Dust inside my XF 90mm... replacement !

[Benoa]

Hello hello,

 

I returned the first Fuji XF 90mm lens I ordered because it had dust inside right out of the box. The replacement was clean but after 3 months: specks of dust all over – I counted around 20. I am aware this does not affect image quality but for a weather resistant (WR) lens, I find it hard to accept. Never had such problems with my Canon L lenses (that I have used extensively in all conditions for 10 years) or my other WR XF lenses (35mm and 16mm). I’ll pay the Fuji Service center a visit tomorrow and ask for a replacement, let’s see what they say… My guess is that dust settles in during the manufacturing process and starts spreading after use

 

Photo there: http://www.benoa.net/2017/06/xf-90mm-and-dust.html

 

[dfaye]

On the question of how dust gets into a weather-sealed lens, this article is well-worth reading - and it makes you glad it's only dust inside the lens! https://petapixel.com/2015/06/10/we-found-a-fly-inside-a-weather-sealed-lens/

[Jürgen Heger]

Thanks to dfaye for the link.

My personal summary from the link is that the camera is part of the weather sealing. Whan you remove the camera from the lens you break the sealing and dust and worse may come into the lens.

Before reading this I was not aware of it.

[Benoa]

Fuji is going to fix it for free.

 

I'm always very careful when swapping lens.

 

I've been shooting with Canon L lenses for years, never had this kind of problem, especially only after a few weeks of use.

 

My guess - as the post reads - is that it's dried glue which starts peeling off after use.

[neal3K]

On the question of how dust gets into a weather-sealed lens, this article is well-worth reading - and it makes you glad it's only dust inside the lens! https://petapixel.com/2015/06/10/we-found-a-fly-inside-a-weather-sealed-lens/

The article is fascinating.  And the last paragraph is the most interesting of all!