The correct spark plug and gap is crucial to proper ignition. Spark discharge is a breakdown in the air insulator between the electrode and ground. Yes - air is an insulator, a pretty good one at that. As voltage builds at the electrode, atoms in the air within the air gap gain electrons. This process is called ionization.
It's one of the reasons why our standard lenses are polycarbonate (thinner than standard lenses typically sold by other eyeglasses retailers). At Warby Parker, you can upgrade to high index lenses for an additional $30 whereas it typically costs $60 to $100 more.
TOTAL: $6,497. With these EF lenses combined, you have a versatile focal range that you can work with no matter what situation you find yourself in. These dream team lenses are what you can expect to purchase if you buy a full-frame camera from Canon (Canon 6D, 5D MarkII, 5D MarkIII, 1D X, 1Ds MarkIII).