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Old 29-05-2018, 10:07 PM
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Atmos (Colin)
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Atmos is offline
Join Date: Aug 2011
Location: Melbourne
Posts: 6,421
Originally Posted by LewisM View Post
Metal back is from the rear most metal of the corrector (not counting threads) to the image sensor
So when the back focus of 180mm is mentioned, it is referring to the maximum back focus?
Where as the Metal Back of 115.5mm is just the imaging back focus?
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