Exposure compenastion when using a convertor

17 May 2004, 07:46 (Ref:973031)

Groupc

Racer

Join Date: Jan 2002

Bedfordshire

Posts: 150

Groupc should be qualifying in the top 10 on the grid

Exposure compenastion when using a convertor

I know I lose an f stop when I attach a x1.4 convertor. What I don't know is how this achieved. I can see 3 possible methods :-

1 Camera and lens (EOS 10D with 300mm f4 L IS USM and Canon convertor
know what I'm doing and compensate for themselves.

2 I take off a stop using the exposure compensation function.

3 I have to set the exposure manually.

Anyone tell me what I need to do please ?

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