> For the complete documentation index, see [llms.txt](https://release-notes.fotokite.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://release-notes.fotokite.com/fotokite-sigma-release-notes-v61-maintenance.md).

# Fotokite Sigma Release Notes v61 (Maintenance)

## System

<table><thead><tr><th width="362"></th><th>Version</th></tr></thead><tbody><tr><td>Fotokite Live</td><td>Windows: 3.3.5<br>Android: 3.3.5<br>iOS: 3.3.5</td></tr><tr><td>Fotokite System</td><td>Production v61<br>Axon-Production v26</td></tr></tbody></table>

## **Fotokite Sigma system compatibility with different propeller models**

This update adds Sigma system compatibility to new Fotokite approved propeller models.

After this software update, it is not necessary to switch to a new propeller model. Customers can continue using their systems as is and use up any replacement propellers they currently have.

When new propellers are needed, customers can order them directly from Fotokite but they will need to contact Fotokite for a one time configuration of their Fotokite System to adapt it to the proper flight characteristics of the new propeller model. Once that is completed, customers will be able to use the new propeller model for the lifetime of the Fotokite system. Please contact your Fotokite sales representative to order new approved propellers. If you have any questions, please reach out to Fotokite Support at <support@fotokite.com>.\
\
Also included in this update are further improvements to the Fotokite Sigma system's emergency landing behaviors.