Quick questions on fisheye lenses

[rankz]

Two quick and probably silly questions-

1. Which is lense would have more 'bend' 0.3x or 0.43x ?

2. What would be the difference between using these two different size lenses on a 34mm camera? ie, which would produce a bigger 'bend' or leave a black ring?
- A smaller lense with a adapter ring
- A larger lense with an adapter ring

Thanks

[Zone]

A distinct lack of replies leads me to believe people don't understand your question.

Which specific lenses are you referring to and on which particular camera are you wanting to use them on.