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03-20-2012, 08:36 PM   #1
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Lens flare or defective lens?

First time shooting with the new DA 15mm. I can't tell if this is lens flare or a defect in the lens. I have never had lens flare like this before. Any help is much appreciated before I freak out any further and start digging through the trash for the lens box.









Last edited by TMB; 03-21-2012 at 06:28 AM.
03-20-2012, 08:50 PM   #2
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Yup, that's flare. Looks like it's being caused by the nearby lamp on the left.

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03-20-2012, 08:51 PM   #3
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Dig through that trash anyway. Boxes add to the long-term resale value, of course if you're never going to sell it.......

Glad it wasn't a defect!
03-20-2012, 09:13 PM   #4
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Yep, looks like the usual consequence of taking 30second long exposures :P

03-20-2012, 09:30 PM   #5
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Fortunately you can easily clone out the spot in post processing and then you'll have some pretty good images!
03-20-2012, 09:58 PM   #6
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Correct me if I'm wrong, but it looks like you are using a star filter. I know that stopped down you can get a star effect from the aperture blades, but this is better than I thought the blades could do. So, if it is a filter (star or UV) it could be flaring off the filter surface which probably is not coated. But, whether or not you use a filter, a lens hood or even shielding the side of the lens with your had will block out the stray light.
03-20-2012, 10:06 PM   #7
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Ok. This has to go down as dumbest mistake ever. I did not realize that the lens hood on the DA 15 pulled out from the lens.....which explains the flare.
03-20-2012, 10:24 PM   #8
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TMB, please resize your images before adding them to a post. Not everybody has unlimited bandwidth and not everybody has fast connections.

Resize to something like 1000 at the longest side and use lower quality like 80% (that should give a file size of around 100kB instead of 12MB) and if you want to show a detail, crop and resize (using the above guideline).

Thanks in advance.

03-20-2012, 10:25 PM   #9
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QuoteOriginally posted by AOShep Quote
Correct me if I'm wrong, but it looks like you are using a star filter. I know that stopped down you can get a star effect from the aperture blades, but this is better than I thought the blades could do. So, if it is a filter (star or UV) it could be flaring off the filter surface which probably is not coated. But, whether or not you use a filter, a lens hood or even shielding the side of the lens with your had will block out the stray light.
It's possible to get a star that big using the DA15 but I would be curious if there is a protective filter on the lens. It's rare to get flare that bad with the 15 from what I've seen.
03-20-2012, 11:09 PM   #10
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What others have asked, are you using a UV or some other kind of filter on the lens? If you are, remove it. also use the hood.
03-21-2012, 05:43 AM   #11
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No...No filter. Sorry about the image size.

Here is the exif data:

CameraPentax K20DExposure30Aperturef/11.0Focal Length15 mmISO Speed200

Last edited by TMB; 03-21-2012 at 03:36 PM.
03-21-2012, 10:55 AM   #12
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Thanks for adjusting; lot better
03-21-2012, 10:18 PM   #13
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Ok. Here is a good one. Thanks for the info everyone.

03-22-2012, 07:28 PM   #14
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The well-defined star pattern is characteristic of the DA 15 to the point that it is sort of a hallmark for the lens. Take a walk through the same gallery (LINK) and you will see plenty of examples. Starred specular highlights are not uncommon with ultra-wide angle lenses and are usually not as pretty as those in your photos.

...or were you referring to the UFO in the first picture?


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03-23-2012, 07:20 AM   #15
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QuoteOriginally posted by stevebrot Quote
...or were you referring to the UFO in the first picture?

Steve
Actually, after talking with several friends, we decided that the hexagon has to be a light orb....some distressed spirit hovering over the city. Maybe the ghost of the bicyclist that was killed before they built the bridge.
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