Chris Norris OCA blog
Learning log for the OCA course Art of Photography
Monday 31 December 2012
Measuring exposure
Varying exposure values from f4.0 to f 7.1 My camera has a auto bracketing feature which can be pre-selected meaning that one press of the shutter takes an image at the correct exposure and then one step about and one step below. The steps can be set at 1, 1/3, or 2/3rds of a stop. I have used this feature to stitch together three images to produce an HDR image using photomatrix software.
Higher and lower sensitivity
Pictures taken at iso of 200 / 400 / 800 showing different amount of grain 200 (Less) 800 (more). Generally higher values give less clarity and auto iso on my D7000 can be selected to limit at a higher value such as iso 800. However reading the web suggests that the camera can give clear pictures up to 1600 in ideal conditions. It lectures it has been suggested to me that the D7000 as a Nikon has a 'sweat spot' at iso 200 meaning that this is the clearest image although generally the lowest iso of 100 is thought to give greater clarity
Wednesday 10 October 2012
My first published picture!!
Just had my first picture published in Big Issue magazine. Not sure how to attach the PDF of the magazine page within the blog.
Monday 17 September 2012
Images in Picassa.
Colours into tones in B&W
This exercise represents my total frustration with this OCA course. I have completed the exercise taking a colour picture (clothespegs) with a grey card (magazine image actually). Put it into Lightroom and applied 4 filters to see 4 results. Learnt a lot from this exercise but I don't know how to save each image. I have had no lightroom training other than online stuff and forums and there is knowone to ask. Forums are so impersonal and I really need a genuine human being to relate to. I have made the decision that this type of course is just not for me.
Thursday 30 August 2012
Colour relationships
The plug and diary are yellow / purple in a ration of 1:3
Scissors to file red to green 1:1, although there is probably more of the green file than there should be.
Orange on blue filing case 1:2.
Wednesday 29 August 2012
Primary and secondary colours
Controlling strength of colour
This is a series of images of a light blue wall shot at 1/50th second from f3.5 (lightest) through to f8.0 (darkest). The colour saturation is more intense at the smallest aperture where the image is underexposed.
Tuesday 28 August 2012
Photographers eye book
Monday 27 August 2012
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