Could ROR Fluid Damage B+W Multicoated Filters? Could Cooking Oil?

[Certain Exposures]

Do you use ROR fluid on your B+W MRC filters without any issues?

Some grease found its way onto my B+W MRC Yellow filter. I sprayed a liberal dose of ROR fluid onto it, gently rubbed it in a circular motion with a clean microfiber cloth, and watched in horror as the filter developed a greasy haze on its surface that would not go away. Also, some of the filter's coating looks spotty or less yellow now.

The grease could be cooking oil. I think a wayward or curious finger touched the filter's surface during the holidays. I am thankful the same grease is not on the lens.

This is difficult to show on photographs:





P.s. I've used B+W's contact page to ask a technical question a few times over the years. They've never replied. Have you ever heard back from them?

 

[mshchem]

I use a clean cotton undershirt, apply the ROR to the cloth. Then clean your optic. You have liberated assembly oil from the internal threads of the filter. Be careful to use least amount. You shouldn't have trouble cleaning up your filter, those are the best and most durable.

 

[wiltw]

ROR ingrediants:

• ammonia
• sodium chloride (essentially table salt)
• Isopropyl alcohol
• liquid soap
• distilled water

in short, No

 

[Dan Daniel]

Depending on the oil type, you might use a specific solvent to dissolve it initially. Fat and skin oils, alcohol. Petroleum based oil, naphtha. After this, then do a final cleaning with something like ROR.

 

[RalphLambrecht]

filters can indeed bedamaged by cleaning fluids,especially those which are manufactured by sandwiching a coloredgelatin layerbetween two sheets of glas. The capillary action will allow the fluid to come into contact with the gelatin and harm it. the multicoated glas surfaces,on the other hand, are not sensitive to optical cleaning fluids. Having said that, your technique may need improvement. Never spray cleaning fluid directly on lenses or filters! Use a clean cotton rag andpray a little cleaning fluid on that and then clean the filter or lens with that!

 

[loccdor]

The Zeiss lens tissues work well for final touches on filters.

 

[RalphLambrecht]

I'm sure it does also.

 

[Milpool]

ROR won’t do damage - especially to the MRC coating.