It's 2:30a and I'm just too tired to make two separate posts has anybody had a good experience with this lens Sigma 135-400mm f/4.5-5.6 I would like to use it for birding also I'm not clear if you can use a multiplier with the 2x I thought I heard someone say that you couldn't. Thank you for looking and you answers
Richard
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Richard

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My son

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My daughter

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And a Friend[/img]