Lens problem (Canon 70-200 f4)

[speedneeder]

I noticed yesterday that ther are some 'streaks' on the front element. It looks like when you clean a lens and some streaks are left from the cleaning solution. I tried to clean the lens again (with targus lens cleaner) and it helped, but did not eliminate the streaks. I can't tell any difference from the lens photos, but I was wondering if I'm missing some lens cleaning basic????

[Colin Southern]

Hi Brian,

Try a microfibre cloth and some "L-Breath" - it's all I ever use.

And when you do get it clean, have a think about a UV filter - they're a lot easier to clean

[Geoff F]

Just a silly thought. Are they definitely on the outside and not on the inside where condensation could be the cause.

Otherwise I suppose it may be something which has dried hard and will need a bit of a 'soaking' with lens cleaning fluid to soften it.

[speedneeder]

Hi Geoff, Definitely on the outside. I will try some soaking and see if that helps. Thanks for your suggestion.