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Originally Posted by robski
Don
Have I started a trend here with the Barcode test ? I never thought it would catch on. What is the distance from your lens to target ?
I see on your test the small black & white size is 10 pixels whereas Roy's was 6 pixels. Surely you can match Roy's test.  |
Rob,
Biggest problem I had was the wind. As this was a tripod test I had to set the target at 6 feet above ground to have the tripod on a normal working extension.
Perhaps we need a WPF test target based on your bar code idea.
This was an interesting experience as the first test used a 5 litre container of cement for stability but checking the results showed softness in some shots and not in others. Given that wind effect on he target was negligble due to is weight and some of the worst results were at high shutter speeds. I put the camera on my big Slik tripod and re-did the series. Same problem but at different settings to the first test. I replaced the target with the plasticiser container a bit nearer and out of the wind and used manual focus. No problems. I now recognise that my A/F does not give guaranteed accuracy on semi shiny surfaces.
Don