Anyone use these with good results? I got some today off of ebay and paid £10 for a set of +1, +2, +4 and +10 filters.
Just wondered if anybody had any tips on how to get the best out of them, if that's not a strange question.
I've never used them before and did have difficulty focusing with a couple of the lower magnification ones, so I just ended up using the +10 filter.