Grumpy_one wrote in post #17474603
This thing just sits. My 24-70 is my goto, can't beat the sharpness. I shot some T&I for the HS the other day and decided to use the 1.8 due low light. I shot at 2.0 and 2.2, it seemed a bit soft. Any real reason to hold on to this lens? Thinking of dumping it. Thanks.
Camera body 5D3, 7D back up.
If you thought it was soft, then you probably just have a bad copy. The 85 F1.8 is sharp wide open, and very sharp stopped down a touch. It's actually too similar to the 85L, realistically, but you wont see someone toss that for the 24-70 unless they just want versatility and only one lens.
If you think the difference of one stop was worth using it, in that last situation, what ISO were you shooting at? I would understand on the 7D. I'd be comfortable with ISO 6400 on there. And I'd shoot ISO 6400 without hesitation on the 5D3. But maybe your comfort level of ISO use and practice has you using much lower ISO when needed? I would look into this for next time. Because unless you found yourself at the ISO 12,800 level and that's with ETTR and RAW in mind for post work, then yes, 1 stop makes a difference. If not, however, and you were much lower (1600~3200), then the 1 stop in my mind is not a big deal and that's where the 24-70 makes more sense for versatility.
The 24-70 MKII is one of the best lenses Canon has made. It's sharp wide open at the level of most primes (most). While it does not have IS and it's not as fast as a prime can be, it does most of what they do (on the right camera) very well, compromising a little bit of that for the versatility of the zoom range.
If you don't use it, dump it.
It comes down to you. I don't think you need the aperture for light, with the 5D3. It's not like you were shooting at 1/1000s action indoors in a gym, where 1 stop matters. I would be looking mainly at the isolation qualities. And while 1 stop does matter there, it may not matter enough for your needs, to give up the flexibility and versatility of the zoom.
If I had the 24-70 MKII and a 6D or 5D3 or 1DX, I would definitely have a hard time picking up the 85 F1.8 if I were doing an event of any kind, where I have the power of high ISO use, and the flexibility of a zoom that is sharp as a prime, spending less down time swapping gear, and increasing my options with two bodies instead or worrying about glass.
But if we were talking about the 85 F1.2 or 85 F1.4, and talking portrait or extreme low light, then there would be a big difference. Because then we're talking 2 and 2+ stops difference, which can really matter in many ways.
I'd dump the 85 F1.8 and if you feel the need for a faster telephoto in the range, maybe look into the 100 F2 or 135 F2. But if you really don't need those ranges, I don't see a real need for the primes here, if you're happy at F2.8, there's no need for any prime if you're ok at F2.8.