Hyperfocal table pocket
All of a camera lens has a focal length is a trait that gets to have targeted everything from half that distance to infinity. Is called hyperfocal distance and is the minimum distance that you can focus on maintaining infinity focus.
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, simplify the size of the sensor.
UPDATE: If you want to delve into the concept and calculation of the circle of confusion refers to Article Circle of Confusion. Fundamentals.
Meet the hyperfocal distance in each situation is of particular interest in landscape photography , when we try to obtain the maximum sharpness at all levels of the scene. For this set on the camera aperture close enough to increase the depth of field and focus to the hyperfocal to make this depth of field extends as far as possible. If enfocásemos further from the hyperfocal, we would lose 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 depth of field scale, with which he was immediately using the hyperfocal without any complications. Today, with most of optics without the scale, it requires using some other method. hyperfocal Solutions 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 these methods too cumbersome when taking a photo. Personally I prefer the simple tables, but that if, tailored to the goals I have in the bag.
To get a custom table I made an Excel which is responsible for making the calculations automatically. Generates two tables: one for full format (35 mm) and one for APS-C. Taking up 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 occupy as a credit card, simply print, fold and carry laminating. Then I can make a hole in the trademark for it hangs with a cord.
I expected the calculation of all integers from f1.4 aperture to f45. Intermediate diaphragms can be approximated, if any including the table would be too big and lose comfort.
As I say is tailored to my goals, with the focus that these are screen printed. Who does not match just change the values of focal lengths in the first table to recalculate everything. There is space for 16 values that spanned from 10 to 300 mm.
You can download the spreadsheet here: Table Hyperfocal Excel.
UPDATED 01/23/2009!
He retired 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 Chart
For better understanding I recommend reading the three articles of this series.
Thanks for the table.
Thanks for the table, I saw your work and is very interesting.
Greetings.
very useful util ...
Good job.
Could not change the diaphragm?. I do not understand why leaves change blade focal length and yet not allowed to change the aperture. Thanks
The reason is that depending on what goals you have, you have one or the other focal length setting, but have the goals you have, the diaphragms are always the same.
Are all diaphragms integers between 1.4 and 45, which is a wide enough range to cover from 50 light up long telephoto end (not someone shoot af/45, really) to intermediate (halves or thirds depending the camera or lens) is simply average. The error will be smaller than the estimate made by the circle of confusion which I explain in more items to estimate the distance on the scale of the target.
Only you aware that there is no link to the table, or I do not find it.
Greetings and thanks for your work
Indeed, Tossut. At the end of the article, there is a gray droves, with the title flashing, where I say that the new version of the table is in a later article and broader
With your permission, I put on my blog
http://todo-fotografia.blogspot.com/
Oops, sorry for not answer you earlier. I had to moderate filtered as spam. Of course, you can link it to your blog.
I understand that the result gives the table is from the middle from which appears infinitely crisp example. with a 50mm and a canon 50 d whose sensor is a circle of confusion, 18 and an aperture of 11, would be 13 meters and the sharpness would begin from 6.5 meters to infinity right?
thanks
The table gives the value of the hyperfocal. And, indeed, be sharp from half the value you read in the table, into infinity.
Hi Oscar, Josu tells you that with 50 mm. and f11, the hyperfocal distance is 13 meters and on your table I see that puts 9.1 meters. Josu Is the calculation wrong?
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