Strodav
No longer a newbie, moving up!
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- Nov 25, 2018
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days, we used to consider an 85mm to be about the minimum for headshots, and usually preferred a 105 or 135 for portraiture.
I've heard others rave about those. I don't have one but I suppose I could use the 70-200 f 2.8 wide open to almost simulate one. I think the bottom line for the thread starter is just about any lens can be used for portraiture (within reason) and the situation and personal preference dictates which to use. Some are naturally better suited than others. Experiment and find what works for you.
I had a 135mm lens when I was doing portrait work in 35mm film although I did some 1/2 and full body portraits with a 50mm lens, which has about the same perspective as the human vision system. Cameras and glass have undergone a lot of changes since then. Today, I use a FF 46mp D850 and 3 different lenses depending on what the situation calls for. I sometimes use a Tamron 24-70mm f2.8 G2, mostly a Tamron 70-200mm f2.8 G2, and fairly often a Tamron 85mm f1.8. The 85mm prime is extremely sharp, sometimes too sharp for portraits and have to be softened a bit in PP. The zooms are plenty sharp enough and provide for a lot of flexibility, especially when shooting outdoors. Some subjects (models) don't mind you getting too close and you can use a little shorter/wider lens, which makes it easier to separate your subject from the background, but you have to worry about distortion if you go too wide. Longer lenses let you get further away from your subject, which can make them more comfortable, makes it easier to use an on camera flash for fill, but your subject will look closer to the background. I still like shooting portraits at 135mm FF with the 70-200mm, which is 90mm DX (you won't see the difference to an 85mm lens). You want to be careful about going too long, especially with a DX body on hot days as atmospheric effects can affect IQ.
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