The MountCam A2 is based on the same design as the A1, with a 174 mm offset and an additional adapter.
This adapter is what sets it apart: it accommodates cameras with motorized varifocal lenses —the BulletCam HLVF and TurretCam HLVF—whose housings are larger than those of fixed-focus models. Dimensions: 86 × 136 × 174 mm.
