85 1.8 on 5DIII vs. 50 1.8II on 40D?

Started Jun 22, 2013 | Questions thread
David Carlyon Regular Member • Posts: 448
Re: 85 1.8 on 5DIII vs. 50 1.8II on 40D?

The 85mm on FF will be slightly "longer" than a 50mm on a crop.

If you do wide apertures, where part of the scene is out of focus, you'll probably find the bokeh of the 85mm to be smoother than the 50mm f/1.8. It's also a much nicer looking and feeling lens. IMO the 50 f/1.8 feels like a toy.

Do you have the 70-200mm f/2.8 IS I or II? If you have the I, might consider getting the 85mm, but if you have the II... I have the 70-200mm IS II, and the 85mm f/1.8, and the only reason I use the 85mm is for non-studio work when I want to use the really wide apertures, usually for low-light shooting (e.g., bands on stage). The 70-200mm II is just so much sharper, and focus is so much faster and more accurate - even for the low-light situations, its AF performance actually makes up for its smaller aperture in many situations, especially when paired with the 5DIII's low light capabilities.

But in my experience, the older 70-200mm I doesn't deliver the same pop, and so you may be better with the 85mm.

eorlingas wrote:

Hi guys,

I used to do some portrait/studio shoot with 50 1.8II on my old 40D. Now that I have the 5DIII, my 50 1.2L is perhaps slightly too wide for my tastes. I do have the 100 2.8L and also 70-200 2.8L IS, but the former is a bit too tight while the latter is a bit too heavy!

I'm thus considering getting an 85, but can't justify spending $2000 for the 1.2L since I don't do portraiture often enough. But I'm want to know if the IQ that I'll get with 85 1.8 on 5DIII will be at least as good as what I used to get on my 40D with 50 1.8II.

I suppose it'll be hard finding someone who's used these exact combos, but perhaps someone can comment on the IQ of 85 1.8 on 5DIII?


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