Any hope for an extender?

Started 11 months ago | Discussions thread
OP David Franklin Senior Member • Posts: 1,532
Re: Restated: Any hope for an extender?

Tony D wrote:

When I get I chance I could contact some Zeiss engineers I know (my day job involves working with Zeiss on more specialized lenses, the several million dollar type) but I know they will say similar or would want to know the exact element parameters for the current Canon lenses so they can model this and give a good answer.

If you could ask, then please do ask, as it might help to finally settle the issue for me. But, I do wonder, why would introducing a gap in the extender be such a bad thing? You make it sound like that would be quite bad, and I don't quite understand that. Plus, even if a gap were, per se, a negative, could there be a way that with special optics that such as gap could be greatly minimized?

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