In this tutorial, Telescope Live tutor Nik Szymanek demonstrates how to reduce file sizes and streamline processing by resampling large datasets in Astro Pixel Processor (APP). Using an SHO dataset of the Eta Carina Nebula captured with Telescope Live’s FSQ-106 and QHY-600M setup, Nik outlines a practical workflow for handling high-resolution data on less powerful machines. Key steps include: Batch Resampling Workflow: - Learn how to reduce full-size FITS images using APP’s Batch Rotate & Resize tool, applying a scale factor to preserve detail while enabling more efficient processing. Workaround for FITS Header Quirk: - Understand how resampling can affect filter metadata, and learn how to correctly reload and organize H-alpha, OIII, and SII files to avoid stacking errors. SHO Integration and RGB Combination: - Create master frames for each channel and combine them using the Hubble SHO palette. The tutorial also includes tips for resolving filter recognition issues in APP. This tutorial provides a clear method for balancing quality and performance in large-scale astrophotography projects.

In this tutorial, Telescope Live tutor Nik Szymanek introduces the latest version of GraXpert, a free AI-powered tool for astrophotographers. Nik demonstrates how to process a dataset of NGC 660 using GraXpert’s intuitive workflow, including gradient correction, deconvolution, and denoising. Key steps include: Interface Overview and Setup: - Install GraXpert, download required AI models, and prepare your image with basic cropping to remove dithering artefacts. Gradient Removal with AI Background Extraction: - Use the AI mode for a simplified alternative to PixInsight’s DBE, with sigma and saturation controls for fine-tuning. Deconvolution and Denoising: - Apply AI-based deconvolution and denoising with recommended starting values, using preview modes to compare results. Saving and Exporting: - Save the final image in 32-bit FITS or 16-bit TIFF format, optionally retaining the applied stretch for further editing in Photoshop or Affinity Photo. Nik’s walkthrough shows how GraXpert can streamline core astrophotography tasks with minimal complexity.