Diane Margetts's Blog – February 2010 Archive (8)

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This is one of my favorite photos of Dakota. And now ONLY because we are here to learn and improve photography, I must share the comments of the photographer that critiqued this photo because it was a lesson learned for me that I would like you to learn from me rather than through your own experiences. I got a thumbs up in composition. I was told that this was a good photo and if only I had of focused my camera on the dog, it could have been…

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Besides being technically correct, being well composed spells the difference between an ordinary photo and one with an impact. It is very important to know and understand the common principles of a good composition. We used the word "principles" rather than "rules" because the latter strongly suggests that a…

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I found the tutorial site below to be extremely helpful for anyway trying to learn Photoshop.

http://www.tutorial9.net/school-of-photoshop/

I will keep adding useful like for photography and post processing as I run across them . . .

This is a really good article/tutorial on shutter speed.…

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What is ISO? (From: Digital-Photography-School.com)



In traditional (film) photography ISO (or ASA) was the indication of how sensitive a film was to light. It was measured in numbers (you’ve probably seen them on films – 100, 200, 400, 800 etc). The lower the number the lower the sensitivity of the film and the finer the grain in the shots you’re taking.

In Digital Photography ISO measures the sensitivity of the image sensor. The same principles apply as in film… Continue

I wrote an earlier post about the problems I have been having with the color casts of my pics after processing in Photoshop and then saving to JPG. I finally found someone with the same problem, and better yet, the solution:



I shot a photo yesterday which has a reddish tint to it. This “warm glow” is very important to the image and I put a lot of work into getting it right. The image was shot as a DNG and manipulate in Photoshop, I saved it as a .psd for further manipulation or… Continue

Aperture defines the size of the opening in the lens, which in advanced cameras can be adjusted to control the amount of light reaching the film or digital sensor (CCD or CMOS). In combination with variation of the shutter speed, and variation in film speed (ISO), this will regulate the photograph's degree of exposure to light.



A device called a diaphragm usually serves as the aperture stop, and controls the aperture. The diaphragm functions much like the iris of the eye - it… Continue

The shutter speed refers to the amount of time that the shutter of the camera is open and the film/sensor is exposed to the light.



Shutter speeds on modern digital cameras are generally expressed as 1/x-th of a second. The range of shutter speeds can be expressed as: 1, 1/2, 1/4, 1/8, 1/15, 1/30, 1/60, 1/125, 1/250, etc. with each one being a fraction of a second. Each fraction of a second in this series is half the amount of time as the one to the left.



The speeds… Continue