PanoTools NG:
Re: Aiptek A-HD+ mini fisheye camera mod
panovrx 2009-Apr-05 10:00:50
--- In #removed#, RomualdV <vromuald@...> wrote:
>
>
> Le 3 avr. 09 ?8:01, panovrx a ?it :
>
> > . an Aiptek A-HD+ hybrid camera and it came this morning and I
> > replaced the lens with the fisheye lens from the GoPro Hero Wide --
> > here is a still
> > http://www.mediavr.com/aiptek1.jpg
>
> Sharper in the corners than in the center in this sample, as you set
> it or it is a fov/distance effect...
>
> Romuald
>
Yes I set it too close -- with these mini fisheye lenses with fixed (maximum) apertures you need to focus carefully. The Aiptek camera has 4X digital zoom so that helps but it is hard to see the screen detail in bright light.
Here is another still with it (5M default)
http://www.mediavr.com/aiptek2.jpg
with the Sunex DSL219A 1.8mm fisheye
http://www.optics-online.com/OOL/DSL/DSL219.PDF
... and the coverage is about 185 by 140 I think ... like a shaved 10.5mm on full frame.
There is no manual exposure with the Aiptek but the exposure compensation reveals more detail in bright and dark areas so the sensor has actually a quite wide dynamic range. So you could at a pinch shoot panoramas with it. Here is a video showing the low light response with this lens fitted (it has f2 aperture). This is 60fps 720p.
www.mediavr.com/helimodel.mov (16M)
There are quite a few shots of dismanted Aiptek A-HD+ cameras online but it is a bit harder to modify I think than the Logitech Notebook Pro webcam and Gopro Hero Wide which I have retrofitted fisheye lenses to too also. The main issue is the M12 lens mount of the Aiptek which is custom for this camera and is better replaced with a more conventional M12 mount. Which I did. I would rate the difficulty of fitting prime fisheyes to this 5 out of 10, compared with the GoPro 3 out of 10 and the webcam 2.
Peter M
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