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- gary
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Is it worth upgrading from the older version to the newer mk2 is it that much better ?
its not the cost its the wife I do like the push an pull but I always worry about dust getting into the lensYes, If you have the budget then its a massive improvement on the mk1, and as said above its not a push / pull lens, not sure what you prefer though?
Yes, Lee it is but somehow on the new one I never use it like that....!!It's actually quite easy to operate this lens as a push-pull lens.
There's no doubt in my mind that the mkii is a lot better lens than the original one, better AF, IS and close focussing, but I visit another forum which is concerned with wildlife and there have been remarks passed recently on there that the mkii is causing concern over the amount of dust that's getting into it despite the new focus style.Yes, Lee it is but somehow on the new one I never use it like that....!!
Everyone called the old one a "dust pump" but when you think about it, it's no more than the new one is...in fact any lens which has elements moving in and out will show this effect as there is air being sucked in and out on both systems.
Yes George, that's exactly where the problem was reported there, behind the front element. I don't know how common this is but it's a bit worrying for a lens of this value and given its supposed to be a professional weather sealed item!Didn't realise that it was a general problem on the new lens, mine's going back together with all my other gear to Elstree as I've got a window between trips for a clean and check, the internal dust is inside the front element.
so dust is a problem too with this lens ? ive had the original 100-400 for over 10 years and I cant see any dust although ive never gone searching for itI had to send mine back to Canon after 2 months to have a large amount of dust removed. It actually showed up in the images. Still a superb lens though.
To the people with dust in the front element are you guys using filters, don't some canon lenses need filters fitted to be fully weather sealed (not sure if this is the case with the 100-400 mk2)
surely the dust gets into the lens via the in and out movement of the barrel when zooming and not through the glass I cant see how a filter would stop dustI read in one review of the 100-400 II that a filter was needed to complete the weather sealing. Not sure whether or not that is widely accepted as fact though.
"Designed for outdoor use, the 100-400 L II features a weather sealed design. This lens is not waterproof, but it is made to be used in wet and dusty conditions. Specifically, the manual states "Tight seal structure provides excellent dustproof and drip-proof performance" but then disclaims that sentence somewhat by stating "However, it is unable to provide complete protection from dust and moisture." Chuck Westfall of Canon USA has confirmed that a filter is required for full sealing of this lens."
http://www.the-digital-picture.com/Reviews/Canon-EF-100-400mm-f-4.5-5.6-L-IS-II-USM-Lens.aspx
Yeah, I'm not sure either, but then I didn't write this, I only quoted it....surely the dust gets into the lens via the in and out movement of the barrel when zooming and not through the glass I cant see how a filter would stop dust
surely the dust gets into the lens via the in and out movement of the barrel when zooming and not through the glass I cant see how a filter would stop dust