thambi
Posts: 34
Location: san antonio, United States
Registered: 1 Jun 2009
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Sigma 10mm + Canon 40D. Light Flare is horrible even at small fstop. Help.
Posted: 10 Jul 2009 at 17:45 GMT
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Hi,
I have been getting a horrible light flares even if i use a small fstop say f16 f11 f8. But it's new lens and i dont see any dust particles and am sure there is no dust. Here is the link for the 360 which i shot day before. It has 2 different 360 panos. Please have a look at them and help me to get rid of that light flares. Thanks in advance.
Link to download Panos: rcpt.yousendit.com/711966042/71302329cee05ad289f8...
No password required.
Thanks!
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Hans Nyberg
Posts: 2791
Location: Denmark
Registered: 28 Aug 2005
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Re: Sigma 10mm + Canon 40D. Light Flare is horrible even at small fstop. Help.
Posted: 10 Jul 2009 at 18:08 GMT
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Weird file. I get a 3.2mb file with ending .7z
Not sure what it is supposed to be.
I tried to change it to .swf and to ,mov but no luck.
Hans
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Hans Nyberg
Posts: 2791
Location: Denmark
Registered: 28 Aug 2005
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Re: Sigma 10mm + Canon 40D. Light Flare is horrible even at small fstop. Help.
Posted: 10 Jul 2009 at 18:18 GMT
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What do you use to convert your Raw files with.
Most Raw converters have CA removal. I checked some jpg samples I have from Sigma10mm and they are absolutely very ugly.
However without trying the RAW files I can not say if all CA can be removed.
Hans
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John Houghton
Posts: 3487
Location: Hitchin, United Kingdom
Registered: 17 Jan 2005
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Re: Sigma 10mm + Canon 40D. Light Flare is horrible even at small fstop. Help.
Posted: 10 Jul 2009 at 18:23 GMT
updated: 10 Jul 2009 at 18:27 GMT
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The .7z zip archive can be expanded with various programs, as detailed on this page:
www.fileinfo.com/extension/7z
WinRAR worked ok for me.
John
I could upload the two .swf fles to my server if it would help.
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Hans Nyberg
Posts: 2791
Location: Denmark
Registered: 28 Aug 2005
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Re: Sigma 10mm + Canon 40D. Light Flare is horrible even at small fstop. Help.
Posted: 10 Jul 2009 at 18:58 GMT
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You can download a set of sigma 10mm jpg at 360precision.
digg.com/u17p2Y
Hans
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thambi
Posts: 34
Location: san antonio, United States
Registered: 1 Jun 2009
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Re: Sigma 10mm + Canon 40D. Light Flare is horrible even at small fstop. Help.
Posted: 10 Jul 2009 at 19:15 GMT
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hi all,
sorry for the delayed response. i did a small research and with the help of john i was very lucky to return that sigma 10mm fisheye back to the shop. today is my last day to return it. and just placed a new order for tokina 10-17mm lens. i have seen some of hans panoramas on tokina. it was stunning and have already seen some of john's panos. i hope tokina is definetly give the best result. and sorry about 7zip. 7zip is just like winzip and winrar. you can use any winzip or winrar to extract the files. pls comment about tokina 10-17mm. that would help me
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thambi
Posts: 34
Location: san antonio, United States
Registered: 1 Jun 2009
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Re: Sigma 10mm + Canon 40D. Light Flare is horrible even at small fstop. Help.
Posted: 10 Jul 2009 at 19:15 GMT
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what is CA means hans? i dont get that. by the way, i use canon raw 5.4 for photoshop.
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Smooth
Posts: 3773
Location: Mount Panorama, Australia
Registered: 21 Jul 2004
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Re: Sigma 10mm + Canon 40D. Light Flare is horrible even at small fstop. Help.
Posted: 10 Jul 2009 at 19:29 GMT
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CA = Chromatic Aberration/Colour Shift/Colour Fringing
It has absolutely nothing to do with the complaint you had about the lens flare.
Regards, Smooth 
www.smooth360.info
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Hans Nyberg
Posts: 2791
Location: Denmark
Registered: 28 Aug 2005
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Re: Sigma 10mm + Canon 40D. Light Flare is horrible even at small fstop. Help.
Posted: 10 Jul 2009 at 19:51 GMT
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Never use a zipper which puts an extension like .7z
This means that you do not know what it is.
I only heard of one extension which only uses 2 characters, the .ai Illustrator file which I always found weird.
The standard dezipping on Mac can not recognize the .7z and not even my Stuffit Expander accepts it. Not even after changing the extension to .zip.
Hans
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Hans Nyberg
Posts: 2791
Location: Denmark
Registered: 28 Aug 2005
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Re: Sigma 10mm + Canon 40D. Light Flare is horrible even at small fstop. Help.
Posted: 10 Jul 2009 at 20:01 GMT
updated: 10 Jul 2009 at 20:02 GMT
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Smooth said: CA = Chromatic Aberration/Colour Shift/Colour Fringing
It has absolutely nothing to do with the complaint you had about the lens flare.
Regards, Smooth
www.smooth360.info
Well, thats not quite true.
Actually Colour fringing can also be the result of lens flare.
The Sigma 10mm has more CA than I seen on any other fisheye so it may be connected.
Hans
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John Houghton
Posts: 3487
Location: Hitchin, United Kingdom
Registered: 17 Jan 2005
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Hans Nyberg
Posts: 2791
Location: Denmark
Registered: 28 Aug 2005
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Re: Sigma 10mm + Canon 40D. Light Flare is horrible even at small fstop. Help.
Posted: 10 Jul 2009 at 21:12 GMT
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That looks like dust.
I did exactly the same with my brand new Canon 15mm which is about the best fisheye you can get without almost any flair or CA.
But I forgot to clean it and my first panorama looked exactly like that.
New lenses has to be cleaned.
Hans
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bigwade
Posts: 826
Location: Utrecht, Netherlands
Registered: 19 Oct 2005
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thambi
Posts: 34
Location: san antonio, United States
Registered: 1 Jun 2009
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Re: Sigma 10mm + Canon 40D. Light Flare is horrible even at small fstop. Help.
Posted: 10 Jul 2009 at 21:49 GMT
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hans, cleaning? what do you mean by cleaning? just clean with a soft cloth which i have in the lens cleaning kit? if it's what you mean i have done that many times. and when i see the lens i see it very clear. i dont even see any finger printts or dust in that. i dont know why. anyways i have returned it and placed a new order for tokina 10-17mm fish eye.
thanks for uploading those files in your website john. i really appreciate it.
and sorry about 7zip. that's the best extractor i have seen in compression. so i used it. i did not think of mac. sorry.
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Smooth
Posts: 3773
Location: Mount Panorama, Australia
Registered: 21 Jul 2004
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Re: Sigma 10mm + Canon 40D. Light Flare is horrible even at small fstop. Help.
Posted: 11 Jul 2009 at 5:31 GMT
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Hans Nyberg said: Smooth said: CA = Chromatic Aberration/Colour Shift/Colour Fringing
It has absolutely nothing to do with the complaint you had about the lens flare.
Regards, Smooth
www.smooth360.info
Well, thats not quite true.
Actually Colour fringing can also be the result of lens flare.
The Sigma 10mm has more CA than I seen on any other fisheye so it may be connected.
Hans
Yeah your right Hans, that's exactly what it is!
Yet again when your wrong you find a way to be right - we expect nothing less 
Hopefully most arn't as blind to the bleeding obvious as you think.
Regards, Smooth
www.smooth360.info
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