So what do you do when you're going nuts because it's been raining for several days? I watch YouTube reviews of lenses. I wondered whether I needed a 40mm f/1.4 lens. All I have for this camera is the Tamron 28-75 lens and 40mm is certainly there - it's really my favorite all-round focal length. I fell in love with that with the Panasonic 20mm f/1.7 lens for my first micro43 camera. It's equivalent focal length was 40mm. I found I cropped least with it. Tried to set this Tamron to 40mm, but there is no marking on the lens telling you what the zoom millimeters are.