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Author Comment Last activity Moderation
mathew "I would go after a test from the dept. of ag in maine. the university of maine has a great how-to. Lead is a standard on the test but I'll bet th..." | Read more » almost 10 years ago
donblair "Great note! I'm just going to paste in some of the comments from our email thread here, for reference: "Note in this photo comparison the expansi..." | Read more » almost 10 years ago
cfastie "All three of those filters will probably be good replacements for Wratten 25. Doing some tests with them is the only way to tell, and I suspect it ..." | Read more » almost 10 years ago