Adding a W/A adapter to a 9mm lens?

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Cineworks
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Adding a W/A adapter to a 9mm lens?

Post by Cineworks »

I'm looking for a cheap W/A setup... On e-bay there are plenty of 514XLs. And I just saw a Canon C8 W/A Adapter (.65X).

The Canon 514XL has a 9-45mm lens.

The question is, would the effective focal length of a 9mm lens coupled to a .65X adapter be 5.85mm? Or is there another way to figure this?

Thanks,
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reedsturtevant
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Re: Adding a W/A adapter to a 9mm lens?

Post by reedsturtevant »

Cineworks wrote:The question is, would the effective focal length of a 9mm lens coupled to a .65X adapter be 5.85mm?
Sounds right. In this manual Canon said that a .65X adapter made 9.5mm into 6.2mm (presumably rounding off 6.175) :
http://www.mondofoto.com/manuals/canonwideconverter/
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