The invention is concerned with a zoom lens that is well fit for a digital type single-lens reflex camera, has improved optical performance, and is bright all over the zooming zone. In one aspect, a sensing period is determined by when the reference sense amplifier sensing a reference current detects an expected state. The INL values are then used to compensate for the ADAC’s distortion in the digital domain. One of the conductive layers includes a second portion forming a series inductance between one of the feed connection conductors and at least one of the antenna elements. The new variety is a Gazania, normally produced as an outdoor garden or container plant. The drive circuits of the invention are simple, and require only a few components.