I use only OEM cartridges. Canon support has been excellent and free. I did have to replace the print head, and a year later I again had a problem. I was able to resolve it by the cleaning process in the driver software.

I have had good results with Ebay. Do not send your equipment before you are sure that you have been paid.

The human eye/brain does not see in the same way as a camera records an image. It is true hat the eye has a very large field of vision, but peripheral vision does not see detail and color. The peripheral receptors in the retina are rods that do not see detail or color. The central retinal receptors are cones in the macula and particularly in the fovea centralis. They send detailed color information to the brain. There is some truth to the concept that a 50-55 mm lens on a full frame camera produces an image that is equivalent to human vision, but that concept is not totally accurate.

I have digitized many slides using my Sony A7R4 with a Nikon adapter, Nikon bellows, Nikon 55mm Micro Nikkor, and Nikon slide copier. With this setup I can control color balance, cropping, and other issues and save it to RAW and JPEG files. This allows for any editing that I wish to do and does not compromise quality control. It is a little more effort.

Whatever manufacturer you select, you will get more reach with the same focal length lens with an APS-C camera than with full frame. That will keep the weight down. If you can find a camera store, you would be wise to try several cameras to see how they feel in your hands.

Generally, modern digital cameras have a native ISO of 100. This is the best quality setting for the best dynamic range and the least noise. Higher ISO settings are valuable for low light and action photos. Lower ISO settings (eg ISO 64) are valuable to reduce depth of field in order to isolate a subject. Choosing ISO settings is always part of the tradeoff, the choices that we make in our photographic art.

I have a Sony A7R4, and I especially enjoy landscape photography. A favorite lens is the Sony/Zeiss 16-35 mm F/4. If you don't mind the increased cost and weight, the G Master is a better lens, but I highly recommend the Sony/Zeiss. Circular polarizing filters are another must.

I use my Nikon bellows and slide copier with a Midro-Nikkor lens with my Sony A7R4. I have also used it with a Nikon copy stand. I feel very fortunate to be able to use this vintage equipment with my modern camera.

Some of the free stuff is ok, but most of it is crap.

If you have an old filter that you have no use for, you can take it to an optical lab along with your new filter material. They can remove the old glass from the ring mount, make a pattern, and cut a new lens from the material. They should be able to mount the new material in the mount. Any lab that makes glasses should be able to do this.

There is a new update to Luminar Neo that is a major improvement. After I ran the update, the program would not start in Windows 10. After several attempts, I was able to fix the situation by uninstalling Luminar Neo, disabling my VPN, logging into my Skylum account, downloading Luminar New and installing. That worked like a charm. Probably we should give Skylum some slack, as they are mostly in Ukraine, and they are in a terrible war.

Probably Dave Busch has a book out. He is an excellent guide to Sony cameras.

I had a Toshoba 16-pin dot matrix impact printer in my office. It had a tractor attachment that pulled fan-fold paper. I bought it in December, 1985 for about $1500 as part of a system that coumputerized my office. The printer was built like a tank and printed on paper as wide as 11 inches, and it printed on multi-part forms.

I had a Toshiba 16pin fan-fold dot matrix printer that I bought at the end of 1985. It was built like a tank and would handle paper as wide as 11 inches. It would print multi-part forms. I think that the price was about $1500.

Your camera should be insured, either be a separate policy or with a rider on your homeowner's insurance. Make sure that you have photos of your equipment and documenting of serial numbers. Another documentation is the My Gear Vault on your smartphone. You probably will want to bring a wide zoom lens and a normal to short telephoto lens.
Enjoy.