Hans Nyberg
Posts: 2760
Location: Denmark
Registered: 28 Aug 2005
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Mark Schuster
Posts: 1319
Location: Welwyn Garden City, United Kingdom
Registered: 25 Jan 2006
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Re: New Canon Fisheye
Posted: 26 Aug 2010 at 9:35 GMT
updated: 26 Aug 2010 at 9:38 GMT
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If only Canon had made it 7.5mm to 15mm it would be the ideal lens for Canon APS-C users. In portrait mode the top and bottom of the image from a Sigma 8mm fisheye is lost on a 1.63 crop camera like the 40d and I suppose the same must apply for the Canon lens. This was not the case with the old Minolta 7.5mm whose image fitted, top to bottom, almost precisely.
Mark
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Hans Nyberg
Posts: 2760
Location: Denmark
Registered: 28 Aug 2005
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Re: New Canon Fisheye
Posted: 26 Aug 2010 at 9:53 GMT
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Mark Schuster said: If only Canon had made it 7.5mm to 15mm it would be the ideal lens for Canon APS-C users. In portrait mode the top and bottom of the image from a Sigma 8mm fisheye is lost on a 1.63 crop camera like the 40d and I suppose the same must apply for the Canon lens. This was not the case with the old Minolta 7.5mm whose image fitted, top to bottom, almost precisely.
Mark
Well you do not know that before you tested it. 8mm can have anything from 22 to 23.5mm circle and it could also be 180-190 degrees
Hans
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DorinDXN
Posts: 2802
Location: Timisoara, Romania
Registered: 14 Nov 2006
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Re: New Canon Fisheye
Posted: 26 Aug 2010 at 10:01 GMT
updated: 26 Aug 2010 at 10:19 GMT
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This is good news, and I agree with Hans, we must see some images first.
A great benefit will be that the free DPP will correct CA, I've seen so many panos with CA not properly corrected, professionals even said that is no good to correct the CA because you induce other problems (that is a sign of a lack of a (affordable) tool to correct the CA) and last issue: so many complains about the lack of the sharpness near to the borders of the Sigma 8mm while a proper correction of the CA increase very much the sharpness in that area.
cheers,
Dorin
www.livepanormas.com
p.s. some extra info
----8<-------------------
The Canon EF 8-15mm f/4L Fisheye USM lens is expected to be available in January of 2011 for an approximate retail price of $1,400.
----8<-------------------
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Smooth
Posts: 3729
Location: Mount Panorama, Australia
Registered: 21 Jul 2004
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Re: New Canon Fisheye
Posted: 26 Aug 2010 at 10:52 GMT
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Er, bummer!
More cash I'll be parting with. LOL
$1400.00 USD is steep but then again it is "L" series class lens, so really the price is quite cheap (depending on the image results). The fact DPP will support it is a bonus also as Dorin points out.
As a matter of interest, Dorin have you ever tried DxO Pro Elite with your Canon and Sigma 8mm? Even though the lens module says it for the f/4.0 version it deals with CA very well regardless be it f/4.0 or f/3.5 versions.
Actually you may not even need the Elite version (depending).
Regards, Smooth 
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DorinDXN
Posts: 2802
Location: Timisoara, Romania
Registered: 14 Nov 2006
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Smooth
Posts: 3729
Location: Mount Panorama, Australia
Registered: 21 Jul 2004
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Re: New Canon Fisheye
Posted: 26 Aug 2010 at 12:24 GMT
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OK, you are changing the EXIF data to reflect a supported lens yes? What are you tricking it to be? Seems to do a nice job.
Regards, Smooth
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DorinDXN
Posts: 2802
Location: Timisoara, Romania
Registered: 14 Nov 2006
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Re: New Canon Fisheye
Posted: 26 Aug 2010 at 12:30 GMT
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Smooth said: OK, you are changing the EXIF data to reflect a supported lens yes? What are you tricking it to be? Seems to do a nice job.
Regards, Smooth
EF-S 10-22mm f/3.5-4.5
cheers
Dorin
www.livepanoramas.com
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Nick Fan
[NodalNinja]
Posts: 696
Location: Hong Kong
Registered: 26 May 2006
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Re: New Canon Fisheye
Posted: 26 Aug 2010 at 13:25 GMT
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DorinDXN said: Smooth said: OK, you are changing the EXIF data to reflect a supported lens yes? What are you tricking it to be? Seems to do a nice job.
