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Old Jul 21, 2012, 6:54 AM   #1
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Default Dust in fixed lens zooms

I've put this thread elsewhere but got little response.
So has anyone experienced dust getting onto their sensors in these fixed long zooms .
If so what was done about it cleaning wise??
My FZ7 is ok but I have the zoom inside a filter tube which is screwed to the body. I dont think the long zooms now make filter tubes that are long enough for the full zoom extention.
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Old Jul 21, 2012, 10:28 AM   #2
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So far, I've not experienced this, with my FZ40.
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Old Jul 21, 2012, 5:15 PM   #3
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G'day DS

A very interesting Q - hhmmmm
I would guess that it was quite possible for dust to ingress thru the 'very extendible' zoom mechanism - but the counter to this would be?? if it did occur, surely it would be very small bits of dust and quite isolated

My thinking is that with an interchangeable lens body, the whole lens opening is available for a hurricane-load of stuff to wander in and make itself at home, and yet the dust bunnies when they occur are few & small & far in between [so to speak]

So with a superzoom - would it matter? - and I guess also, it would be easy to pp-splat a dust bunny if/when it started to show up
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Old Jul 21, 2012, 10:41 PM   #4
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I do have a small speck of dust, and it shows only in clean, bright areas - like the blue sky, as a small dull circle. If it shows too much, I mask it by cloning.
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Old Jul 23, 2012, 6:12 AM   #5
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Something I have just thought of, is that a small sensor is less of an area for dust to fall on, which must make some difference.
The fact that this post hasn't been crowded with "I've had that" etc must mean it's not a big problem.
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Old Jul 23, 2012, 12:45 PM   #6
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Quote:
My FZ7 is ok but I have the zoom inside a filter tube which is screwed to the body. I dont think the long zooms now make filter tubes that are long enough for the full zoom extention.
Sure they do. For the FZ18/27/35 it is the LA3, for the FZ100/150 the LA5, and a listed optional accessory for the FZ200 is the LA7. These all should be long enough.

For my FZ35 I had a filter on the lens and used an aftermarket tube that was not made by Panasonic. With the filter on the lens touched the TCON-17 at full zoom so I put a spacer ring on the tube and it worked fine.
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Old Jul 24, 2012, 6:11 AM   #7
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Quote:
Originally Posted by happy_peasant View Post
Sure they do. For the FZ18/27/35 it is the LA3, for the FZ100/150 the LA5, and a listed optional accessory for the FZ200 is the LA7. These all should be long enough.

For my FZ35 I had a filter on the lens and used an aftermarket tube that was not made by Panasonic. With the filter on the lens touched the TCON-17 at full zoom so I put a spacer ring on the tube and it worked fine.
Steve
Thats good news.
My FZ7 has a tube that my protector filter screws into plus the lens hood fits onto it as well but it isnt very long .
I assumed that the FZ200 zoom would be too long and the tube would be just for a converter or macro, I'll have to look into it .
Thanks.
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Old Jul 24, 2012, 5:26 PM   #8
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G'day fellas

For the many years that I had my FZ35, I had the tube installed 100% of the time as it made a good lens hood - and the UV /pola / close-up lenses were 55mm dia and fitted onto the tube rather into the lens barrel - which takes 46mm filters

I also created a lens hood for the 5x to 18x zoom range - via a 55mm metal thread [ie- filter with no glass] glued into the bottom of a plastic drinking glass after its bottom was cut out. Thus the lens hood was 6" long x 3" dia [or thereabouts] and allowed me to shoot to within a couple of degrees from the sun without getting sun flare into the lens. Great device

Regards, Phil
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