Vanilla Zoom

Vanilla Zoom is a client-side mod which adds functionality to zoom on-the-go via a hotkey. In 1.17, the Spyglass item was added to Minecraft. If you're like me, you've probably never found a use for it. It's a hassle to bring with you in the hotbar, and selecting it even more so. The zoom function is incredibly useful though. And with this mod, you'll be able to use it anywhere. Think of it as spawning with a spyglass, in any world.

By default the hotkey used to zoom in is Left Alt, but this can be set in the Keybind menu. While pressing this, a spyglass item is temporarily added to the offhand. The spyglass is automatically used, until the hotkey is let go. This will also make the spyglass item disappear again. Any held item in the offhand will return as soon as the hotkey is unpressed.

Zooming in with the hotkey:

The Hotkey:

You may freely use this mod in any modpack, as long as the download remains hosted within the CurseForge or Modrinth ecosystem.

Serilum.com contains an overview and more information on all mods available.

Comments are disabled as I'm unable to keep track of them across so many separate mod pages.
For issues, ideas, suggestions or anything else there is the Github repo. Thanks!