Regards, Smooth
EF-S 10-22mm f/3.5-4.5
cheers
Dorin
www.livepanoramas.com
Hi Dorin,
I thought lens correction was based on calibration data which was specific to a lens.
Is that just a co-incidence that EF-S 10-22mm has CA similar to Sigma 8mm?
nick
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DorinDXN
Posts: 2802
Location: Timisoara, Romania
Registered: 14 Nov 2006
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Re: New Canon Fisheye
Posted: 26 Aug 2010 at 13:52 GMT
updated: 26 Aug 2010 at 13:53 GMT
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Hi Nick,
Maybe some coincidence or something in lens geometry have the result that the sliders of CA correction combined to allow the correction of the CA at this level. There is also distorsion correction in DPP which I won't use.
However the CA correction is suppose to be safe as only 2 out of 3 channels (Red and Blue) are re-adjusted, so if the Green remains as in the original image then you have the same image at the end.
Even if some global (R+G+B) dirstorsion will accure, that can be reversed in PTGui through calibration.
Before 10-22mm patching I use another patch, don't remmember now wich, is written here in some old post, anyway this 10-22mm is more effective that the previous one I used.
Dorin
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Smooth
Posts: 3729
Location: Mount Panorama, Australia
Registered: 21 Jul 2004
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Re: New Canon Fisheye
Posted: 26 Aug 2010 at 14:49 GMT
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Thanks Dorin,
I seem to remember that you were using the 17-40mm L profile before, now that I think about it. Yes, so long as you are only using the CA adjustments and not lens distortion correction it seems to work well. I had to modify my Nikon D300s EXIF back to D300 for awhile because DxO hadn't offered an updated module. It did the job just fine.
Regards, Smooth
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Hans Nyberg
Posts: 2760
Location: Denmark
Registered: 28 Aug 2005
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Re: New Canon Fisheye
Posted: 26 Aug 2010 at 16:10 GMT
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DorinDXN said: Hi Smooth, I didn't tried the DxO, for now I'm using the DPP to correct the CA,
(the exif RAWs are patched with exiftoolgui) you can see some resulted pano here
dorin.europhoto.ro/Continental3/piscina_35.html
cheers,
Dorin
www.livepanoramas.com
'
Do you say this is Sigma 8mm?
If so I must say you did a very nice work.
What camera and shooting tech. 4 +zenith?
Maybe we can finally get Doug admit that supersize quality is the way to go.
Hans
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bigwade
Posts: 821
Location: Utrecht, Netherlands
Registered: 19 Oct 2005
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Re: New Canon Fisheye
Posted: 26 Aug 2010 at 16:58 GMT
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DorinDXN said: A great benefit will be that the free DPP will correct CA,-
dorin.europhoto.ro/Continental3/piscina_35.html
Nice work Dorin !
About DPP supporting this new lens I have some doubts....
I'm still waiting for the TS-E 17mm f/4 L Tilt-Shift Lens support, grrrrrr.
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DorinDXN
Posts: 2802
Location: Timisoara, Romania
Registered: 14 Nov 2006
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Re: New Canon Fisheye
Posted: 26 Aug 2010 at 17:10 GMT
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Thank you Hans and Frank.
Yes was Sigma 8mm f/3.5 shoot at f6.3.
Camera used Canon 350D, 6 shoots around at +5° tilt with NodalNinja R1 panohead
cheers,
Dorin
www.livepanoramas.com
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bigwade
Posts: 821
Location: Utrecht, Netherlands
Registered: 19 Oct 2005
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Re: New Canon Fisheye
Posted: 26 Aug 2010 at 17:16 GMT
updated: 26 Aug 2010 at 17:16 GMT
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DorinDXN said: Yes was Sigma 8mm f/3.5 shoot at f6.3.
Camera used Canon 350D, 6 shoots around at +5° tilt with NodalNinja R1 panohead
HAHAHAHA! (sorry, could not resist, www.panoguide.com/forums/qna/8267/)
WELL DONE DORIN !
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