Using a USB Video Capture Adapter for Telescope Imaging
By TelescopesPlus - The #1 Online Store for Telescopes and Accessories | Published: 2026-10-24
Category: How-to Guides
Learn how to use a USB video capture adapter to turn your telescope camera into a live imaging tool. Step-by-step setup for planetary imaging and more.
Quick Answer
A USB video capture adapter lets you connect your telescope camera to a computer for live viewing, recording, and stacking. The Revolution USB Video Capture Adapter (RI-USB) is an affordable way to start.
Why a USB Video Capture Adapter Matters
A USB video capture adapter bridges your telescope camera and your computer, letting you see what your camera sees in real time. This is especially useful for planetary imaging, where you record short video clips and then stack the best frames to reveal detail.
The Revolution USB Video Capture Adapter (RI-USB) is designed to work with the Revolution Imager, but it also opens the door to software like SharpCap and AstroToaster for live stacking. This means you can watch faint objects gradually appear on your screen as the software combines frames.
What You Need to Get Started
Before you begin, make sure you have the adapter, your telescope camera, a computer with a USB port, and the software you plan to use. The RI-USB adapter is a small, affordable device that connects your camera's video output to your computer's USB input.
Check that your computer meets the software requirements and that you have the latest drivers installed. Most capture software works with standard UVC devices, so the adapter should be recognized without extra drivers.
Choosing the Right Software
SharpCap and AstroToaster are popular choices for live stacking. SharpCap offers a free version and is great for planetary imaging. AstroToaster is designed specifically for the Revolution Imager and simplifies the stacking process.
Each software has its own learning curve. Start with the one that matches your camera and your goals. For planetary imaging, you'll want software that can record high-frame-rate video and then stack frames.
Step-by-Step Setup Guide
- Connect the adapter: Plug the Revolution USB Video Capture Adapter into your computer's USB port, then connect your telescope camera's video output to the adapter. Use the included cable if available. Check that the camera is powered on before connecting to the adapter.
- Install and open your capture software: Install SharpCap or AstroToaster on your computer and open it. The software should automatically detect the adapter as a video source. If not, check your drivers and try a different USB port. Make sure you have the latest drivers for your adapter and camera.
- Select the video source: In your software, select the USB video capture adapter as the video source. You should see a live image from your telescope. Adjust the resolution and frame rate for the best balance between detail and smoothness. Start with a lower resolution if the image is choppy.
- Focus and align your telescope: Use the live view to focus your telescope. For planetary imaging, center the planet in the field of view and fine-tune the focus until the image is sharp. Use a Bahtinov mask or a bright star to achieve precise focus.
- Record and stack: Record a short video clip of your target. For planetary imaging, record 30-60 seconds. Then use your software's stacking feature to combine the best frames into a single sharp image. Record more frames for better results, but avoid overexposure.
Product Spotlight
- Revolution USB Video Capture Adapter - RI-USB: The Revolution USB Video Capture Adapter allows you to capture images and videos from the Revolution Imager to share with the world. This lets you record your telescope sessions and share them, turning a solo observation into something you can show others.
Revolution USB Video Capture Adapter - RI-USB
