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[QUOTE=mura_gadi;1522464]Hello,
Try looking for "Gerd Neumann (jr)" products, there are 10L/mm for 250 per inch for around 35euro, 5L/mm as well, but can be a little more expensive, $55euro.
Thank you for the link. I got the 10L/mm and it's coming. Reading about testing most people use closer to 5L/mm. Being a skinflint, I bought the cheaper one. I'll see how it goes.
I am nowhere near testing. At the this time, I am building a turntable for grinding and polishing. I thought I needed a flat mirror for the auto collimation test as is written on the Stellafane site. Now I know I don't need a glass mirror. Too late. Got most of the stuff for the turntable.
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