Telescope Lens is an unlockable trinket in The Binding of Isaac, added in the Repentance DLC.

+9% Planetarium chance.
raises the default chance for a Planetarium to spawn from 1% to 10%.

This also works after having entered a Planetarium, resetting the chance to 10% instead of 1%.

Allows Planetariums to appear in Chapter 4.

This page shows the latest information as of the new Repentance+ (Online Co-op) DLC.
To see information about this trinket for the previous Repentance version, check this page instead.

Obtain any 3 items with the stars tag in a single run.

The following tags are applied to this trinket:

The following special synergies and interactions for Telescope Lens have been documented.

* Note that not all possible synergies and interactions are listed here.

Below is the Internal Item Description as shown in-game.
Note that some stat changes are not displayed here. Please see the main description for the full effects.

Telescope Lens

• Increases the chance of a planetarium spawning by 9%
• Golden Trinket (without Mom's Box): Increases the chance of a planetarium spawning by 18%
• Mom's Box: Increases the chance of a planetarium spawning by 18%
• Mom's Box + Golden Trinket: Increases the chance of a planetarium spawning by 33%
• Planetariums can spawn in The Womb and Corpse
• Mom's Box + Golden Trinket: Planetariums can spawn in The Cathedral and Sheol

• Check out the trinket description on the external Isaac Wiki.