Bracketing is a general technique of taking several shots of the same subject using different camera settings like exposure, sensitivity, white balance, focus or depth of field. This technique is used to accomplish one of the following objectives: When it … Continue reading
The exposure value (EV) is a number that represents a certain combination of aperture value and shutter speed (exposure time). The idea of representing these combinations as numbers belongs to a German shutter manufacturer Frederich Deckel who introduced this notation … Continue reading
Like aperture priority, shutter priority is a semi-automatic mode of exposure where the shutter speed (or exposure time) is set manually and the aperture is calculated by the camera to obtain the correct exposure for a given scene. As we … Continue reading
Aperture priority is a semi-automatic mode of exposure, where the aperture is selected manually and the exposure time is calculated by the camera in such a way that the correct amount of light reaches the sensor (see the reciprocity principle … Continue reading
Remember the simple equation that defines the exposure? The equation was introduced in the post “How Much Light Is Needed Inside the Camera?” and shows that the exposure (i.e. luminous energy) represents the product between illumination (modulated by the aperture) … Continue reading
About two weeks ago I’ve been asked “I’ve seen some photos when there is blurred like a strip above and below and the middle strip is sharp – any idea how that happens?” The question came when I posted the … Continue reading
As a direct consequence of the sensor geometry, for a given resolution, the pixel density is higher for the smallest sensor (and the size of the pixel itself is smaller). The pixel density is important because this will influence the … Continue reading
A photography tutorial about sensors would be incomplete without a discussion about sensitivity, noise, resolution and the interconnection between them. Without question the marketers and especially the sales people will emphasize the resolution as the most important parameter of the … Continue reading
In this photography tutorial we will try to answer the question “What is really a photo sensor?” but without all the technicalities that such a subject would require. I will begin by saying that the photo sensor has the same … Continue reading
This is probably one of the least understood and ignored aspects of using different focal lengths by beginners. They see “zooming” mainly as a way to get closer to or move away from the subject. Which is correct but it … Continue reading