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Author Topic: What is Sigma up to?  (Read 113968 times)

armand

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Re: What is Sigma up to?
« Reply #100 on: February 28, 2018, 05:28:42 pm »

I'm curious, what use would you have from that Sigma that's not met by the much smaller available lenses?

BernardLanguillier

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Re: What is Sigma up to?
« Reply #101 on: February 28, 2018, 06:19:47 pm »

Besides, I would be surprised if they were able to make money with it below a 1,700~1,800 US$ price point.

The best maybe to look at it as a light and very affordable 200mm f2.0.

Cheers,
Bernard

shadowblade

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Re: What is Sigma up to?
« Reply #102 on: February 28, 2018, 08:43:36 pm »

Besides, I would be surprised if they were able to make money with it below a 1,700~1,800 US$ price point.

The best maybe to look at it as a light and very affordable 200mm f2.0.

Cheers,
Bernard

The 135/1.8 already does that, and potentially a better job of it.

It has the same 75mm physical aperture size as the 105/1.4, so will give the same degree of background blur when the field of view at the focal plane is the same (although, as a longer lens, you'd be standing 30% further away to achieve the same field of view). Additionally, at f/1.8, it allows you to keep more of the subject's face in sharp focus than the 105/1.4, while still blowing out the background to the same degree.

Of course, this says nothing about the quality of the bokeh. It may well be that the 105/1.4 has smoother bokeh than the 135/1.8, despite the quantity of background blurring being the same. In that case, I hope it can take a 1.4x TC and has enough central sharpness to carry it well - a 147mm f/2 option, with super-smooth bokeh, could be even better than either 105/1.4 or 135/1.8.

I'd like to see Sigma bring out a 200/2 lens. It would be the next logical step in their lineup of portrait lenses, and given recent history, would likely give the Canon and Nikon versions a run for their money.
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kers

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Re: What is Sigma up to?
« Reply #103 on: March 01, 2018, 04:51:36 am »

This Sigma 105 f/1.4 is a heavy big monster of a lens...
combine that lens with a Sony 7 ;)

https://www.dpreview.com/articles/7988525955/cp-2018-hands-on-with-sigma-105mm-f1-4-art-bokeh-master
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Rado

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Re: What is Sigma up to?
« Reply #104 on: March 01, 2018, 07:01:24 am »

The front element is a beautiful piece of glass isn't it. The 105mm filter thread is a bit insane though. They could have at least tried to keep it under 100mm so that one could use 100mm filter holders on it.
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BJL

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Re: What is Sigma up to?
« Reply #105 on: March 02, 2018, 07:03:54 pm »

This Sigma 105 f/1.4 is a heavy big monster of a lens...
combine that lens with a Sony 7 ;)

https://www.dpreview.com/articles/7988525955/cp-2018-hands-on-with-sigma-105mm-f1-4-art-bokeh-master
And that is why there is a tripod mount for the lens which doubles as a hint about where to put one hand when hand-holding, making the sometimes feared lens-body weight disparity irrelevant for those of us who hold cameras that way.
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