Warning: Tokina AT-X 16-28mm f/2.8 Pro FX Lens Strange Rainbow Flare

Started Feb 7, 2013 | Discussions thread
Leonard Shepherd
Leonard Shepherd Forum Pro • Posts: 13,253
Re: do you use a front filter?

Placation101 wrote:

This is limited to night shots as far as I can tell.These flares generally are on opposing sides of the light source and point/angle toward the center of the lens/frame.

What you describe is typical of bright highlights spreading out into surrounding dark areas. The issue is much more noticeable at night because much of the surrounding area is not illuminated.

Digital sensor surfaces are a lot more reflective than film and this type of issue is not uncommon with your subjects. What happens is some light in the highlight areas gets reflected forward from the sensor and then reflected back either off an internal lens element or off the back of a flat filter.

Often internal lens elements have the right shape to let the light from the sensor pass harmlessly out of the front of the lens. Unfortunately flat filters are often not a good angle and multicoating on filters works only over a very narrow angle. Becauseof this you are much more likely to get the problem if you use a front filter.

Some lenses are also more prone to this type of problem than others.

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Leonard Shepherd
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