Edwin Karganilla
Posts: 39
Location: Metro Manila, Philippines
Registered: 3 Jul 2009
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Hot spots/flare? How to prevent?
Posted: 8 Sep 2010 at 16:09 GMT
updated: 8 Sep 2010 at 16:10 GMT
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Hi,
Took this zenith of an interior shot I did earlier.
Here's my exif:
Device: Nikon D700
Lens: 16mm F/2.8D
Focal Length: 16mm
Focus Mode: Manual
AF-Area Mode: Single
AF Fine Tune: OFF
Aperture: F/8
Shutter Speed: 1/1.6s
Exposure Mode: Manual
Exposure Comp.: +1.0EV
Exposure Tuning:
Metering: Matrix
ISO Sensitivity: ISO 200
What should I do next time to prevent those spots? Is it because of the lens I am using?
Thanks,
Edwin
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Hans Nyberg
Posts: 2791
Location: Denmark
Registered: 28 Aug 2005
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Re: Hot spots/flare? How to prevent?
Posted: 8 Sep 2010 at 16:59 GMT
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Clean the lens. Both front and back. I doubt that the Nikkor 16mm fisheye actually does produce this.
Hans
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Bradford Bohonus
Posts: 224
Location: United States
Registered: 29 Jan 2008
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Re: Hot spots/flare? How to prevent?
Posted: 8 Sep 2010 at 19:57 GMT
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Wow, I had no idea Dairy Queen was also in the Phillipines? They closed most of them around Seattle. Not the best weather around here I suppose for that sort of thing.
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Edwin Karganilla
Posts: 39
Location: Metro Manila, Philippines
Registered: 3 Jul 2009
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Re: Hot spots/flare? How to prevent?
Posted: 20 Sep 2010 at 11:47 GMT
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Hans Nyberg said: Clean the lens. Both front and back. I doubt that the Nikkor 16mm fisheye actually does produce this.
Hans
hi Hans,
actually, my copy has small markings on the front element. like raindrops, permanent. got this really cheap from a friend. 
it does not usually show on regular outdoor shots. will try another indoor zenith shot with ceiling lights.
thanks,
edwin
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Edwin Karganilla
Posts: 39
Location: Metro Manila, Philippines
Registered: 3 Jul 2009
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Re: Hot spots/flare? How to prevent?
Posted: 20 Sep 2010 at 11:48 GMT
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Bradford Bohonus said: Wow, I had no idea Dairy Queen was also in the Phillipines? They closed most of them around Seattle. Not the best weather around here I suppose for that sort of thing.
yup we have them here, in most malls in Metro Manila.
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hindenhaag
Posts: 729
Location: Netherlands
Registered: 7 Mar 2010
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Re: Hot spots/flare? How to prevent?
Posted: 20 Sep 2010 at 18:07 GMT
updated: 20 Sep 2010 at 18:11 GMT
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Edwin,
that's the reason why you get this result. I do not get this on my 16mm nikkor.
May be you ask a Nikon Service point to have a look at it. Now you know why I asked you to take a testshot with a second hand lens in the other thread
Heinz
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Edwin Karganilla
Posts: 39
Location: Metro Manila, Philippines
Registered: 3 Jul 2009
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Re: Hot spots/flare? How to prevent?
Posted: 6 Oct 2010 at 5:49 GMT
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hindenhaag said: Edwin,
that's the reason why you get this result. I do not get this on my 16mm nikkor.
May be you ask a Nikon Service point to have a look at it. Now you know why I asked you to take a testshot with a second hand lens in the other thread
Heinz
Hi Heinz,
I just finished another shot this morning. Shooting the same store(different branch), the spots were crazy. I was shooting at F8, infinity. I opened the aperture to F6.3, and noticed that the spots were reduced. Lowered to F4, still some signs of spots, at F2.8, their gone.
conclusion, the marks/tiny specs (not scratches) on the front element is the culprit. open wide, obviously they will not show on the photo.
i'm hoping the 2.8 shots are sharp enough for a VR. if not, would probably need to spend time on cleaning up the spots in post-processing...
thanks!
edwin
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Hans Nyberg
Posts: 2791
Location: Denmark
Registered: 28 Aug 2005
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Re: Hot spots/flare? How to prevent?
Posted: 6 Oct 2010 at 7:12 GMT
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Edwin
You should try take the zenit at a different pitch. You can use anything from 65 to 90 with the 16mm.
Or you can take 3 at 45 or 60.
'Hans
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hindenhaag
Posts: 729
Location: Netherlands
Registered: 7 Mar 2010
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Re: Hot spots/flare? How to prevent?
Posted: 6 Oct 2010 at 7:43 GMT
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Edwin,
may be you try to clean the lens with a pre- moistened microfiber cloth softly by doing it several time to remove layer per layer.
Have a look to this: www.panoguide.com/forums/qna/8519/
Regards
Heinz
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Hans Nyberg
Posts: 2791
Location: Denmark
Registered: 28 Aug 2005
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Re: Hot spots/flare? How to prevent?
Posted: 6 Oct 2010 at 7:57 GMT
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Edwin Karganilla said: Hans Nyberg said: Clean the lens. Both front and back. I doubt that the Nikkor 16mm fisheye actually does produce this.
Hans
hi Hans,
actually, my copy has small markings on the front element. like raindrops, permanent. got this really cheap from a friend.
it does not usually show on regular outdoor shots. will try another indoor zenith shot with ceiling lights.
thanks,
edwin
If the spots are not scratches there is no problems cleaning it. Water drops can be quite resistant to clean but you can use distilled water or iso-propanol for cleaning your lens. Just use a clean microfiber cloth.
People are far to afraid of cleaning lenses. The glass and the coatings are very resistant and all the warnings you sometimes find about it are not at all true. I have cleaned lenses daily for the last 40 years when using them and I never seen any lens been damaged by it.
Read Bob Atkins advice, he is one of the Pros you can trust.
'www.bobatkins.com/photography/tutorials/lens_filt...
Hans
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Sam Rohn
Posts: 267
Location: Brooklyn, New York, United States
Registered: 5 Mar 2008
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