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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 05 Jan 2014 (Sunday) 18:00
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NCHANT
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Jan 05, 2014 18:00 |  #1

Hey,

So we spent a week up north hanging out on gorgeous beaches etc, and what happens? One of my lenses gets sand in it.

I'm pretty good at caring for my lenses and gear, so was quite surprised to find 1 or 2 grains of sand under the focus ring (not inside the glass etc). Manually focusing does make a grinding noise, but auto focussing doesn't.

It's not a big deal to me, the lens still works perfectly, but how can I get these grains out from under the ring?

Cheers.


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DieselTech
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Jan 05, 2014 18:27 |  #2

Try using a rocket blower or a compressed gas air duster.


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Jerobean
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Jan 05, 2014 21:27 |  #3

DieselTech wrote in post #16580505 (external link)
Try using a rocket blower or a compressed gas air duster.

I personally wouldn't use compressed air on any of my photography gear.


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joeseph
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Jan 06, 2014 02:04 |  #4

you could try holding a vacuum cleaner nozzle around the focus ring while rotating back & forth & see if the sand can be de-installed that way...


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ejenner
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Jan 07, 2014 13:48 as a reply to  @ joeseph's post |  #5

I've had this with my 17-40 and with the zoom on the 24-105. Eventually it either got ground down with use of the manual focus or worked its way out.

Of course both those lenses are built pretty darn well, not sure about what lens you are talking about.


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Jan 07, 2014 13:58 |  #6

DieselTech wrote in post #16580505 (external link)
Try using a rocket blower or a compressed gas air duster.

Rocket Blower, yes; NEVER used those compressed gas dusters on your electronic gear. If you tip them too much and they blow liquid gas all over your stuff it can do nasty things.


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DieselTech
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Jan 07, 2014 17:35 as a reply to  @ Snydremark's post |  #7

Yea, to be safe, dont use air duster. I just thought it is a pretty effective solution and much stronger than the rocket blower too :)


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DreDaze
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Jan 07, 2014 19:09 |  #8

anytime i've had sand around a lens, it's usually just worked it's way out at some point after using it some more


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amfoto1
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Jan 07, 2014 22:23 |  #9

Definitely don't use compressed air or a bulb blower. Those will just push the sand farther into the mechanism. That's exactly the opposite of what you want to do.

Use a vacuum cleaner to pull the sand out. You might need to turn the focus ring a little, back and forth, while applying the vacuum. I'd be a bit careful not to apply too strong/direct vacuum. I've used a vacuum successfully to get grit out of lens rings and dials on cameras.

Do not leave the grit in there and continue to use the lens. The sand will grind away at and damage the mechanism.


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DreDaze
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Jan 08, 2014 00:57 |  #10

amfoto1 wrote in post #16587121 (external link)
Do not leave the grit in there and continue to use the lens. The sand will grind away at and damage the mechanism.

or it will just fall out...i'm sorry, but until i see an account of a lens damaged from sand grinding away the mechanism i just won't believe it...


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DieselTech
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Jan 08, 2014 01:00 as a reply to  @ DreDaze's post |  #11

my my... look at the all the fights... :D


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Jan 08, 2014 06:57 |  #12

general question: Do you use manual focus? If not f**k off lol.

I mean AF is working perfectly so why mentioning. I realised (i'm a hobbyist photog) that even if i spent way too much on my gear, i shouldnt matter about things like that and use it to make pictures, not treating it like a newborn baby.

Once i was really pissed off because i scratched the coating on my front element of my 50L. I cleaned it and rubbed it so that its not visible anymore. Obviously i've removed coating. Since then, my 50L gives me much more pleasing images when pointing to the sun it gets great and very aesthetic flares. Glad i "damaged" it, know what i mean? ;)


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ACESFULL82
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Jan 08, 2014 09:52 |  #13

Snydremark wrote in post #16585828 (external link)
Rocket Blower, yes; NEVER used those compressed gas dusters on your electronic gear. If you tip them too much and they blow liquid gas all over your stuff it can do nasty things.

Yeah we use those around here at work, we tip them over and spray on people. Leaves nasty little burn marks. Lol. Yeah i would agree dont use those on your camera gear.


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NCHANT
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Jan 08, 2014 16:46 |  #14

davidfarina wrote in post #16587727 (external link)
general question: Do you use manual focus? If not f**k off lol.

Huh?

Why would it matter if I use either?

I'll try vacuuming and see how it goes :)


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xarqi
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Jan 08, 2014 23:15 |  #15

NCHANT wrote in post #16589035 (external link)
I'll try vacuuming and see how it goes :)

Call me paranoid, but I'd put a fine cloth between the nozzle and the lens as you do it. You may be able to capture the sand and thus verify its removal, but you may also capture any tiny bits of mechanism you happen to hoover out in your zeal!




  
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