2x300mm=500mm? lens mystery
Of course, it may be that the convertor is a bit optimistic too.
G
G
I did read some years ago that most 24mm lenses were in fact closer to 25mm, but not many manufacturers label their lenses 25mm....
I think we could safely assume that many 28-80mm lenses could be 29-78mm ones, or something similar!
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2277 posts
54 years
I have a Tamron SP 500mm f8 mirror lens.
I also have a Pentax F* 300mm f4.5 EDIF lens.
I also have a teleplus Pz-AF 2x convertor.
The thing is, when I use the 2x convertor on the 300mm lens, the resulting focal length seems to be exactly the same as the 500mm! So one of them doesn't do quite what it says on the tin. What's going on?
Steve
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