2.0 TC Loss of f stops question

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Fingerpicking 101 Junior Member • Posts: 47
2.0 TC Loss of f stops question

I have the 100-400, great lens . I have tried the 1.4TC and it works great and thinking about the 2.0 TC.

The specs say that I would lose 2 stops of light but I can't find out what the lowest f stop would be.

Any help much appreciated.

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