Maintain your old Siemens Hipath system

Hyperfocal Focusing: What Is It And Why Should You Use It?

When should you use hyperfocal focusing? Well, sometimes when shooting a landscape, you want everything sharp from the front to the back of the scene. Setting a small aperture such as f/16, f/22 or even f/32 can help, but if you really want to maximize depth of field, hyperfocal focusing is the technique you need to use.

To do this, you need a camera where you can switch to manual focusing and a lens inscribed with a depth of field scale (not all modern lenses have these markings, especially zoom lenses). If you're not familiar with these kinds of lens markings, here's a quick explanation:

Lens Markings Primer

A typical lens shows four sets of markings. At top (looking from behind the camera) is the distance scale (on the lens' focus barrel) showing figures in feet and meters (this also shows the infinity position).

Below that are a set of lines beneath which the f-stops of the lens are marked. This is the depth of field scale. For each f-stop, there are two equidistant marks, one to the left and one to the right of the central mark on the scale.

The last set of figures shows the selected f-stop for the lens. These are on the lens aperture ring and, as you change the aperture, the selected f-stop under the central line on the depth of field scale will tell you what aperture you've selected.

To find out what part of a scene is in focus is simply a matter of reading the distance scale for the two marks for your selected f-stop on the depth of field scale. For example, let's say you've focused on something that's 3 feet away. If your lens is set at f/2.8, then reading the distance values at the two "2.8" marks on the lens shows that everything just shy of 3 feet to about 3.5 feet will be in focus (a little guesstimation is required in reading the distances). This is fine for isolating your subject from everything else.

If you close the lens down to f/11, then reading the distances for the two "11" marks shows that everything between just over 2 feet and 5 feet will be in focus.

If the lens is set to focus in infinity (the infinity mark is over the central mark on the depth of field scale), then you only need to read off the distance value for the f-stop mark to the left of the central depth of field scale as everything between it and infinity will be in focus. If you'd set your f-stop to f/5.6 on the 28mm lens, everything from just over 10 feet to infinity would be in focus. If you'd selected f/16, it would be everything from 5 feet to infinity.

Hyperfocal Focusing

Hyperfocal focusing is based on the fact that depth of field typically extends 2/3 behind the point focused on and 1/3 in front, but if you focus on infinity, the depth of field behind is completely wasted. You can make use of it if you refocus, putting the infinity mark (an "8" on its side) on the focusing ring against the aperture set on the depth of field scale (this is known as the hyperfocal point). If, for example, you set a 28mm lens to f/11 and focus on infinity, everything from about 9 feet (2.5m) to infinity will be sharp. Align the infinity mark against the "11" position to give hyperfocal focusing and the depth of field now extends from 4 feet (1.2m) to infinity, which is essential if you want foreground interest to be pin-sharp. If you set your lens to f/16 and rotate the focus barrel to place the infinity mark over the "16" position, then reading the scales shows that everything between just under 3 feet to infinity will be sharp.

The Hyperfocal distance is the that point above the central mark on the depth of field scale when the infinity mark has been put over the required f-stop mark on the depth of field scale. In the case of the 28mm lens at f/11, that's 9 feet / 2.5m. At f/16, the hyperfocal distance would be 5 feet. Remember that the hyperfocal distance will be different for lenses of different focal length and different f-stops.

There's a table on the webpage mentioned at the end of this article that shows the hyperfocal distance for different lens and f-stop combinations. The figures have been calculated mathematically. If your lens has a distance scale but lacks a depth of field scale, you can use this table to set your lens to the hyperfocal distance required.

Don't forget that the wider the angle of a lens, the shorter its focal length and the deeper its depth of field. So, as an example, an 18mm lens will have deeper (longer) depth of field than a 105mm. Also, the smaller the aperture you use the greater the depth of field; i.e. for a lens of any given focal length, there's more depth of field with it at f/16 than at f/4, for example.

Seeing the Difference

A subject like this benefits from a few pictures to illustrate the principles and show the results. Explanatory images showing the various lens markings and how to use them along with pictures to illustrate the results of using hyperfocal focusing can be found at: http://www.great-landscape-photography.com/hyperfocal.html

Gary Nugent is a software engineer by profession and has been in the business for over 20 years. Photography has been a hobby for an even longer period of time and he's now even more passionate about it since making the switch to using a digital SLR camera.

Gary is also passionate about astronomy and cats and publishes the Photon PDF astronomy ezine along with writing the acclaimed LunarPhase Pro and JupSat Pro astronomy software packages (available through his Night Sky Observer website).

