Adorama has a great deal on the terrific Tamron SP EF 45mm f/1.8 Di VC USD w/Tap-in Console until tomorrow morning at $389 (Reg $659).
This lens will work with the EF to RF adapter or your Canon EOS DSLR.
Tamron 45mm f/1.8 Key Features
EBAND Coating deployed to thoroughly suppress ghosting and flare
Fluorine coating on the front element repels water and fingerprints
Circular aperture for enhanced bokeh
Fixed Focal Length: 45mm Lens
Maximum Aperture: f/1.8
Image Stabilization Type: Yes (VC)
Lens Series: Tamron Di Series
Special Features: Aspherical
Tamron SP EF 45mm f/1.8 Di VC USD w/Tap-in Console $389 (Reg $659)