I have a 30+ year old Slik U212 and it is an outstanding tripod but it does admittedly strain somewhat under the weight of my 12+ pound 600mm f/4 AIS Nikkor. I have a very sturdy Bogen studio tripod which handles it like a champ but it is somewhat cumbersome to take to the field, it is a good 7 pounds all by itself
That is definitely a heavy set-up. if it does great and you don't mind the weight then it is all good.
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