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Here is the basic equation explaining the relationship:

Focal length / Sensor width = Distance to subject / Width of field at subject

A normal lens for a camera is defined as one whose focal length equals (more or less) the width of the sensor. Often, the width of a sensor is measured from opposite corners. A focal length equal to the sensor width will give you a width of field—at the subject—equal to the distance to the subject. Doubling the focal length halves the width of view, doubling the sensor width doubles the width of view, etc.

I did that last Friday. It was a night parade, no sky light, with inadequate street lighting, on a narrow two lane old-time urban street. 50 mm was definitely too long (on full frame) for many of the shots but I managed to place myself at a turn in the road so it wasn’t awful. I exposed for the highlights, which consisted of a multitude of Christmas lights on each float, and a lot of the shadows were indeed rather dark. The lens was a f/1.8, and most of my shots were f/2.2 at rather elevated ISO. My keeper rate was well below what I’m accustomed to. Definitely I’d use a wider lens were I to do this again, like maybe my 28 mm f/2.8, and I’d shoot it wide open.

CCD vs. CMOS sensors.

Actually, the formulation of the color filter arrays changed, moving from Kodak to mainly Fujifilm dyes. This occurred around the same year as the sensor shift in 2008.

It depends on the neighborhood. Where I live, all utilities are underground. At a former house, I had broadband coming from utility poles.

I’ve had fiber installed at two houses this year, and in both they worked with me to get the fiber, the ONT and the Ethernet exactly where I wanted them at no additional charge. At my old house, the fiber came in through the basement in the back, the fiber runs under the joists until it ends up under my office, and they ran Ethernet up to an outlet on the office wall. At the new house, it enters into my basement workshop, on the top shelf of a cabinet, where the ONT is and Ethernet goes to my router. There is plenty of extra fiber coiled above the drop ceiling for relocation.

At 2000 square feet one unit might work. If you have brick, stone, or concrete interior walls, then it probably won’t work well.

Usually I recommend one WiFi access point per thousand square feet per floor, especially with stick frame and plaster construction, although more area per AP is usable if the surrounding WiFi radio environment isn’t too crowded.

As they said.

But use Ethernet for new network cabling. Coax is good if it is already installed in the walls, but not so good for new work.

Change the shop WiFi device to Access Point mode if possible. Change its SSID (WiFi name), password, and security setting to exactly match your home setting. Then devices will roam seamlessly between home and shop.

Cascading switches is fine.

Doesn’t Spectrum provide a modem for no extra charge? But if you are having difficulties with yours, they’ll swap it out for you.

You might find bargains on newer gear with higher specs at resale shops.

Imagine you want a drink of water. What is best: going outside in the rain and opening your mouth up to catch drops, or turning on a water faucet? WiFi is like rain, Ethernet is like a faucet.