Low power fixed are typically a compact scope but a 40mm OBJ is certainly useful on a 2x variable. Just compare the FOV. Ive got a 2-7x40 with 60ft FOV on 2x. Ive seen 2Xs with a 50mm exceeding 70ft FOV. Most 2Xs with a 32mm OBJ are lucky to break 45ft.A low power fixed scope gains nothing with a big objective because , basically, there is less crap inside to filter the light.