This is the lens that will focus and capture the full 35mm frame. Also useful up to 6x9.
Seldom available, always expensive, now an eBay seller has a few at a reasonable price.
Lots of good news here: He has them. I can vouch for him; seller and product are legit. His shipping costs are very reasonable. For iPhone 6, 6s, 7, regular and plus only (using this lens requires one of the included mount adapters).
Bad news: His shipping from Turkey by their post is not fast.
p.s. I am only a satisfied buyer from this seller. I have no financial interest whatsoever.