Hyperfocal table pocket
All of a camera lens has a focal length feature in which focus is achieved by having everything from half that distance to infinity. Is called hyperfocal distance and is the minimum distance that can be focused keeping in focus to infinity.
The hyperfocal distance depends on several factors among which are the lens focal length, aperture and sensor size. Actually not exactly the size of the sensor which influences, but the so-called circle of confusion which in turn depends on this, but for practical purposes, and not to enter formulas in detail, we will simplify the sensor size.
UPDATE: If you want to delve into the concept and calculation of the circle of confusion see the article Circle of Confusion. Fundamentals.
Meet the hyperfocal distance in each situation is of particular interest in landscape photography , where we aim for maximum clarity at all levels of the scene. This will adjust the aperture camera close enough to increase the depth of field and focus to the hyperfocal to make that extends depth of field as possible. If enfocásemos further from the hyperfocal, we would be losing focus area in the foreground, on the contrary if enfocásemos ahead, would be the background of the photo you will lose sharpness.
Formerly the objectives of reflex cameras had recorded the scale of depth of field, which was immediately use the hyperfocal without any complications. Today, with most optics without this scale is imposed using some other method. Solutions hyperfocal know there are many , such as rotary tables to bring in their own lens cap, large graphic and difficult to use outside a study , and calculators for PDAs or phones. However, I find all these methods too cumbersome when taking a photo. Personally I prefer the simpler tables but that if, tailored to the goals I have in the bag.
To get a custom table that I made an Excel handles make the calculations automatically. Generates two tables: one for full-format (35 mm) and one for APS-C. Taking over both, it is also possible to calculate the distance to APS-H no more than the average of both tables for the same box.
Is sized to fill as a credit card, simply print, fold and carry laminating. Then I can make a hole in the brand to take hanging with a cord.
I expected the calculation of all integers from f1.4 aperture to f45. Intermediate diaphragms may be approximated, if any including the table would be large and lose comfort.
As I say is tailored to my goals, with the focus that these are screen printed. Who does not match simply change the values of the focal lengths in the first table to recalculate everything. There is room for 16 values that ranged from 10 to 300 mm.
You can download the spreadsheet here: hyperfocal Table Excel.
UPDATED on 23-01-2009!
I removed the first version of the table. You can download version 2.1 of the table on the following entry:
Circle of confusion. Considerations in digital photography and hyperfocal table
For better understanding I recommend reading the three articles of this series.
Thanks to the table.
Thanks for the table, I have seen your work and is very interesting.
Greetings.
very useful useful ...
Good job.
Do not change the diaphragms could be?. I do not understand why the blade leaves change the focal length and yet not allowed to change the diaphragms. Thanks
The reason is that depending on what goals you have, you will have some or other focal logitudes, but the goals you have, the diaphragms are always the same.
Are all the diaphragms integers between 1.4 and 45, which is a wide enough range to cover from 50 bright telephoto end up a lot (not trigger someone af/45, really) to intermediate (halves or thirds depending camera or lens) simply averaged. The error will be smaller than the one introduced by the estimation of the circle of confusion in articles that explain more the estimation of the distance on the scale of the target.
Only you aware that there is no link to the table, or I can not find it.
Greetings and thanks for your work
Indeed, Tossut. At the end of the article, there is a gray recuado with the title flashing, where I say that the new version of the table is in a later article and wider
With your permission, I put on my blog
http://todo-fotografia.blogspot.com/
Oops, sorry for not answer you before. I had to moderate filtered as spam. Of course you can link it to your blog.
I understand that the result given in the table, is from the middle from where it appears to infinity crisp example. with a 50mm canon 50 d and a sensor which is a circle of confusion, 18 and a diaphragm of 11, would be 13 meters and would begin sharpness from 6.5 meters to infinity right?
thanks
The table gives the value of the hyperfocal. And, indeed, will be sharp from half the value that you read in the table, into infinity.
Hello Oscar, Joshua tells you that with 50 mm. and f11, the hyperfocal are 13 meters on your board and see which places 9.1 meters. Is it wrong to calculate Joshua?
No Alberto. Both values are correct. It all depends on what value you choose for the circle of confusion. This explained in the posts about the Circle of Confusion