Motorized multishooting device for taking the frame sets!
Dear 3D Friend,
You know 3D lenticular photos must be done from many pictures of subject taken from different angles. The best quality of 3D lenticular picture could be reached if you use as many frames as your printer can print. For example, if you want to create 3D photo using 40 lpi (lenticules per inch) lens and the resolution of your printer is 720 dpi (dots per inch), so you can use up to 18 frames:
720 : 40 = 18
But if you use 20 lpi lenticular sheet it's good idea to use 36 frames:
720 : 20 = 36
In that way the main problem of 3D shooting is making a good sequences of frames. The key requirements to the frame sets are:
- Sufficient amount of frames.
- The subjects in scene must be motionless and illumination of scene must be equal during shooting period. In other words, it is good idea to decrease period of shooting as short as possible.
- The frames do not have to be inclined to each other. In other words, device has to be stable and rigid enough.
Before we used Tripod Add-on that was developed by Georg Mainow from Germany. That is good device, but it has some weaknesses. For example, amount of frames are limited by 12 and period of shooting starts from 90 seconds and longer, because we have to move the camera manually and stop it before each shot. You see that it is useful for shooting just motionless subjects. But this device is not good for shooting the subjects that are moving during shooting period. The most disappointing thing is it's useless for taking the portraits. Unfortunately that is impossible to take the portraits even if a person makes an effort not to move, since at least the chest is moving anyway because of breathing and the eyes are moving because of winking. That is a biggest disadvantage of using the Tripod Add-on because all photographers know that portraits are most popular and profitable photos.
We researched different ways to resolve these problems and we realized that this device has to be motorized to move the camera with a steady and fast enough speed. Moreover the camera must capture the frames fast, with nice quality, and amount of frames must be big enough for lenticular technology, in other words at least 20 frames. Fortunately the best modern digital cameras can capture in burst mode with the speed as many as 8 frames per second and capture up to 30 and even more frames. For example, a digital camera Nikon D200 can shoot 57 frames with the speed of 5 frames per second. That means 25 frames could be shot during just 5 seconds. But period of 5 seconds to stay motionless for people is not a big problem. That means it's possible to use such device for shooting even 3D portraits!
If you read carefully our information you could notice that last year friend of mine, Georg Mainow, and me taken 3D pictures using Motorized Multishooting Devices. That is because we developed and made two such devices. You could see the pictures that were made using them here: Erotic gallery, "Guitarist", "Natasha", "The Early Fall" and some other pictures. As you could see these pictures consist of from 26 to 50 frames. We tested this idea and our multishooting devices a lot and found these devices prove themselves as extremely useful for shooting the frames sequences for 3D lenticular photography. Please, see an appearance of Motorized Multishooting Device on pictures 1 and 2.
You can see on pictures that it is not simple device. Let's briefly review the main features of Motorized Multishooting Device.
Two multishooting methods
Motorized Multishooting Device is the only device that can take the frames in two ways:
- Parallel multi shooting method.
- Convergence multi shooting method.
Parallel multishooting method
If you use parallel multishooting method your camera moves perpendicular to photographic scene. It is the simplest method which gives very nice results (picture 3).
But it is necessary to note, that since the aiming lines move parallel, a part of the photographic scene to the left and to the right is going to be lost. During shooting it is necessary to keep in mind that the main subject should always be within the limits of the frame's working area (picture 4).
At picture 4 you can see the orchid. At first frame an orchid is close to the right side of frame, at tenth frame it is close to the left side. Hence the left part of first frame, the right part of tenth frame and some left and right parts of all intermediate frames will be lost. That is the biggest disadvantage of that method of shooting. The part of graphic information at each frame, sometimes up to 50%, will be lost.
Convergence multishooting method
If you use convergence multishooting method your camera moves around subject along arch. The camera is aimed at subject (picture 5).
Advantage of this method is you can use whole graphic information of your frames. Disadvantage of this method creates some graphic distortion especially along the edges of the frames.
If you want to ask me "What method is the best for multishooting?" I can not tell you for certain because both methods are good for some scenes. We showed the pictures made by both methods to people and asked them what picture is the best for viewing. And we realized that many people do not see and differences, but some people in some reasons prefer to see the pictures made using "Convergence multishooting method". That is why we developed device that could be used for multishooting by both methods. This gives you more flexibility to make 3D lenticular pictures using both methods, and select the best picture.
Read about other features of Motorized Multishooting Device below:
- Stereobase - from 0 to 65 cm.
- Ability to measure a stereobase using metallic ruler.
- You can select the speed of moving camera smoothly. The speed is variable from 0 to 20 cm/sec.
- Ability to change rotation radius from "zero" to "infinity" (picture 5). When you change a rotation radius to "infinity" that means that you use "parallel multishooting method".
- Firm, stable construction.
- Automatic switching off the motor when the camera arrives at left or right ends of device.
- Changing the direction of camera's moving.
- Ability to work using the regular alternating current with voltage from 110 to 220 volts.
- Operating direct voltage - 24 volts (ability to work with voltage from 18 to 24 volts).
- Size - 76.5 x 75 x 41 cm.
- Wheight - about 5 kg.
Please, see some other pictures of Motorized Multishooting Device.
Picture 6. Rear view.
Picture 7. Control device.
Picture 8. Slide assembly.
Picture 9. Slide assembly.
You can see that camera could be attached to "Slide assembly" easily. Moreover the camera could be easily inclined for choosing the best composition of scene without inclining of whole device.
Below you could see the unit for changing the Rotation Radius (picture 10).
The camera is moving on the arch (picture 11).
On picture 12 you could see the power supply that transforms alternating current with voltage from 110 to 220 volts to direct voltage of 24 volts. This power supply could be connected to wall outlet using standard computer power cable. That means that if you live in country where are used other plugs than in Europe, all you need is to go to the nearest computer shop and buy standard computer power cable.
If you are technical guy you could make additional power supply with rechargeable battery with 18 volts from electrical drill. That gives you a possibility to take the pictures at any places where you can not find the wall outlets.
In next article I am going to tell you about using of Motorized Multishooting Device in practice. If you have any questions regarding this device please do not hesitate to ask me .
"3D PhotoPro" is a trademark of 3D Photo Productions.