Because the sensor assembly is moved electrmagnetically. When there is no power it is essentially free moving.

Ahoy ye hearties! Hoist ye yon Jolly Roger and Cascade away. NGC 1502 The Jolly Roger Cluster:

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This is the equivalent of 43 minutes, 40 seconds of exposure. NGC 1502 is a neat little cluster located in the Camelopardalis Constellation. This region of space was thought to be fairly empty by early astronomers, but as you can see, there is a lot there. Kemble's Cascade (a.k.a. Kemble 1) is named for Father Lucian Kemble, a Canadian Franciscan friar who wrote about it to Walter Scott Houston, an author for the Sky And Telescope magazine. Houston named the asterism for Fr. Kemble and the name "stuck". NGC 1501 is the Oyster Nebula. A longer focal length telescope is needed to bring this one into good viewing range, but it is well worth the effort. NGC 1502: https://skyandtelescope.org/online-gallery/ngc-1502/ Camelopardalis Constellation: https://en.wikipedia.org/wiki/Camelopardalis Kemble's Cascade (and NGC 1501: The Oyster Nebula): https://www.constellation-guide.com/kembles-cascade/ Arrrrrr Matey.

Looking for input; there are some decent deals and might want to take advantage to expand my lenses for my 100s already own: 110/2 32-64 35-70 100-200 + TC   Shooting mostly family shots, bringing my kit to capture family outings indoors and out. Tracking the 63/43 effective FLs on the two, but has anybody used both? Would the 55 (covered by two zooms right now) be redundant? Would the 80 be too similar in character to my 110 for portraiture?

See what I mean? Two instantaneous ads. Worthless.