Learn Italian: Avrò impostato la fotocamera e scelto la lente. - I will have set the camera and chosen the lens.

Avrò impostato is the Futuro Anteriore (Future Perfect) tense. It is used to talk about an action that will already be fully completed at a certain point in the future. It uses the future tense of the auxiliary verb avere (avrò) plus the past participle (impostato), translating perfectly to "will have set".

Why is there no helper verb before scelto?

In Italian, just like in English, when you connect two verbs in the same compound tense with e (and), you do not have to repeat the auxiliary verb if it is exactly the same for both. Since both actions use avrò, you can just say avrò impostato... e scelto instead of repeating avrò.

Is scelto an irregular past participle?

Yes! It comes from the verb scegliere (to choose). Instead of a regular ending, it takes the irregular form scelto. It is a great one to memorize since it is a very common verb.

I usually see "camera" translated as macchina fotografica. Is fotocamera different?

They mean the exact same thing and are generally interchangeable. Macchina fotografica is the traditional term, while fotocamera is a slightly more modern, single word that is especially common when talking about digital cameras or the camera built into your smartphone.