The D100 is the older camera (It is from 2001); Nikon's numbering scheme is slightly confusing:
Single digit (F1, F2 D2, D3) are professional cameras
Three digit (F100, D100, D200, D300) are semi-professional cameras
Two digit (D40, D60, D90) are keen amateur cameras
Four Digit (D3000, D5000, D7000) are keen amateur cameras too
The Nikon D90 is one of the newer Nikon cameras. It comes with a detachable lens that is compatible with other Nikon lenses.
The Nikon D90 uses a Nikon F lens mount type.
The Nikon D90 camera uses a Nikon F-mount type.
Yes, a Sigma 10-20mm lens can fit a Nikon D100, provided you have the version of the lens designed for Nikon mounts. The D100 uses the Nikon F-mount, which is compatible with many Sigma lenses designed for Nikon cameras. Just ensure the lens is in good condition and compatible with the D100's autofocus system, as the D100 is an older model.
The Nikon D90 is compatible with a wide range of Nikon F-mount lenses, including both DX and FX lenses. It can also work with third-party lenses that are designed for Nikon cameras. However, some older lenses may not have full compatibility with all features of the D90, so it's important to check compatibility before purchasing.
The Nikon D90 does have plenty of lenses, and is generally regarded as an excellent camera.
Yes, the Nikon D90 Digital SLR has image stabilization.
The Nikon D100 6.1 Digital SLR Camera is currently priced at $150. However, there are other Nikon D100 products that cost from about $6.99 to $200.00.
The D100 is long obsolete
You can purchase a Nikon D90 battery charger at camera stores, electronics retailers, or online on websites like Amazon or the Nikon official website.
Yes.
The Nikon D90 will indeed connect to a printer wirelessly, but make sure you have a compatible printer first.