Do we still "need" fast lenses ?

Started 6 months ago | Discussions thread
vyoufinder Senior Member • Posts: 1,242
Re: Do we still "need" fast lenses ?

YRUNVS wrote:

vyoufinder wrote:

You pretty much nailed it. The only real reason for fast lenses nowadays is bokeh isolation. A secondary reason could be for opening up brighter on dSLR's to help see. For any other purpose, you generally get better image quality with a slower lens which has fewer/thinner glass elements inside.

So in F mount the 24-85, or 24-120 have better image quality than the 24-70E?

70-200F4 vs 70-200E?

200-500 5.6 vs 180-400 4?

While it can be argued that some performance is left on the table of the less expensive lenses by the designers, I think in the market today faster lenses tend to offer better image quality.

I should've added that I was talking about prime lenses of similar quality.  Zooms can be so many different designs that I would not say my statement holds true for them.

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