iStockphoto - Stock Photographer Training Manual

2.1 - Quality Standards : Focus

Motion Blurs: Motion blur is achieved by lowering the shutter speed, (1/4 to 1/15 sec) on your camera, to capture movement. The keys are intention, effort and composition. As stated on the Needed Files page, iStock has reached its limit of blur abstracts; unless an image is unique and high resolution, we are not accepting any more of this category.

Do Submit:
Motion blur that demonstrates movement		Composed light blurs
Do Not Submit:
Blur abstracts

Soft Focus: Soft Focus is the effect of bending light areas with soft blurring while still maintaining the quality and detail of the image. Images that have lost detail in appearance may be declined or subject to a lower rating based on the overall quality and composition of the photo. "Soft focus" and "slightly out-of-focus" are not the same thing, and the latter will be declined.

Soft Focus Examples:

Camera Shake: Lower shutter speeds do not freeze action as higher settings, and make your camera more sensitive to movement (an unsteady hand, for example) while taking a photo. Using a wider aperture (lower "F" number) can allow you to shoot at a faster shutter speed, as can using a higher numbered ISO/ASA (film sensitivity). The drawbacks of these solutions are that a wider aperture will cause a more shallow depth of field (DOF), and a higher ISO may cause more grain/noise. The best solution for camera shake is to use a tripod and remote trigger. If you are in a pinch try using both hands and leaning against something grounded. Camera shake can often happen with digital cameras and also specific lenses.

Tips:

· For blur effects always keep intention, effort and composition priority

· Blur effects are seldom effective if applied to the whole image

· Blurring should never compromise the quality of the image

· Use a tripod & remote trigger to avoid camera shake

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