Is the samyang af 45mm f 1 8 fe good in low light?

Here is what the site says about that.

From Samyang AF 45mm f/1.8 FE: Samyang AF 45mm f/1.8 FE: A prime lens by Samyang for Full frame cameras, 45mm f/1.8. Specs - Maker: Samyang - Focal length: 45mm (prime) - Maximum aperture: f/1.8 - Made for: Full frame sensors - Mounts: Sony E - Stabilised: no - Autofocus: yes What it frames like - On full frame (Sony E): as marked, 45mm. - On APS-C (Sony E): like 68mm on full frame; f/1.8 gives about the depth of field ...

From Samyang AF 85mm f/1.8 P FE: Samyang AF 85mm f/1.8 P FE: A prime lens by Samyang for Full frame cameras, 85mm f/1.8. A very light 85mm portrait lens at about 270 grams.

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