I am a photographer on a semi-pro basis. It is not my main job by any means, but I do rent my photography services out on a part-time basis. More importantly, photography is my main hobby and I really enjoy being creative in the way the photography allows me to be. Something I've learnt over the years is the importance of ensuring that my lenses are kept scrupulously clean and streak free because the smallest blemish on a lens can actually ruin an otherwise perfect photo. I have tried a number of optics cleaners and optics cleaner accessories, including ROR Optics Cleaner. The ROR acronym stands for "Residual Oil Remover" and the idea behind this specific type of lens cleaner is that as well as being a general optics cleaner, it also removes any oil from the lens that may be there as the result of environmental pollution or fingerprints. By removing any oil residues, every day dust effectively has nothing to stick too - and therefore the lenses are rendered cleaner and brighter.
The ROR Optics Cleaner comes in a 30 ml plastic bottle with a dropper for you to drip a couple of drops of the cleaner onto the surface of the lens. This bottle costs £4.99 from Warehouse Express, which I feel is a good price as it lasts ages. I probably go through one bottle of lens cleaner every two months. I mostly use it on my camera lenses, but I also use it on my iPhone screen and my laptop screen.
In order to use, you just drop some drops on the surface that you're wanting to clean. On my iPhone I use just one drop, on my laptop screen I may use 3 drops and on my camera lenses I use 2 - 3 drops depending on how grubby they are. Once dropped, I use a lint free cloth to wipe over the surface in a circular motion. It dries actually as I am wiping it and after a few wipes it is completely dry, clean and streak free. Once cleaned, I would say that using this solution keeps the lenses clear for about 50% longer than using other optics cleaners I have used - and that means less cleaning.
Overall, I think this product is easy to use on a variety of optical surfaces - and it is effective at cleaning and removing dust and grease. Occassionally, on my lenses, I may been to repeat the cleaning process twice - but this has been true of any cleaning fluid I have used.
At the camera shop I work in we sell some camera cleaning equipment, there are a couple of lens cleaning fluids we sell - ROR is the main one and quite frankly the best.
ROR stands for Residual Oil Remover and it's intended to remove oily marks from glass optics such as camera lenses, filters and reading glasses etc. Although there are other glass cleaners on the market which come in bigger quantities for a lower price, they can damage the coatings put on certain glass optics - this particular cleaner is safe for such purposes and will remove marks without damaging the glass or any coatings on it.
This particular ROR comes in a pump bottle containing 20 fluid oz - the stock photo is an older one and the current bottle has a white pump top. ROR is printed in big letters on the side and there is smaller text with a list of products it's suitable to use on etc. The pump is easy to use and you don't need to exert much pressure to get a spray out of it - this comes out in a fine mist and the nozzle doesn't clog up with use. You can also purchase ROR in a smaller dropper bottle.
Only a small amount of fluid is needed to clean a bit of glass (a single small pump for the glass of a lens) so the bottle lasts a long time. When you wipe the fluid across the surface with an appropriate cloth it quickly and easily removes any oily marks with little pressure applied and as long as you haven't over saturated the glass, it dries off very quickly to leave a streak free finish.
I'd never heard of ROR before I started working in a camera shop, even though I have a degree in photography, but since I've bought a bottle I haven't looked back. While being careful with your equipment should usually prevent bad marks on glass, ultimately you'll get some oily smudges such as when you accidentally touch the front element with your fingers. I've also found that ROR is excellent to use for removing other marks such as dust particles - using this has helped make my lenses look like new again as it leaves the glass looking perfectly clear and streak free.
Price wise this can be purchased for around £8 per bottle, which may seem like quite alot for the amount you get - however as you only need to use a very small amount each time, it lasts for ages and is very effective so it's definately worth the price it commands.
Over all I highly recommend this product for any photographers, cinematographers or people with glass items that are prone to oily marks.