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| RE: RE: RE: I Need Help Identifying Glass!
Forum List | Follow Ups | Post Message | Back to Thread Topics | In Response To Posted by Robert May on August 4, 2000 16:11:48 UTC |
Now that you have the numbers for Red (C line), get them for yellow (D line) and green (e line) and you will be able to plug them in and get the Vd values which will shrink the variables. For a quickie, if you vary the radiuses in porportion, you will keep the basic prescription but lengthen the focal length. |
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