Originally Posted by
LabRat
The fresnel is needed for proper spacing of the gg, as it goes on the inside (toward lens, with the grooved side towards lens) or it will not focus correctly... The grainy side of gg goes toward lens side, and smooth glass side goes out back...
If you want to mark lines on gg, get a hard lead drafting/drawing pencil with a sharp point, and take drawing & measuring tools to lay it out... If you make a mistake, just wash it off grainy side of gg...
You shouldn't be able to see the fresnel lines through gg, as it is on the inside of gg...
A good wash of the gg should help lighten up image slightly...
Steve K
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