✦ Astro Filter

1 Camera Setup

Database Custom

Brand

Model

Sensor Format

Megapixels

Sensor Specs

Sensor —

Resolution —

Pixel Size —

Megapixels —

2 Min. Resolution

1024 × 1024 px

Higher values need longer focal lengths.

3 Deep Sky Catalog

4 Results

🔭

Select a camera and one or more targets to see focal length recommendations.

1 Equipment Setup

Camera

Brand

Model

Telescope

Brand

Model

Equipment Specs

Sensor —

Pixel Size —

Focal Length —

Focal Ratio —

Image Scale —

FOV —

2 Min. Resolution

1024 × 1024 px

Objects must span at least this many pixels to be listed.

3 Matching Objects

🌌

Select a camera and telescope to see which deep sky objects you can image.

📷 Image Credits

All thumbnail images are sourced from Wikipedia / Wikimedia Commons.

✦

Welcome to Astro Filter

Your deep-sky imaging planner

Astro Filter helps astrophotographers plan their imaging sessions by matching equipment to deep-sky targets. Choose from two powerful modes:

🔭

Telescope Finder

Pick a camera and one or more deep-sky targets, and Astro Filter calculates which telescopes give you the focal length and resolution you need.

🌌

Object Finder

Already own a telescope and camera? See every deep-sky object your setup can resolve, sorted by pixel coverage and mosaic requirements.

⚠️ Entertainment only. This tool is for informational and entertainment purposes. Product prices were retrieved on March 1, 2026 and are likely out of date. Always verify current pricing before purchasing.

📷 Image credits. All deep-sky thumbnails are sourced from Wikipedia / Wikimedia Commons and are used in compliance with their respective licenses (CC BY, CC BY-SA, CC0, Public Domain). Full attribution is available via the Credits button in the header.

💬 Community. Have questions, found a bug, or want to request a feature? Join the conversation on r/astrofilter.

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