Sigma 8mm Fisheye Canon 350D MrotatorCP
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** set approximate pitch (thank you Luca for the great idea of orienting the camera slightly up, giving better coverage of the zenith) | ** set approximate pitch (thank you Luca for the great idea of orienting the camera slightly up, giving better coverage of the zenith) | ||
* set control points (i add at least two vertical lines) | * set control points (i add at least two vertical lines) | ||
| − | * first advanced optimizer run: | + | * first advanced optimizer run: optimize for pitch only on all images, including anchor image, linked (the camera is slightly tilted upwards on the MrotatorC and the angle can not be precisely measured) |
| − | + | * second optimizer run: if necessary, optimize a second time for all parameters | |
| − | + | ||
| − | + | ||
| − | * second | + | |
* blend and stitch, serve hot with either a Java applet or QuickTime | * blend and stitch, serve hot with either a Java applet or QuickTime | ||
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==Notes== | ==Notes== | ||
* the above process works with my guinea pig, a little 5x5 (1.50mx1.50m) shower/wc room, as well as with some larger rooms. | * the above process works with my guinea pig, a little 5x5 (1.50mx1.50m) shower/wc room, as well as with some larger rooms. | ||
| − | |||
* Hypothesis: since the entry point of the lens changes with the angle, for a perfect, uncorrected stitch exact slices should be used, like an orange. To be verified. | * Hypothesis: since the entry point of the lens changes with the angle, for a perfect, uncorrected stitch exact slices should be used, like an orange. To be verified. | ||
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* [http://michel.thoby.free.fr/SIGMA8mm/Alpha%20test%20300D/Nodal%20point%20of%20SIGMA%208mm.html Michel Thoby has studied the Sigma 8mm in detail] | * [http://michel.thoby.free.fr/SIGMA8mm/Alpha%20test%20300D/Nodal%20point%20of%20SIGMA%208mm.html Michel Thoby has studied the Sigma 8mm in detail] | ||
* [http://www.agnos.com/catalogo.htm?v_lingua=ITA&v_iss_web=0000000000000007345831040253&v_categ_lista=PR001-00007&v_cod_art_sche=MROTATORC Agnos MrotatorC] | * [http://www.agnos.com/catalogo.htm?v_lingua=ITA&v_iss_web=0000000000000007345831040253&v_categ_lista=PR001-00007&v_cod_art_sche=MROTATORC Agnos MrotatorC] | ||
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| + | [[Category:Tutorial:Basic need]] | ||
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| + | {{Outdated}} | ||
Latest revision as of 23:53, 21 September 2008
Contents |
[edit] Setup
- Sigma 8mm f/4
- Canon 350D
- Agnos MrotatorCP
[edit] Shooting
- With the above combination I can shoot a panorama in either six or three shots with yaws of 60 or 120 degrees respectively.
- For the three shots process, position the camera 4mm backward in relation to its calibrated position for the six shots process.
- If your aim is the three shots process (a time winner for cheap real-estate service), you will be better served with a Nikon D70 for which the MrotatorC was originally designed. It has a larger sensor, which gives you more overlap. The overlap of the images with the Canon 350D is extremely small.
[edit] Process
The process that works for me (with PTgui):
- import source images
- set approximate lens settings
- set panorama settings
- the crop is automatically good
- set image parameters
- distribute images by yaw (thank you Joost for the Fill yaw function!)
- roll all images -60 (the Agnos MrotatorC holds the camera at 60 degrees to use as much possible of the sensor surface)
- set approximate pitch (thank you Luca for the great idea of orienting the camera slightly up, giving better coverage of the zenith)
- set control points (i add at least two vertical lines)
- first advanced optimizer run: optimize for pitch only on all images, including anchor image, linked (the camera is slightly tilted upwards on the MrotatorC and the angle can not be precisely measured)
- second optimizer run: if necessary, optimize a second time for all parameters
- blend and stitch, serve hot with either a Java applet or QuickTime
[edit] Lens Parameters
Can be stored in PTgui's lens database
- lens type: circular
- HFOV 182.772
- a: -0.07611
- b: 0.003985
- c: -0.041765
- d: 0
- e: 0
- g: 0
- t: 0
[edit] Notes
- the above process works with my guinea pig, a little 5x5 (1.50mx1.50m) shower/wc room, as well as with some larger rooms.
- Hypothesis: since the entry point of the lens changes with the angle, for a perfect, uncorrected stitch exact slices should be used, like an orange. To be verified.
