Re: [ATM] Determining the focal length of a negative meniscus lens.

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

The focal length formula (1/Fr = 1/F1 - 1.F2) formula still works
correctly.One of the focal lengths will be negative so the end
result will be negative.
Take a positive lens and find it's focal points and then insert
the negative lens in and see what the change of the one point of
the positive lens is and the two distances from the negative lens
to the old and new focal points is the numbers to use.
Bob May
bobmay at nethere.com
http: slash /nav.to slash bobmay
http: slash /bobmay dot astronomy.net
Addresses have been munged up to keep spammers from bothering me.
replace the obvious words with the proper character.
Thank you for your understanding!

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