Whole flower pictures would help if you're looking for harvest advice vs only looking at trichome color. J
Most here probably wouldn't like my answer to you on this but I'll say it anyhow - I don't own a scope nor do I plan on buying one so I'm not sure what an amber trichome looks like besides seeing the pictures online. I watch my flowers, the color of the pistils, the thickness of the calyxes and simply through experience of doing this a long time, by visually looking at them, watching them, knowing how much they drink, knowing the strains I grow over time I just know when they can't possibly get any better - Then I wait another week. J