Nikon 50mm f1.4 or f1.8 much difference?

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I love my 50mm f1.8 Nikon prime. Fantastic bokeh, very sharp, bright, and small!
Wondered weather it’s worth changing to a 1.4 or even a 1.2!
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What body are you shooting? DSLR or mirrorless? Do you do landscapes at all?

On a DSLR, I had a Nikon 50 mm 1.4D and used it on a D810. I found I wanted something sharper for landscapes and got a Sigma Art 50 mm 1.4. A very good lens. But it’s bigger/heavier and a fair amount more expensive.

If you shoot Nikon mirrorless, the 50 mm 1.8 S lens Is great. I have one and think it is very sharp and better into the corners and edges than the F mount 50 mm lenses. Probably Nikon’s best 50 mm, although perhaps it will be surpassed by the new 50 mm 1.2 S. I don’t have the 50 mm 1.2 S and have no plans to get it, as it is much larger and more expensive than the 1.8 S. Unfortunately, while F mount lenses can be adapted to Z bodies, Z mount lenses cannot be adapted to DSLRs.
 
Like Charles says.(y)
Personally I’m not thrilled about the F/1.4 , my copy needs to be stopped down to F/5 to get it’s optimal performance.
Wide open it’s just weak

The F/1.2 noct is old, MF and ,if in rare good condition, expensive.

/edit
I’m using the F/1.4 G lens not the older and lesser F/1.4D lens.
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F
 
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f/1.4 to f/1.8 is 3/4 of a stop. Please recall a stop is double the amount of light. If you are shooting in lower light situations, that can be significant. As far as IQ goes, DxOMark.com rates the f/1.4 D and G 50mm Nikon lenses a bit above the f/1.8 versions, but not by a lot. Most lenses perform better a stop or two above wide open aperture, so the f/1.4 lens gives a bit more leeway. I see a used Nikon 50mm f/1.4G on KEH in excellent condition for under $300. Personally, I replaced my Nikon 50mm f/1.4G with a Tamron 45mm f/1.8. It's bigger and bulkier and more expensive, but gets a sharpness rating about 10 points above the Nikon nifty-fiftys. The highest rated glass in the class is Sigma's 50mm f/1.4 Art, which blows everything else away in terms of IQ, but it's a $800 piece of glass compared to the Tamron at $400.
 
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Thanks guys, very informative, Im shooting D3 and D300, but seems like Im gonna stick with 1.8 unless a 1.4 comes along at a good price! I dont know if Im alone in always wanting more/different lenses! Just love trying out a new lens!
 
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