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Message: <blockquote data-quote="sonicbuffalo_RIP" data-source="post: 353040" data-attributes="member: 21543"><p>From what I understand, every zoom lens has a 'breathing' rating.  These are hard to find for any specific lens.  By breathing, it means simply that even though the lens is rated at say between 70-200 mm, it really only has a breathing zoom of up to 130 mm.  Thus, the 200 mm lens is really only a 70 - 130 zoom lens.  It doesn't probably help much, but that's pretty much the best for now of how to describe the effect.</p></blockquote><p></p>