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Re: [ATM] 4" objective !

Saqib Sajjad wrote:

>thanks for the info. the vendor i found can make a double convex lens too.
>can you please tell me if i use a crown glass made double convex lens (4")
>with focal length of 1000mm then what should be the focal length of flint
>negitive lens,what should be its size and how apart should they be. i will
>be thankful if you can point me to the formula/website to calculate
>this.any help in this regard will highly be appreciated.
>
>
>Saqib
>
You could try:

    http://users.rcn.com/rflrs/GeeWyld1_5_0.jar
    http://users.rcn.com/rflrs/GeeWyld1_4_2.jar

depending on the version of Java you have.  Instructions are in:

    http://users.rcn.com/rflrs/GeeWyldUM.htm

Beyond that, I can try to answer some of your questions, too.
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