Wide angle lens adapters

Like if this guide is helpful

If your shiny new "Wide Angle" (sic) Lens Converter appears to be around 0.7x instead of the claimed 0.45x, then consider that 0.7 x 0.7 is in fact 0.49x Hence you need to consider that the converter that is claimed to be 0.45x will only render about 0.7x when using a single linear comparison as another guide writer has noticed. Area and not length!

Hope this helps (and also that I'm correct with this assertion!)     ;<D

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