after a whole day shooting yesterday, so i decided to clean my lenses a bit
but then i realize there are a lot dusts in my 24-105mm. i mean INSIDE!
you can even see some dusts in the elements inside (second and third rear elements)
i swear it was clean last week, it must have been the last shoot, it was a little wet
but i only changed lens a couple times
this lens is meant to be weather sealed right?
how did all the dusts get in there...??
anyway i need some advice please
do i have to send it to canon to have it clean? the lens is still under warranty,
does it cover this?
anyone in the uk has any similar experience??
how much does it cost if i have to pay?
this might sound a little stupid... where exactly is the canon centre in the uk?
i did do a search, but i didn't find anything useful
any advice would be much appreciated
thanks
Canon’s definition of “Weather Sealed” does not mean Hermetically Sealed. It’s kind of like the difference between the terms “water proof” and “water resistant” for wrist watches. Weather Sealed L lenses are much more resistant to the elements than standard lenses, but there’s no way to make them completely airtight. Particularly for zooms, that extending barrel displaces air, and that air has to go somewhere. They might build in extra gaskets and seals to help keep out dust, but there is always a chance for something to get in.
As for dust, the farther away from the sensor plane, the less it’s effect. Other than being psychologically annoying to the owner, dust inside a lens usually has almost no effect on the final image. Unless you can really see some degradation to your images, you’re probably just as well to leave it alone.
I've never seen anyone show that small amounts of dust inside their lens was causing any problems. The lens would literally have to be coated, and even then, you probably mostly see a reduction in contrast and little else. Don't worry about it. Every lens I've ever used had some dust if you shined a flashlight down it.
It's a waste of time to have that lens cleaned. It will suck in more dust in a few weeks and look exactly the same. Like others have said, makes no diff in IQ.
The 24-105 L has a nested barrel with a "skirt" to reduce dust intake while zooming. Realize air does vent through the nested barrel and out the rear during zoom and focus. Elements move so air must be displaced. If the lens was completely sealed you'd be fighting against air pressure.
If you're really anal you could avoid zooming and changing lenses in dusty conditions.
Just did some test shots, it doesn't show any signs in the image, well except at very small aperture down to f22 which i never use....
i guess everyone is right, may be getting it cleaned is just a waste of money and time...
although i must admit, it really annoys me
thanks for response, guys
himcheong wrote:
Just did some test shots, it doesn't show any signs in the image, well except at very small aperture down to f22 which i never use....
i guess everyone is right, may be getting it cleaned is just a waste of money and time...
although i must admit, it really annoys me
thanks for response, guys
down at f22 any loss is more likely defraction or if you can see evidence of dust its probably on the sensor.
my 24-105 is my "dustiest" lens. I have never ever spotted a speck in a photograph. Worrying about this type of wear and tear will drive you mad. Gaffer tape dangling, viewfinder dusty, lens hoods scuffed. That's shooting.
himcheong wrote:
wow, this is unbelievable
i wonder what lens was that... you can't really tell from the picture
It was an old Sigma 80-400 that got dropped on its snoot right on a rock. I actually took the pictures expecting to see a kaleidoscope - thought maybe I could start a closet industry for special effects lenses
All my lenses have dust in them. When holding a lens up to the light looking through the barrel. Does not affect images...not sure why people make it such a big deal?
