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I must have missed this one. Looks really great. I never tire of this neb and that is why I use it as a test object. You will find the Canon 1.4X produces as good an image as the original lens or very close to it. You have to pixel peep to see the very slight difference. The Canon 2X does not at least for stellar images or very bright contrast as it introduces very slight CA and amplifies the CA of the lens.
This zoom should give you years of flawless service. Any L lens is highly weather resistant and dust sealed. This is very important with a zoom as some can pump in the dust as they zoom.
Again a wonderful deep image as I can see faint nebulosity that an unmodded camera should not normally record unless you have dark skies.
Bert
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