I'd go with the classic Nikkor 24-70 f/2.8G AF-S, which is part of Nikon's "Holy Trinity," because (a) it will no doubt have a higher resale value when you decide to sell, and (b) it will come in handy if you ever decide to abandon the world of mirrorless cameras and move to full-frame FX Nikon cameras.

I don't know what caused the spots (dirty lens, mold or fungus on one of the elements, sensor dirt, etc.) but I was able to easily remove them simply using the edit / retouch tool in Apple's Photos on my Macbook Pro. My edit is attached. Not a super "professional" fix, but effective.

Neither... Buy a monopod instead and save money.

Save some money!

When I bought my Nikkor 14-24 f/2.8G a few years ago, the first thing I looked for was a way to protect the bulbous front element from scratches, dirt and cracks. I found Fotodiox's WonderPana, which provides extra protection to the lens as well as the ability to add filters.

While it looks a little peculiar when attached to the lens, it definitely provides protection you want to the front of your 14-24 lens... plus the option of using other special effects 145mm filters over the lens in addition to the skylight version.

Check out Fotodiox's listing for the WonderPana solution for ultra wide angle lenses, and you may decide not buy a whole new wide angle lens: https://fotodioxpro.com/collections/wonderpana/products/wpcore-nk1424

I too have a D850, and the 28-300 is a great and versatile lens which I've been using for about four years. You will be happy with result... sharp shots, great resolution and image quality. And you're in luck... Nikonusa.com currently has a 10% discount on refurbished lenses, and the 28-300 is included. Sale lasts until end of the day Monday, February 24, 2020. Check out nikon's website and see the customer reviews for this excellent value for the money lens (https://www.nikonusa.com/en/nikon-products/product/refurbished-camera-lenses/2191b/af-s-nikkor-28-300mm-f%252f3.5-5.6g-ed-vr-refurbished.html). You won't be disappointed.

A... I saw this question on Trivia Hive a few months ago...

I bought a refurbished D850 from nikonusa.com last year and according to shuttercounter.com, it arrived with 30 actuations. See attached EXIF data information report prepared from ShutterCounter on 1/6/2019.

Attached file:
(Download)

In the near-socialist State of New York and the socialist City of New York, we pretty much pay high taxes on everything... online, offline and no line...

A butterfly flew into my Midtown New York City apartment... shot with an iPhone XR

Don't subscribe.

Switch to Nikon and don't look back...

In late 2015 I was in the same predicament as you: I had a D7100 camera and about 5 Nikkor DX lenses. But I fell in love with the Nikon Df FX camera and its 50mm F/1.8G kit lens and traded-in my old D7100 and DX lenses to buy a Nikkor 70-200 f/4G ED VR AF-S FX lens in order to take maximum advantage of the Df’s larger FX format. To make a long story short, I was so pleased with the results I was getting from my Nikon Df and FX lenses that by late 2019 I had accumulated 41 more FX lenses plus a second Df camera body along with a Nikon D810, which I recently replaced with a D850. If you decide to get the D810 and take advantage of this camera’s capabilities, be prepared to deal with the temptation to spend $$$ upgrading to FX lenses. (Personally, I’d recommend that you consider purchasing a Nikon factory-refurbished D850 instead, but that’s a whole other story...).

I inherited about 10,000 35mm slides from my father, and used a Nikon ES-1 Slide Copier mounted to a Nikkor 60mm f/2.8D Micro lens and my D810 to digitize the most "save-worthy" photos... about 1,000. The most difficult part of the project for me was sorting through the slides and finding the keepers. Once I started rolling with the dupes, it took me about 2 or 3 minutes per photo to get the shot I wanted. The quality of the duplicated digital photos for the mostpart was quite good, and overall, this three-month sorting & duplicating project was a lot of fun. See attached photo of me sleeping on my father's stomach in April 1951, shot by my mother. Nikon's web site provides advice how best to use their ES-1 Slide Copier.

I don't know if a Nikon Series E lens can be mounted onto a Panasonic camera, but if you're talking about the Nikon f/1.8 SERIES E 50mm AI-S Pancake manual lens manufactured between 1981 to 1985, it's an amazing lens.

https://www.youtube.com/watch?v=rIieKIPiyPk&t=441s