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darkstar2004 · 02/27/08, 03:18 AM

I have heard that what looks like oil on aperture blades is actually a result of the lens being exposed to excessive heat.

The lubricant used on aperture blades is not an oil but a dry lunricant and it changes state and looks like oil due to excessive heat exposure. Lenses with this condition need to be CLA'ed and re-lubricated.

This may be true or it may be hogwash - it's just what I have heard (I haven't called Leica to ask the service dept.)

Does anyone know if this is true or not?

02/27/08, 03:18 AM	#6 (permalink)
darkstar2004 Erfahrener Benutzer Join Date: 04/28/04 Location: USA Posts: 322	Re: Oily aperture blades I have heard that what looks like oil on aperture blades is actually a result of the lens being exposed to excessive heat. The lubricant used on aperture blades is not an oil but a dry lunricant and it changes state and looks like oil due to excessive heat exposure. Lenses with this condition need to be CLA'ed and re-lubricated. This may be true or it may be hogwash - it's just what I have heard (I haven't called Leica to ask the service dept.) Does anyone know if this is true or not? __________________ "Compensating for lack of skill with technology is progress toward mediocrity. As technology advances, craftsmanship recedes... The one thing we've gained is spontaneity, which is useless without perception." - David Vestal