The telescope was created for all those times you wanted to get your eyes a little closer to the beauty. The telescope will zoom your view in when you right click, and also smooth your mouse movement. It has three zoom modes. Simple, but effective.
If you’re having problems please reinstall ModLoader. Then make sure you deleted META-INF from minecraft.jar. If that doesn’t work, and you’re sure you reinstalled modloader just now, it could be a blockID or itemID conflict. These mods will automatically create a file in (minecraft folder)/mods/DJoslin/, open that file and change the ID to an unused one.
For Minecraft 1.5.2
For Minecraft 1.5.1