Tuesday, 23 September 2008

My lens is faulty

50 1.8, originally uploaded by electrolyte2006.

Yesterday I blogged about how disappointed I was with the photos I took at the baptism on Sunday. I had a sneaking suspicion that my new lens was faulty and was the reason why the photos were so poor. After all, it couldn't possibly be down to me, the photographer, could it?

Well, to test this out I downloaded a focus chart from this website and followed the instructions. The way this focus chart works is that you set your camera up on a tripod and angle the lens towards the chart at an angle of 45 degrees. You then adjust the camera until the middle focus point is lined up with the black bar that says "focus here". If the lens is working properly this bar should be totally in focus. Also, the text on the left and the right where the rulers are, should be totally in focus too.

Well, with my lens, they most definitely are not. You can see it better in this close up:

Close up of 50mm 1.8 focus chart

My lens front focuses by about 10-14 mm which is the reason why when I focused on a person's eye on Sunday in the final photograph the eye, and in some case their whole head, were not in focus. You can see an example here:


Tonight I have emailed the retailer that I bought the lens from asking them if I can return it for a replacement. As I've only had the lens for only 3 weeks or so they should hopefully replace it. Wish me luck blog fans.

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