Re: [ATM] webcam question

["Bob May" <bobmay@nethere.com>]

Focusing with a webcam can be fun as it is more critical.  You
also need to look at the camera's images of normal things to see
how good the focus can be with it.  The pixel size is really
quite small and longer focal length telescopes will often not
produce a spot that is smaller than a single pixel but rather
occupy several pixels.
If you have any refractive optics in the light path, you will
find that you will never get a good focus because refractive
optics does have a problem with focusing all of the light to one
spot with the infrared (where the camera is really snesitive!) to
the UV bening a complex curve of wavelength vs. focus point.
Bob May
bobmay at nethere.com
http: slash /nav.to slash bobmay
http: slash /bobmay dot astronomy.net
Addresses have been munged tp lee[ spammers from bothering me.
replace the obvious words with the proper character.
Thank you for your understanding!

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