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Author Topic: Dust Donut - Add Weather Sealing to Any Lens  (Read 8054 times)

neuroanatomist

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Re: Dust Donut - Add Weather Sealing to Any Lens
« Reply #15 on: January 19, 2013, 12:23:57 PM »
Having had a look at it, I don't think it is intentionally misleading. It does state they're only adding a seal between the lens and mount, and talks in that context.

Much of the time, yes. But many statements make much broader claims - and many people will notice those more so than the accurate claims. Just look at what the OP chose to title this topic: "Dust Donut - Add Weather Sealing to Any Lens" - not, Dust Donut - Add Weather Sealing to Any Lens MOUNT.
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Re: Dust Donut - Add Weather Sealing to Any Lens
« Reply #15 on: January 19, 2013, 12:23:57 PM »

Skulker

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Re: Dust Donut - Add Weather Sealing to Any Lens
« Reply #16 on: January 19, 2013, 12:33:11 PM »
The blurb says : "Now Photographers everywhere can take full advantage of Canon's non Weather Resistant lenses and even the more affordable third party lenses while still benefiting from the increased durability of a Dust and Moisture resistant Camera/Lens combination!"

To me that is very misleading. Fitting this may increase sealing between the body and the lens while the lens is mounted. It wont make a jot of difference to the lens sealing or camera sealing. It is mentioning the weather sealed lenses and there is an implication that this is comparable.

It might sell you never know what some people will buy,  ::) but if it was really this easy to make lenses weather proof they would all be like it.

and as for the rubbish about aerospace tolerances, well its just rubbish but thats marketing for you.
If you debate with a fool onlookers can find it VERY difficult to tell the difference.

RMC33

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Re: Dust Donut - Add Weather Sealing to Any Lens
« Reply #17 on: January 19, 2013, 02:45:00 PM »
and as for the rubbish about aerospace tolerances, well its just rubbish but thats marketing for you.

Goes double since the item is an injection molded piece.

WillThompson

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Re: Dust Donut - Add Weather Sealing to Any Lens
« Reply #18 on: January 20, 2013, 02:01:10 AM »
What it is in my opinion is a SCAM TO SELL a 30 cent "O" ring for $25!

Pure and simple!
Will T.

Mt Spokane Photography

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Re: Dust Donut - Add Weather Sealing to Any Lens
« Reply #19 on: January 20, 2013, 12:04:58 PM »
Having worked in aerospace and managed groups with many inventors, they get carried away with their expectations for their invention, and are paranoid that anyonne who criticises it just doesen't understand.  They often conduct misleading tests that prove mothing.
A product needs to have some independent testing and evaluation for not only functionality, but maintainability and producability.  I'd be very concerned about puttinng that thing on my lens and having the plastic turn to goo in hot and humid weather, just because the inventor got sold on a plastic to use by a salesman from a big company.  We got caught once with a new engineering thermoplastic from a major company that was supposed to replace expensive thermoset plastics.  We ran standard tests on it, but when it came time to assemble the parts made from it, they would not fit.  The cleaning fluids used in our manufacturing process caused the material to stress relieve , which means warp and change shape and size.  It was a expensive mess, just because we did not know they used that particular chemical in their cleaning process.
The material was guaranteed to last 50 years, so I ran some pieces thru my dishwasher at home, and after a dozen times they cracked.  Even experienced and careful people get fooled, a small time inventor has even less of a chance.

ScottyP

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Re: Dust Donut - Add Weather Sealing to Any Lens
« Reply #20 on: January 20, 2013, 12:49:49 PM »
Mmmmm.  Donuts; is there anything they can't do?
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tphillips63

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Re: Dust Donut - Add Weather Sealing to Any Lens
« Reply #21 on: January 20, 2013, 02:09:15 PM »
Is there any reason you cannot buy a Canon lens mount gasket and install it on a lens without it?  If you wanted better protection at the mount at least you would know it would be the proper material as others have pointed out with something like this you won't know until or unless you get one yourself to try.
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Re: Dust Donut - Add Weather Sealing to Any Lens
« Reply #21 on: January 20, 2013, 02:09:15 PM »

RMC33

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Re: Dust Donut - Add Weather Sealing to Any Lens
« Reply #22 on: January 20, 2013, 04:25:18 PM »
Is there any reason you cannot buy a Canon lens mount gasket and install it on a lens without it?  If you wanted better protection at the mount at least you would know it would be the proper material as others have pointed out with something like this you won't know until or unless you get one yourself to try.

Gasket is built into the mount. Look at any of the L series lenses you have listed in your sig.


Mt Spokane Photography

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Re: Dust Donut - Add Weather Sealing to Any Lens
« Reply #23 on: January 20, 2013, 07:44:01 PM »
Is there any reason you cannot buy a Canon lens mount gasket and install it on a lens without it?  If you wanted better protection at the mount at least you would know it would be the proper material as others have pointed out with something like this you won't know until or unless you get one yourself to try.

The mount is designed with space for the gasket, but, as others have mentioned, the mount is only one aspect of a weatherproof lens.
 
It might be even worse than that.  Many of the consumer grade lenses move a lot of air out the rear of the lens when zooming.  Where will it go if the mount is sealed?  That is solved in the design of weather sealed lenses, but might just force dust and dirt innto your sensor and viewfinder big time.

RMC33

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Re: Dust Donut - Add Weather Sealing to Any Lens
« Reply #24 on: January 20, 2013, 08:28:28 PM »
Is there any reason you cannot buy a Canon lens mount gasket and install it on a lens without it?  If you wanted better protection at the mount at least you would know it would be the proper material as others have pointed out with something like this you won't know until or unless you get one yourself to try.

The mount is designed with space for the gasket, but, as others have mentioned, the mount is only one aspect of a weatherproof lens.
 
It might be even worse than that.  Many of the consumer grade lenses move a lot of air out the rear of the lens when zooming.  Where will it go if the mount is sealed?  That is solved in the design of weather sealed lenses, but might just force dust and dirt innto your sensor and viewfinder big time.

I could see that also during a bulb or long shutter exposure forcing dust and crud into the sensor.

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Re: Dust Donut - Add Weather Sealing to Any Lens
« Reply #24 on: January 20, 2013, 08:28:28 PM »