In this tutorial, Telescope Live tutor Nik Szymanek demonstrates how to efficiently resample large astrophotography datasets using PixInsight, making advanced processing more manageable on lower-spec systems. Working with 119MB sub-exposures from a QHY-600M CMOS camera, Nik shows how to reduce file size without sacrificing quality. Key steps include:

Setting Up ImageContainer and Output Directory:
- Load full-size files into PixInsight’s ImageContainer and configure a dedicated output folder for resampled images.

Using the Re-sample Process:
- Open a reference image, input scaling values (e.g. 60%), and preserve aspect ratio to downscale the dataset to half its original size.

Executing the Batch Resample:
- Drag the ImageContainer into the Re-sample tool, monitor the resampling process, and manage minor warnings about astrometric data.

Post-Resample Integration:
- Combine the resampled images into SHO masters and apply tools like Blur Exterminator and Star Exterminator with improved speed and efficiency.

This tutorial offers a clear, repeatable workflow for reducing data overhead while maintaining processing quality.