If I want to improve a Nikon D500 image (20.5 mb), can it be made comparable to that of a D850 (45.4 mb)?

If so, how? Is that equally so for JPEG and RAW formats?

What are the trade offs?

Many thanks! I feel the way I did in analyzing family finances to pay for three undergraduate degrees at state schools in NC. The goals were for all of us to be debt free when they graduated. The kids were 1, 4, and 8. I could define various goals, factors, and assumptions. But I was never confident in my ability to set up the equations accurately. FYI the Andrew Tobias Managing Your Money program had a fill-in-the-blank section that handled it well. The upshot was that I needed to make more money and I figured the potential of my day job exceeded that of any side enterprises.

Need some feedback for purchasing my next lens.

I currently have a Canon 90 D. The only lens that will work with it is a Sigma 150 -600. It's great for my wildlife photography which is my focus, but I still need something else to continue to do other types of photography.

The budget is limited since the camera and lens are relatively new purchases. I want to do some landscape, flowers, and general all-around stuff. With my flowers, I typical lean more to close-ups, and I currently use my iPhone for that.

I am currently looking at trying one from Amazon (free return policy). The Canon EF-S 18-135mm f/3.5-5.6 is a Standard Zoom Lens for Canon Digital SLR Cameras (New, White Box). I know it's not a USM, but I wonder if it might be a stop-gap lens. I'm open to looking at other ones, but recently, this one has popped up.

I typically purchase from B& H. Also, open to refurbishment.

Any insight would be greatly appreciated!


Thanks!

Barb