Hello everyone,
I'm new to this site and brand new to DSLR's. I had the opportunity to purchase a Nikon D850. I also have the opportunity to purchase a telephoto lens (budget up to $1800). What I will be shooting most is wildlife & dirt bikes (racing & jumps). I'm not sure when I would have the opportunity to purchase something like this again. When looking at all the different lenses and costs, it just gets really confusing as to which I should purchase. I would really appreciate any advice you could give me. Thanks
to all of you for your time and help!

We like to shoot RAW, but can only post JPEGs (like most things online). So it's necessary to convert RAW to JPEG (i.e., post-process) our images before posting them.

RAW can't be posted since they are too big and each camera maker has their own, proprietary type and we don't all have all the software needed to view them. For example, if you are shooting NEF, I know you're using a Nikon, since that's their proprietary RAW file type. Folks who use Canon or Pentax or Sony or whatever will have software relevant to their own cameras, but not yours.

JPEGs, on the other hand, are smaller in size and pretty much universally viewable. Virtually every computer made the past 20 years has built in means to view them.

The reason a lot of people shoot RAW is for greater control over the finished image and more latitude for adjustment when it's needed. Part of the reason is that a RAW file is 12, 14 or 16 bit color. (Post-processing software interpolates all of them as 16 bit). In comparison, a JPEG is 8 bit. An 8 bit file potentially has around 17 million individual color possibilities, when add up all the color changels. That's more than enough for display because the human eye can discern about 16 million. 17 million sounds like an awful lot, until you consider that 16 bit color has 23 trillion possible colors! Working with a file with far more colors makes for better adjustments... but they then need to be reduced to 8 bit for display (to conserve space online and not bog down everyone's Internet connection unnecessarily!)

I posted these images two days ago and for whatever reason they never made it to the daily digest. I am posting them again in hopes they make the daily digest so others can share in this fun exercise.

Was at the Nature Visions Expo in Manassas, Va last weekend and saw Charles Needle give a talk on creative iPhone photography. He is one of the most creative people I have ever met and it was really great seeing him again after many years. One of the things he mentioned in his talk was a lens kit for mobile phones. I purchased a set and ventured out to Lewis Ginter Gardens today to have some fun with my phone. Below are some of the photos I took with my phone and these specialty lenses. This does not represent all the lenses in the kit, but where applicable I labeled the image with the lens used. (Please note that I am presenting the basic function of these lenses and not necessarily fine art photography. LOL)