Why do umbrella reflectors come in 40" and 43"?

Started Aug 11, 2013 | Questions thread
WFulton
Senior MemberPosts: 2,607
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Re: Why do umbrella reflectors come in 40" and 43"?
In reply to Peter Gordon 01701, Aug 20, 2013

Peter Gordon 01701 wrote:

Seems like a very small difference so I wondered if there is some other technical reason why one size is better than the other? TIA.

They are all sizes, and also, not all are measured the same.

Typically, the fabric dimension is specified, which is the curved over-the-top dimension. The straight across front view will be a bit less, like 45" vs 40".  But the straight across dimension also varies the the degree of curve, more flat, or more curved.

And a few just specify the straight across dimension, or some other number around in there somewhere.

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