41313Re: spherical mirror
- May 2, 2010Am 02.05.2010 21:12, schrieb _kfj:
> But: it costs a lot of money and/or has chromatic aberration (atWrong. A Samyang, a Zenitar or a Peleng are relatively cheap. The
> least on the edges).
Samyang is very good:
> So I was wondering about spherical mirrors. They... except what's behind the camera and what's behind the mirror. In
> ought to be able to produce images of almost the whole field of view
practice the distortion near the mirrors edge is so high you won't get
usable image data there. Hence the vertical FoV is limited to about 120°
> and have no CA,The mirrors not, but you still need a lens to shoot them, which still
might have CA. Mirrors have other drawbacks: They don't reflect 100% of
the ligth, any dust speck or finger print will be visible in the image,
hence the dynamic range is limited. In short: nothing for serious work.
> be lightweight and potentially even cheap! Has anyoneIn addition to what Uri wrote: You can order single spherical lenses
> out there used one (or is there a ready-made spherical-mirror-lens
> around)? And where could one find optical grade spherical mirrors if
> there are no ready-made lenses?
f.e. from http://www.linos.com and let them coat it. I asked some years
agon and if I remember correctly the price was below 100 euros.
> How does one go about getting theEither you cut the camera out later or need to shoot from two different
> view and not an image of oneself when using a spherical mirror? Maybe
> there are alternatives which aren't spherical but some other convex,
> maybe pointed, shape?
directions and stitch the result.
Some years ago Uwe "hammernocker" Roßberg made a mirror for himself and
shot some panoramas: http://www.hammernocker.de/panorama.php (choose a
category on the left side).
You'll probably agree that this is mainly for fun and not for serious
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