Wide Angle Zoom

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December 16th, 2009 admin Leave a comment Go to comments

Wide Angle Zoom

How to Get the Best Depth of Field: Wide Angle Vs. Telephoto

As someone who is passionate about, you are probably interested in knowing how to include more depth of field in your photos. There is a lot of literature on this subject. If you're a professional photographer, you've probably learned some things about wide angle (shorter focal length) and telephoto lenses (long focal length). For years photography textbooks and magazines have been promoting the idea that a wide-angle lens provides more depth of field compared to a telephoto one. However, if you type 'depth of field' on Google, you will soon come across a lot of articles arguing this assumption.

Recent tests taken by experts, including several photo magazines, have proven that, technically speaking, a wide-angle length does not provide more depth of field. These tests are quite easy and you can conduct them yourself to verify the conclusions. But how does this impact your work as a photographer? All these tests assume that you keep the picture size constant. They go like this: take a photo of some subject using a telephoto and then zoom out and use the wide angle lens. You can also use interchangeable telephoto and wide angle lenses. Then take the photo made with the short focus lens and enlarge a selected portion of it until is the same size as the same portion in the other photo. You will see that there is no significant difference between them. This proves that wide angle lenses don't actually provide more depth of field.

Now, let's see why you actually zoom out. Say you are in front of an amazingly beautiful scenery, such as a mountain landscape beautifully colored with sunrise light. You zoom in and take the picture with a telephoto setting. Then you zoom out and take the photo using the wide angle setting. You expect to get more depth of field with the last photo and that's what it looks like. You would never think that if you enlarge a portion of it this apparent depth of field will disappear. When you use a wide angle setting, you zoom out because you want to capture more things in your picture. You are aware that the objects will look smaller and it doesn't bother you. In the same way, when you zoom in you want to focus on a certain aspect of the photo even though you know you will loose depth of field. Zooming in and out and using different focal length setting makes you perceive that the depth of field also varies. Photos taken with the wide angle appear to include more depth of field compared to those taken with the telephoto. This may not be true technically. But what is in fact a photograph? What appears to the viewer. If you don't place technical correctness above everything else, you should stick to what you've known and has proven right for years. As long as you like what you get, why drop it? Your photos will prove if you are on the right path or not.

About the Author

Mr. D. is a writer about photo resizer software applications at Reshade. The business focuses on picture resizing providing an
online photo resizing software
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what is the difference between wide angle zoom and telescopic zoom?

guys i am in confusion...
please explain it to me.....

A wide-angle zoom would be a lens with a focal length of 12-24mm or 17-35mm.

A telephoto zoom might be 55-200mm or 70-200mm or 70-300mm.

There are also zooms that go from wide to long - 18-200mm.

Here is an easy way to tell the difference: The shorter the focal length (10mm, 12mm, 18mm) the wider the angle of view. More area of a scene can be included. The longer the focal length (70mm, 100mm, 200mm), the narrower the angle of view. Less area of a scene can be included. Suppose you're standing 20 feet away from a building with an ornate door. At 18mm you can include the entire building. At 200mm you can show only the door or part of it.

Powershot SX1 test video: zoom to 80X and back to wide angle