People buy Nikon (and Canon) DSLRs because
they have the best lens selection.
So - good glas for the Nikon D750 ? You need to be a BIT more specific. Otherwise one can list HUNDREDS of good pieces of glas.
Thats:
- About a hundred lenses from Nikon themselves that are currently in production
- Douzens of lenses you can get from other companies for the Nikon F mount (for example Zeiss, Sigma, Tamron, Tokina, Schneider Optics, Hartblei, Lomography)
- and tons of older lenses you can get for Nikon F on the used market (Nikon AF, Nikon AI lenses, though some of those are still in production).
Since I list them below and beginners often scoff at prime lenses ("outdated" etc is what you get to hear): Primes are compact, bright, and optically superior. They also give you more shooting discipline - meaning primes often give you better photographs simply because they force you to think. Choosing a prime lens means choosing a viewing angle. Just because you use prime lenses doesnt mean you should carry around more lenses. It only means you "zoom by feet", and that you are restricted by the viewing angles through your choice of lens. What primes you choose though depends highly upon your personal taste. There have been whole photographer careers around carrying around just a single 50mm, or a single 35mm.
Example for good initial glas:
- Sigma 35mm f1.4 "Art", Tamron 90mm f2.8 VC macro - Two primes lenses with excellent (for the Sigma) and pretty good (for the Tamron) image quality. Of course many newbies will complain that they are not zooms. Pros however "zoom by feet" when using a prime.
- Nikon AF-S 28mm f1.8, Nikon AF-S 105mm f2.8 VR micro - The same in form of Nikon glas (but both pieces of glas are a bit worse than the Sigma/Tamron equivalents).
- Your choice of Zeiss primes (those are manual focus, very pricey, highest image quality):
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Distagon T 2 8 15 ZEISS International
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Distagon T 3 5 18 ZEISS International
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Distagon T 2 8 21 ZEISS International
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Distagon T 2 25 ZEISS International
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Distagon T 2 28 ZEISS International
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Distagon T 1 4 35 ZEISS International
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Distagon T 2 35 ZEISS International
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Planar T 1 4 50 ZEISS International
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Makro-Planar T 2 50 ZEISS International
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Planar T 1 4 85 ZEISS International
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Makro-Planar T 2 100 ZEISS International
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Apo Sonnar T 2 135 ZEISS International
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Otus 1.4 55 - The best short tele lens in the world ZEISS International
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Otus 1.4 85 ZEISS International
I left out the 2.8/25mm because its a known stinker, possibly the worst glas from Zeiss, while the 2.0/25mm is known to be brilliant, possibly the best wide angle you can get for the Nikon F mount right now.
- Nikon AI - same as above, pure manual lenses, but from Nikon themselves. I have tried to find out which of this old glas is great, but thats surprisingly hard to figure out.
- Nikon AF-S 24-70mm f2.8, AF-S 70-200mm f2.8 VR2 - Two of the "Nikon Trinity" lenses (the 14-24mm f2.8 would be needed for completeness) which offer compromise free quality (but they are also very heavy and expensive)
- Tamron 24-70mm f2.8 VC, Tamron 70-200mm f2.8 VC - Pretty much the same with a bit less build quality, but the 24-70mm offers VC too (which means image stabilization), and they are cheaper.
- Nikon AF-S 16-35mm f4 VR, AF-S 70-200mm f4 VR - This is the two lenses that I use, plus an 28mm f1.8 that offers a tad more IQ and more light.
- Nikon 24-120mm f4 VR - The convenience zoom. Especially if you dont like changing lenses and still want some focal length variance. The 24-85mm f3.5-4.5 is pretty much the same, but cheaper.
And yes, these are just examples of what people could get. Really depends upon your personal taste.
For example if you're 100% into landscape and macro work, maybe you'd want the tilt/shift lenses (Nikon PC-E 24mm, 45mm, 85mm) instead. Though in that case maybe you'd prefer Canon, they have one more focal length (17mm), can move both tilt and shift independently, and are optically superior.