Best lens for wedding pictures

[rs-eos]

There is no single best lens for weddings. For such events, you need have versatility.  Some things that the pros typically use:

• 70-200mm f/2.8
• 24-70mm f/2.8 (or wider angle for large group photos)
• 100mm f/2.8 Macro (for detail shots; e.g. rings)
• Potentially primes with very wide apertures (f/1.2 to f/1.8)

[ebiggs1]

"There is no single best lens for weddings. "

I have to disagree with that. After doing wedding for nearly half a century I can very confidently say the ef/rf 24-70mm f2.8L is the best wedding lens. Are there other lenses that are "nice" to have, certainly but the OP asked for the best lens. I had four of them , still have two, and I can easily say one was one my camera(s) 90% of the time.

Primes, any prime even like a 100mm macro is way down on the list to almost not helpful at all. I don't ever remember using the 100mm macro (although I do own one) but I did use my 400mm prime, only very rarely. There was a time when primes ruled but that was back in the olden days.

This is a difficult question to answer because situations and conditions change but still the answer to what is the best wedding lens, it is the 24-70mm f2.8L without hesitation.