Top positive review
Only solution for a grubby lens
16 January 2013
Let's face it, lenses are a pain. Proper photographic ones cost a bomb and anyone protecting their investment puts on an ND or UV filter. The problem is that then you end up with a filter that needs cleaning, particularly if you've been near the ocean.
ROR is about the only thing you can use. I experimented on an old lens, and although sinful to the photographic community (look away now) started with neat washing-up liquid as it was that oily. It worked, but it was impossible (even under a tap) to then truly clean the washing-up liquid from the lens, I'd swapped one chemical for another. I even tried using a hair dryer to air-dry the lens without touching it, and it still left residue.
After research I got some lens cleaning paper (an equally weird almost tissue paper type lint free thing that your gut would say wouldn't work) and ROR. Used the bare minimum as recommended and it completely solved the problem. I should of done it in the first place, but was reluctant to spend 10% of the cost of a filter on the cleaning kit, for cheaper filters the ratio would be higher.
Some people say that ROR is just soapy water and I understand where they're coming from in that it has a similar appearance, but from my own experimentation I'd say 100% it's not as it dries streak free and that was impossible with the other option.
That said, due to the micro-coatings on a filter (or lens), I wouldn't be cleaning like this every day, but periodically there are things on a filter/lens you just can't shift and for those, there's nothing better than ROR. Keep it to hand with lens paper.