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Got a case of the blurries and have no idea why? It may be your shutter speed and not your auto-focus!

Program Mode will not circumvent this issue in most cases. Program looks for light and not focal length. You have to control the camera a little more in order to control the end result. You’ll feel better about yourself as well knowing that you had a huge input into your results.

Let’s start with the camera body itself.

Depending upon which camera you purchased, you will either have a Full Frame Sensor “FX” or a smaller one called a “DX”. This makes a huge difference in your shutter speed settings. A 200mm is not always a 200mm lens. On a full frame sensor it is but on a 2/3 sensor it now is closer to 300mm. Here’s the root of the problem.

In order to stop camera shake, you must match the shutter speed to the length of the lens (at a minimum) unless you have a vibration reducing lens.

The magnification and the lack of stability is what creates blurry images.

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Although this image is acceptable, it is not as good as it could be. A 200mm lens, a 2x converter on a full frame sensor makes for a 400mm lens. The slowest shutter speed needed would have been 1/400th of a second. If it were the same lens and converter on a 2/3rds chip you would have been virtually using a 600mm lens thus requiring 1/600th of a second shutter speed.


Sometimes the light and the speed of the lens won’t allow you to get tot the numbers you need. That’s when ISO comes into play. Every time you double the ISO, you gain either one f-stop or one full shutter speed change.

1/125th sec @ f8 with ISO 100
= 1/250th sec @ f8 with ISO set at 200

1/125th sec @ f8 with ISO 200 =
1/125th sec @ f11 with ISO set at 200

Standard f-stops (designed for mechanical
apertures long ago in a place far away) are as follows.
f-1.8, f-2.0. f-2.8, f-3.5, f-4.5, f-5.6, f-8, f-11, f-16, f-22

Digital F-stops like f-7.1 or 6.3 are in fractions of stops.

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NOTE: IMAGE STABILIZATION LENSES ALLOW YOU TO DROP DOWN ONE OR 2 SHUTTER SPEEDS.
THE STABILIZATION SHOULD BE TURNED OFF WHEN USING A TRIPOD OR MONOPOD.

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