Sunspots?

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22 Jul 2004 - 12:39 PM

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canonshooter

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22 Jul 2004 - 12:45 PM

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It sounds like lens flare. It's what happens when the light entering the lens reflects back onto the previous glass element. Also noticeable if you have a filter on the end of your lens.

Normally you'd have a lens hood attached, but that won't help if the sun is in the frame.

If it's due to the filter, you'll usually only see one spot, if it's due to the lens elements, you'll see one spot for every piece of glass inside your lens. That's not always the case, but most times, I've found.

michaeldt

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22 Jul 2004 - 12:52 PM

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hi james. it's called flare and it happens when sunlight hits the front lens element directly. the shape of the spot will be pentagonal, hexagonal, heptagonal or octagonal as this is the shape of the aperture.

to reduce flare, make sure that when shooting into the sun, the sun is behind an object or out of the frame and that no direct sunlight hits the front of the lens - a lens hood is useful here.

to do this in practise, mount the camera on a tripod, set up the shot and then move around to the front of the camera. put the lens hood on and see if it's shadow will create a large enough shadow. if not, you might need to find another object. but all you basically need to do is cast a shadow on the front of the lens, without obstructing the picture - obviously!!

bramo

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22 Jul 2004 - 12:55 PM

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Thanks too Michael, we posted the last two at the same time. I'll see if my long lens hood fits my littler lens (same filter size)....