Forum:
Q & A
Thread:
Finding nodal point in the field
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Re: Finding nodal point in the field
Posted: 13 May 2012 at 17:38 GMT
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Look inside the lens, where the iris appears to be, there's your entrance pupil. Accurate enough method for most situations.
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Forum:
Q & A
Thread:
Maximum angle for rectilinear projections
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Re: Maximum angle for rectilinear projections
Posted: 29 Apr 2012 at 8:25 GMT
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Panini is Vedutismo. There's two variants of said projection in Hugin, General Panini and Equirectangular Panini. Former is adjustable which is very handy.
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Forum:
Q & A
Thread:
Batch Process Question
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Re: Batch Process Question
Posted: 29 Mar 2012 at 15:29 GMT
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The seam lines are shifting, if you're using Enblend you can disable optimizition of the seam lines (so they stay identical from picture to picture) with the --no-optimize command.
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Forum:
Q & A
Thread:
Cheaper alternative to Nodal Ninja?
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Forum:
Q & A
Thread:
Accurate bearings?
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Re: Accurate bearings?
Posted: 22 Jan 2012 at 12:04 GMT
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The entrance pupil will move as you focus closer and closer. The longer the lens, the bigger the movement of the entrance pupil is. So you either have parallax in the foreground or in the background unless you recalibrate the head for every time refocusing.
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Forum:
Q & A
Thread:
Hi! Some pointers please
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Re: Hi! Some pointers please
Posted: 19 Jan 2012 at 19:21 GMT
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Unless you are shooting inside a shoe, half a millimeter accuracy in nodal point adjustment is overkill.
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Forum:
Q & A
Thread:
Phottix Aion
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Forum:
Galleries
Thread:
Show some of your best NEW YEARS Panos!
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Forum:
Q & A
Thread:
Panorama Distortion Correction?
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Forum:
Q & A
Thread:
HDR panorama with hugin
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Re: HDR panorama with hugin
Posted: 20 Nov 2011 at 9:55 GMT
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AFAIK the OpenEXR libraries are broken 64bit Windows resulting in these empty files. You can output exposure layers and use some other software HDR merging such as Luminance HDR. When using exposure layers remember to set --no-optimize in Enblend options in Hugin's stitcher tab, this way the seam lines are the same in all layers.
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Forum:
Galleries
Thread:
Panoramic head
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Forum:
Q & A
Thread:
Why switch from photomerge to Ptgui/hugin/autopano
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Re: Why switch from photomerge to Ptgui/hugin/autopano
Posted: 20 Oct 2011 at 15:05 GMT
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Well, Hugin can automatically blend exposures using Enfuse when using the stitching assistant. And from the preview one can level the pano (which Photomerge can't do at all AFAIK) and use different projections than the normal rectilinear or two cylindrical projections.
I suggest you try the Panini projection, it keeps the sense of perspective that is lost in most scenes when using cylindrical projection.
Examples:
(the beams would be curved in cylindrical projection and the photographer distorted in rectilinear, Panini avoided both problems)
(This looked 'flat' in cylindrical projection, the image is approx. 160 degrees wide)
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Forum:
Tips & Tricks
Thread:
Comprehensive tutorial: Creating Panoramas, The Open Source Way
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Forum:
Q & A
Thread:
Phottix Remote
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Re: Phottix Remote
Posted: 14 Oct 2011 at 19:18 GMT
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I thought it was a camera feature that the shooting stops once the bracket is done.
Anyway, currently I have this remote: www.pixelhk.com/Proshow.aspx?id=78 (Pixel RW221TX) and I like since it uses normal AAA batteries. It also has handy feature for night shooting: the front LED is blinking one, not continuous - the remote doesn't ruin your images with unwanted light.
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Forum:
Q & A
Thread:
Samyang 8mm wide aperture tests
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Re: Samyang 8mm wide aperture tests
Posted: 4 Oct 2011 at 16:53 GMT
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Judy Mentioned Tokina 11-16mm f2.8. I have one of those and I just shot series of images at different apertures.
Here's the lower left corner (well not the extreme corner since there was nothing there worth seeing, but close):
100% crop from the center, I can't tell the images apart sharpness-wise:
Here's the corner again, now remapped to same angular resolution as the image center as is the case with spherical panoramas:
Chromatic aberration (RawTherapee's automagic correction) and vignetting (with flat field image) were both corrected and exposure was equalized between images (there's slight tendency for overexposure wide open, about one third of a stop). Of course this lens is no fisheye, so lot images are needed if spherical panorama is the goal of shooting, but in low light the IQ is peerless.
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