Creating videos in native Fisheye
The tool we recommend is the Canon
EOS 5D Mark III for two reasons:
The first is that with the addition
of a target circle 8mm Fisheye obtained in full and that this circle allows
the realization of Domemasters in 3744x3744 pixels²
There is the opportunity to provide
content for big digital planetariums.
The second is that it can make movies
The only problem is that the 8mm
Fisheye just covers the 24x36 format (3/2) and not (16/9) for which a portion
of the image 3 / 2 is truncated at the top and bottom to fit that format
Consequence: In 1080x1080, movies
will only show a circle of 160° and if you stretch to get 180°, you'll
loose some parts in north and south position as the full 180° would integrate
1280 pixels. If you use a WUXGA projector, you will get in native something
good if you accept of loosing some 96 pixels at north and south position.
Not too disturbing...
CANON EOS 5DMarkII
Sigma 8mm F/D=3,5
Exposure 30s - 6400ISO
Télescope de FOUCAULT
D=80cm (année 1864)
Sigma 8mm F/D=3,5
Timelapse composited made in august
2009 in Chile by Lionel RUIZ.
Fisheye format 1200x1200
It shows the circumpolar rotation
of stars around the south pole from Ovalle in Chile (30°S).
Creating videos with raytracing tools
For this, the latest version of
the raytracing software BLENDER
can manage things with specific add-ons (fisheye projection). As it's a
free open source tool, it'll soon become the best in the world with an
increasing number of users, especially in the world of planetarists.
To study some examples, I recommend
using this blender source code: Clockwork
Even if it is expensive, I use C4D
for the video renders that you'll be able to find on this website. There
are 3 possibilities to produce domemasters with this tool:
1) No fisheye render.
You can use a 5 cameras rig at 90°
each covering a cube and stitch the resulting images using GLOM from Spitz.
A free software you can download from their website:
2) Spherical mirror trick
Using a reflecting half sphere and
looking at it from a camera can make the trick but not a real fisheye distorsion
and I completely abandonned using it
This is what I use most of the time
when I can, it's a cheap plugin from:
I know the guy who made it and I
have talked with him many times during IPS meetings and other related events.
The only drawback is that sometime it crashes if you are within many pyrocluster
renders but most of the time it is ok. Also, if you use visible lights
(that are rendered in a second calculation) it doesn't work. In these cases,
I use the 1) option even if it is longer to adjust.