Canon RF 50mm f1.8 STM: A Compact Prime for EOS R5 II

By Foto Erhardt | Kameras, Objektive & Zubehör ► günstig kaufen | Published: 2026-10-20

Category: Product Reviews

Learn how to set up and use the Canon RF 50mm f1.8 STM on your EOS R5 II, including focus modes, image stabilization, and creative shooting tips.

Quick Answer

The Canon RF 50mm f1.8 STM is a lightweight, compact prime that pairs beautifully with the EOS R5 II, offering sharp images and creative bokeh. Here’s how to set it up and get the most from it.

Why This Lens Works on the R5 II

The Canon RF 50mm f1.8 STM is a versatile walk-around lens that keeps your kit light—it weighs just 160g and is only 40.5mm long. On the EOS R5 II, its bright f/1.8 aperture allows for selective focus and low-light shooting without a flash.

Because the lens is so small, it balances well on the R5 II body, making it ideal for street photography, portraits, and everyday carry. The STM motor ensures quiet autofocus, which is especially useful when recording video.

Trade-offs to Keep in Mind

While the RF 50mm f1.8 STM is excellent for many situations, it’s not a macro lens—minimum focus distance is limited, so you can’t get extremely close to subjects. Also, the plastic build and lack of a control ring mean fewer physical controls compared to higher-end RF primes.

For critical work like professional studio shoots, you might prefer a faster or weather-sealed lens, but for most users, this compact prime offers outstanding value and image quality.

How to Set Up and Shoot with the RF 50mm f1.8 STM on the EOS R5 II

Mount the lens securely: Align the red dot on the lens with the red dot on the camera body, then rotate the lens clockwise until it clicks into place. You should hear a solid click—if not, remove and remount. Always check the lens is locked before powering on.
Set focus mode: On the lens, slide the AF/MF switch to AF for autofocus. For manual focus, switch to MF and use the focus ring. In MF, the camera’s focus peaking (if enabled) can help you nail sharpness. Remember to switch back to AF when you’re done with manual focus.
Choose an aperture for creative control: Set the camera to Aperture Priority (Av) mode and dial in f/1.8 for a shallow depth of field with creamy bokeh, or stop down to f/8 for sharper landscapes. Use the camera’s rear dial to adjust. At f/1.8, be careful with focus—use single-point AF on the subject’s eye.
Enable image stabilization: The RF 50mm f1.8 STM doesn’t have built-in IS, but the EOS R5 II’s In-Body Image Stabilizer (IBIS) provides up to 7 stops of stabilization. In the menu, ensure IBIS is set to On for stills and video. For video, consider using a gimbal if you’re moving a lot, as IBIS helps but doesn’t replace steady support.
Use the lens for video: The STM motor focuses quietly, making it great for video. Set the camera to Movie mode and use Servo AF to track subjects smoothly. Disable AF assist beams to avoid noise in the recording. Test autofocus speed in low light before a critical shoot.

Product Facts

Canon RF 50mm f1,8 STM: The Canon RF 50mm f1.8 STM is a bright, compact prime with a maximum aperture of f/1.8, an aspherical lens element, and a quiet STM autofocus motor. It weighs only 160g and is 40.5mm long. This makes it a lightweight, affordable choice for everyday shooting on the EOS R5 II, providing sharp images and smooth, silent autofocus for both photos and video.
Canon RF 50mm f1,8 STM