Re: [APML] (OT) IC1396 CCD with Schmidt-like FOV

[Chris1011@aol.com]

In a message dated 8/6/2002 11:45:06 AM Central Daylight Time, joneil@multiboard.com writes:


> Technically, there are camera lenses in AP quality, IMO, but you 
> are also paying AP prices (or greater) too.  For example, I read on another 
> photo mailing list a couple years ago about a specialty lens Nikon made 
> (105mm I think?) that was apparently fully apochromatic, not only in the 
> three visible light, but also into either UV or IR by a coupel hundred 
> anaonmeters, so you could say it was a  colour crossing lens


That's really not the point. The point is that an astronomical quality objective should produce very tight star images approaching theoretical Airy Disc size at full aperture. This would fully utilize the small pixel size of the ST10 chip. I would bet that the best Nikon lenses do not produce 1/4 wave images on axis at full aperture. Sure, you can stop them down, but then you are making the aperture the size of a binocular lens.

Roland Christen

Roland Christen