Dust from push pull lenses

Devonlad

Devonlad

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Tony
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I am looking to buy a Canon EF 100-400 IS lens as i have been birding recently and really getting into it but my 70-200 was just far to short.
My concern is with the lens being a push pull will the chances of dust getting on my cameras sensor increase dramatically?
I have never attempted to clean a sensor and will not start now and do everything i can to avoid dust at all costs so spending £850 on a lens that will act like a Dyson goes against the grain,, or am i being over dramatic
 
I would've thought the dust risk was more inside the lens than into the camera body.
However you need to get over the cleaning phobia, I bet it's already filthy if you check it.
 
I,ve got the 100-400 and dont get any more dust than from my other lenses:)
 
Having owned a 100-400 for around 5 years and have used it extensively, I haven't had any dust problems. It has a reputation as a dust pump, drawing dust into the lens, but I doubt even then that it could contaminate the cameral body, however, amongst my friends who also own them, I haven't heard of anyone experiencing this supposed dust problem. I can only speak for my personal experience and that has been good, its a lens I wouldn't part with and ideal for birding.
 
Devonlad said:
I am looking to buy a Canon EF 100-400 IS lens as i have been birding recently and really getting into it but my 70-200 was just far to short.
My concern is with the lens being a push pull will the chances of dust getting on my cameras sensor increase dramatically?
I have never attempted to clean a sensor and will not start now and do everything i can to avoid dust at all costs so spending £850 on a lens that will act like a Dyson goes against the grain,, or am i being over dramatic
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Yes ;)

If you have the Canon 70-200/2.8 Mk2, a 2x extender on that makes a very good alternative to the 100-400.
 
4wd said:
I would've thought the dust risk was more inside the lens than into the camera body.
However you need to get over the cleaning phobia, I bet it's already filthy if you check it.
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Totally this, I've used a couple of 100-400's and the dust issues were no worse than usual. Cleaning your sensor is part and parcel of owning a dslr do an f22 test and I bet it's disgusting. Cleaning is no big deal once you've got over that initial fear you'll wonder why you've never done it before!
 
Trev4 said:
Having owned a 100-400 for around 5 years and have used it extensively, I haven't had any dust problems. It has a reputation as a dust pump, drawing dust into the lens, but I doubt even then that it could contaminate the cameral body, however, amongst my friends who also own them, I haven't heard of anyone experiencing this supposed dust problem. I can only speak for my personal experience and that has been good, its a lens I wouldn't part with and ideal for birding.
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Thats music to my ears, Thank you
 
Thanks folks that has put my mind at rest, My camera is only 12 weeks old and lucky enough a f22 shot of the sky shows nothing but sky.
I would have no idea where to start with sensor cleaning and as i have eye problems (registered as blind) i am unsure i could even do it
 
The push - pull looks from the outside like its doing loads of movement, but every zoom lens has to move air about to work, in that respect it's a 'bit worse' but shouldn't be too much different.

As far as cleaning goes, it'll need doing sooner or later, if you can't DIY due to your condition, you'll either need to find someone local willing to help, or pay someone else. If you lived close to me I'd do it for you happily.
 
Push/pull is utterly irrelevant to dust ingestion. If the volume of a lens changes over it's zoom range, then there is a risk of dust ingestion, and this must be catered for in the leas design.

My 3 year old 100-400 is dust free.
 
I've owned a couple of 100-400s including my current one (which I love) and I've never found dust to be any different to any other zoom.

Any zoom lens goes in and out - whether it rotates or not whilst doing so makes no diffrence.

I love it on a bean bag, hand on top of the lens, whilst sliding quietly forwards or backwards depending on whether it's a small zoom or medium back off sized bird.
 
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I can onlt reitterate what the others have said. I've had one for many years now and never had a dust issue with it. Just get one. The end!!!!
 
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