 metre** (front to back row in depth), which corresponds to 50 mm lens f/8 and is sufficient for focus 5 m (about 2 m deep). The other three techniques are: 1 to get people closer together (reduced in depth); 2 to focus on the second row (if there is a sitting in the front row, there is a focus in the front row); 3 to take 2-3 different focus, synthesize or select the clearest. ** The best insurance is for everyone to try to be on the same plane (e.g. on the stairs). **
What about the depth ruler?
The old manual lens mirror has a deep ruler: The mid-scale is the focal distance, and the colour/digital mark of the left symmetry corresponds to the different radiums (e.g. the "8" mark of the symmetrical side). Usage: Rotation of the focal ring sets the focus distance at the middle line, and then reads the range of distance indicated by the two markers that you want to use, which is the depth. **Most of modern lenses removed this ruler (because of automatic focus), but a lot of photos App can be checked out, and the principles are the same. ** Understands that it helps to create an intuitive sense of "the radium-distance-deepness".