# Changing Lenses {% embed url="" %} ### Changing Lenses/External Modules If you change the lens or add/remove an external module to the gimbal, go through the following steps to make sure the gimbal is configured to work with the new setup. 1. To balance the gimbal, first remove the lens cap from the lens. 2. Loosen the two finger screws on either side of the payload. 3. Move the camera forward and backward within the gimbal to achieve the correct balance. In general, you'll want to move the camera back for heavier/longer lenses and forward for lighter/shorter lenses. Shift camera foward and backward in the gimbal until the camera does not tip up or down when it is positioned horizontally and released. 4. To ensure the camera is very well balanced, test pointing the camera \~30 deg up/down; a well-balanced camera will not move in either of these two positions. 5. Once you achieve a good balance, tighten the finger screws so your camera stays firmly in place. {% hint style="warning" %} Loose screws can result in poor stabilization {% endhint %} 6. With the gimbal already connected, power on Astro 7. The gimbal may have weak motor power for up to 30s on bootup, before the gimbal is reconfigured by Astro with different tuning based on the lens. {% hint style="info" %} If you are using different lens or have otherwise modified the payload such that the default tuning isn't working, see the advanced gimbal tuning section If you are using one of the four supported lenses, you shouldn't need to do this {% endhint %} --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.freeflysystems.com/ecosystem/payloads/lr1-payload/lr1-lenses-and-expansion/changing-lenses.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.