[Cameramakers] Quality of eyeglass 'diopter' type glass lens elements

Hello: Any opinions on spherical aberration or other concerns with the glass up-to-80mm diameter lenses I can buy from my helpful local optician? I haven't begun to think about coating issues... Thanks Murray ___ Cameramakers mailing list [EMAIL

[Cameramakers] Ilex #1 synchro electronic shutter question

Any place to find data, wiring, history of problems ? (Ilex #1 electronic shutter) Thanks Murray ___ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers

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[Cameramakers] Re:DIY lens design

Here is a link to an Amateur Telescopr Makers site on eyepiece construction. Basically just a short focal lenght lens. Edmund Scientific Co used to publish pamplets on lens design using simple lens. Hope this is some help. Thanks Ed Shelton http://earth.vol.com/~lifedata/eibasic.htmon