Problem with lens

[jterry85]

So I finally got my Canon Digital Rebel XT in the mail today (my wife had to mail it to me here in Afghanistan, I've had it awhile now.) and when I took a trial picture using my Tamron 28-80mm lens the picture looked like it had a bright light flare in it. When I put another lens on it worked fine. Does anyone know what kind of problem this could be with the lens?

 

[Jarmo]

Did you try looking through the lens? Are all the elements intact? Dust?

 

[KmH]

Were you shooting towards trhe Sun. Does the lens have a filter screwed onto the front of it? Are the front and rear lens elements clean?

 

[jterry85]

I looked through the lens and everything looked intact. I was not shooting outdoors I was shooting inside my tent which isn't very well lit but isn't completely dark either. When I looked through the lens I did see some dust but not a whole lot. I have a cpl and uv filter on the lens.

 

[The_Traveler]

I looked through the lens and everything looked intact. I was not shooting outdoors I was shooting inside my tent which isn't very well lit but isn't completely dark either. When I looked through the lens I did see some dust but not a whole lot. I have a cpl and uv filter on the lens.

never stack filters
use one or the other, not both.

 

[Dao]

I think you do not need the CPL as well as the UV filter while you are inside the tent. And Try to avoid bright object(s) within the frame. i.e. A bright light bulb or lamp.

Most of the lenses have lens flares when shooting against a bright object, the one that has a better coating usually has better light flares control.

 

[KmH]

Filters add air gaps which make more surfaces that allow reflections within the air gap. Lens flare is just that, the reflection of a light source in the lens.

By having both a CPL and a UV on the lens you added 3 extra surfaces that could cause lens flare.

Try it again without any filters on the lens.

 

[levinest]

I don't know if this is a general rule or not, but I've found that the smaller the aperture the more I get the sun star phenomenon. Certainly the better glass tends to minimize that issue. Also, multicoated filters are designed specifically to minimize things like flare.

 

[KmH]

The "sun star phenomenon" is also known as diffraction spikes, and is caused by a small aperture and the lens aperture blades.