Judy-A
Posts: 505
Location: Edmonton, Canada
Registered: 20 Jan 2010
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Bill Bailey
[NodalNinja]
Posts: 595
Location: Phoenix, Arizona, United States
Registered: 27 Jan 2005
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Re: Spring Breakup with Samyang fisheye
Posted: 19 Mar 2010 at 19:59 GMT
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It's easy to see why the Samyang lens is gaining in popularity. Your exposures were spot on and sky not blown out (common on overcast days).
IMO the only thing I would have done to enhance the panos would have been to add a bit more vibrancy so as to enhance the green trees. You could also attempt pseudo bracketing.
But still well done - thanks for sharing and glad to see our pano head performing well in chilly weather - makes one appreciate the larger easy grip NN knobs for days when you might want to wear gloves.
Cheers
Bill
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Judy-A
Posts: 505
Location: Edmonton, Canada
Registered: 20 Jan 2010
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Re: Spring Breakup with Samyang fisheye
Posted: 19 Mar 2010 at 22:02 GMT
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Thanks, Bill.
So much to learn! As the Samyang lens is fully manual, I'm having to get used to judging exposure.
I had taken single NEF images, exposed for the sky. This left the dark areas quite dark, which I lifted with Fill Light in Camera Raw. When I tried enhancing the vibrance or saturation settings, the dried grass got unnaturally red.
That said, the spruce trees around here are a rather dull green before summer growth starts. (Well, that’s my excuse, anyway.)
Next time, I'll bracket, taking care to get better exposures across the light/dark continuum.
The Nodal Ninja bracket performed perfectly. The same can’t be said for my tripod which was sinking into mud and snow all afternoon.
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DennisS
Posts: 1210
Location: Los Anglels, United States
Registered: 1 Sep 2007
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Re: Spring Breakup with Samyang fisheye
Posted: 19 Mar 2010 at 22:47 GMT
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Judy,
You need to tilt up a little more or take a separate Zenith shot. You can clearly see the area where all your pictures come together at the top. Otherwise, looking good.
Dennis
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Mark Schuster
Posts: 1319
Location: Welwyn Garden City, United Kingdom
Registered: 25 Jan 2006
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Re: Spring Breakup with Samyang fisheye
Posted: 19 Mar 2010 at 23:12 GMT
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Judy,
You are not supposed to do things so well the first time. It's embarrassing. 
Keep up the good work!
Mark
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Judy-A
Posts: 505
Location: Edmonton, Canada
Registered: 20 Jan 2010
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Re: Spring Breakup with Samyang fisheye
Posted: 20 Mar 2010 at 0:06 GMT
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DennisS said: Judy,
You need to tilt up a little more or take a separate Zenith shot. You can clearly see the area where all your pictures come together at the top. Otherwise, looking good.
Dennis
Hmm. You’re so right, Dennis. The zeniths do show on both images. I hadn’t even thought to inspect them! However, I did include zenith images that covered those spots.
My badly-aligned hand-held nadir images were pulling the panos out of alignment in AutoPano Pro, so I deleted them and re-optimized, then cropped to 360x180. I noticed a gap at the top of the pano preview window. However, the sky reached the top of the rendered image.
Here’s a screenshot of the APP window for the beaver dam pano, zenith image outlined in yellow.
I sharpened the images after stitching. Could that cause this problem?
Judy
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John Houghton
Posts: 3412
Location: Hitchin, United Kingdom
Registered: 17 Jan 2005
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Re: Spring Breakup with Samyang fisheye
Posted: 20 Mar 2010 at 6:52 GMT
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Judy-A said: I noticed a gap at the top of the pano preview window. However, the sky reached the top of the rendered image.
You probably need to go to Edit->Settings->Panorama and set the Preferred Projection to Spherical and the Preferred Extend to Maximum Projection Range. (Do this before starting your project). This will ensure that you are able to render a full 360x180 that includes the zenith hole. Otherwise, zenith and nadir holes will be automatically cropped away.
John
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mediavets
Posts: 1948
Location: Isleham, Cambs., United Kingdom
Registered: 8 Feb 2008
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Re: Spring Breakup with Samyang fisheye
Posted: 20 Mar 2010 at 8:18 GMT
updated: 20 Mar 2010 at 8:21 GMT
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Judy-A said: I noticed a gap at the top of the pano preview window.
Judy
That's just an 'anomaly' of APP/APG preview in the Panorama Editor you do in fact have image data there.
By all means prove it by doing what John suggests then use the Yaw/Pitch/Roll control to set the zenith at the 0/0 position and you'll see there's no zenith 'hole' despite the apparent 'gap'.
Andrew
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Smooth
Posts: 3729
Location: Mount Panorama, Australia
Registered: 21 Jul 2004
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Re: Spring Breakup with Samyang fisheye
Posted: 20 Mar 2010 at 8:29 GMT
updated: 20 Mar 2010 at 8:29 GMT
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DennisS said: Judy,
You need to tilt up a little more or take a separate Zenith shot. You can clearly see the area where all your pictures come together at the top. Otherwise, looking good.
Dennis
I don't think what you are seeing has anything to do with the zenith shot or needing to tilt further. The "pinching" effect is the fault of the software (or the setting being used). The zenith shot would have covered this area, so it can only be the software. It could be something Smartblend is causing.
Regards, Smooth 
www.smooth360.info
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Judy-A
Posts: 505
Location: Edmonton, Canada
Registered: 20 Jan 2010
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Re: Spring Breakup with Samyang fisheye
Posted: 20 Mar 2010 at 17:40 GMT
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John, I had the projection set at spherical, cropped to Full Sphere: 360x180. As Andrew suggests, when I pull the zenith into the center of the APP preview window, there is no gap in the sky.
These panos were an exercise to see how few images from the Samyang would give good stitching results. I had taken more shots.
When I stitch eight shots around plus two zenith images, there is no pinching.
When I stitch four shots around plus and alternate zenith image, there is no pinching.
Smooth, I think you’re right that this may be a Smartblend issue.
Thanks for all the helpful comments.
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