Great Landscape Photography: http://www.great-landscape-photography.com
Night Sky Observer: http://www.nightskyobserver.com

In The News:

Jeers for ex-officials at Genoa bridge state funeral
Sat, 18 Aug 2018 12:49:00 +0100
Members of Italy's former government were jeered by the families of victims of the Genoa bridge collapse as four more bodies were found on Saturday.

Genoa bridge to be 'rebuilt in just eight months'
Sat, 18 Aug 2018 16:16:00 +0100
The collapsed Genoa bridge that left 43 people dead will take just eight months to rebuild, its operator has said.

Kofi Annan dies: World mourns 'guiding force for good'
Sat, 18 Aug 2018 10:33:00 +0100
Former UN secretary-general Kofi Annan, a Nobel Peace Prize laureate, has died at age 80.

Rescuers plead for help as thousands stranded in Kerala
Sat, 18 Aug 2018 20:48:00 +0100
Thousands of stranded people are awaiting rescue as monsoon floods continue to batter the Indian state of Kerala.

Putin on the Ritz: Vlad dances at minister's wedding
Sat, 18 Aug 2018 17:28:00 +0100
Russian leader Vladimir Putin has shown off his fancy footwork as he limbered up for talks with German Chancellor Angela Merkel.



tikatoshop.it

Erfahrungen mit Pallhuber Wein
Agen Bola SBOBET Terpercaya

Travel in comfort and at your leisure with CT Airlink Limousine & Car Service for top quality private transportation and exceptional customer service. We operate Sedans, SUVs & Vans for CT Car Services to covering all Connecticut airports including Car Service from CT to Newark Airport , Mohegan Casino Uncasville CT, Foxwoods Casino Mashantucket CT, Manhattan Cruise Terminal NYC, Brooklyn Cruise Terminal NYC and Bayonne Cruise Terminal NJ. CT Airlink hire licensed and friendly chauffeurs who have in-depth knowledge of the Areas.

Using a Camcorder to Record Family Events Quickly and Easily

Let's start there (but not spend too much time on... Read More

10 Things You Can Do to Protect Your Photographs from Infringement

While it would be nice to live in a house... Read More

Is your Digital Camera Compatible With Your Computer?

So you recently bought a digital camera or perhaps your... Read More

Where to Find Cheap Disposable Cameras

There are many kinds of disposable cameras. All disposable cameras... Read More

Sepia Toned Prints from Your Colour or Black and White Photos ? 5 Minute Digital Fix

Quite often I will have clients bring in old photographs... Read More

Bracketing and How To Use Tt Correctly...

What Is... Exposure BracketingExposure bracketing is a simple technique professional... Read More

Guidelines for Printing Great Photos at Home

So you have this great digital camera and you've taken... Read More

Kodak CX7300 Digital Camera

Quality digital cameras are becoming affordable for just about everyone... Read More

The Paradigm: Going Digital

As you might imagine the paradigm shift from traditional film-based... Read More

Fuji Digital Cameras

Fuji digital cameras entered the market in the late 90's.... Read More

Getting Your Photos Ready for Sharing

One of the main reasons people buy digital cameras is... Read More

Inspired Vision

A picture is worth a thousand words, so goes a... Read More

Better Photos with Your Digital Camera

Everyone has a digital camera today and we all take... Read More

How to Take Great Photos of Your Child

Children are naturally photogenic. Ive worked in studios and children... Read More

Wildlife Scouting Cameras

For years I wondered how big the bucks were that... Read More

Understanding Digital Photography

Most serious photographers and all professionals use a Single Lens... Read More

A Guide to Disposable Digital Cameras

Disposable Cameras (also called single-use cameras) first came on the... Read More

The Beginner Buyers Guide To Digital Cameras, Or The Ins And Outs Of Megapixels

The most important part of buying a digital camera is... Read More

Top 10 Digital Cameras - What You Need To Know About Them

There are a large number of top 10 digital camera... Read More

How to Buy Wholesale Disposable Cameras

Wholesale disposable cameras are disposable cameras bought in quantity. Bulk... Read More

Digital Camera Metering

Looking at the most intricate details of the digital camera... Read More

Make Your Digital Camera Batteries Last Longer

One technology that hasn't kept up with the rapid pace... Read More

Photographs Everywhere, But Is It Really Art?

I once heard a lady say to a photographer that... Read More

Why 1.5 Megapixels is Enough

Dots Per Inch is a useful measure of relative resolution.... Read More

Black and White is Beautiful

Think about Laurel and Hardy for a moment, or Charlie... Read More