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  1. MJN

    Getting ready to purchase L series lense, looking for recommendations.

    Assuming you intend to hold on to the 7D2, the 100-400 you mention is a truly excellent lens and would serve you well. It will work for BIF with a 1.4x attached but would not be my choice for fast action. You may struggle to get the desired background blur with this lens. Perhaps also consider a...