Another 40mm pancake thread!

Started Jun 27, 2012 | Discussions thread
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John M Roberts Senior Member • Posts: 2,274
Re: I retract some of my thoughts

Just after I got up from clicking the post button I realized no, simply placing the filter on top of the barrel of the lens is not correct for obvious reasons. If there is little distance between the glass the actual front of the barrel then most of the filter will be outside the view. If the lens barrel has an extension well beyond the glass like my old FD 55 macro did that would make a difference.

How do you find that distance you are referring to in any particular lens?

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