I went to the market to see if I could get some focus lens. I discovered that there is a greater version and it requires 4 (four) regular lenses.
The Warframe's wikia says nothing about obtaining it besides quest completion.
3 Answers
From this Steam post there appear to be three good ways to obtains lenses:
- Sorties
- Trade
- Buying them from the market
They mention that you can purchase even better lenses from the market as well.
The Wiki also states:
Currently, Focus Lenses can be acquired through completing Sortie missions, and can be traded between players, while Greater Lenses can be crafted with a blueprint, or bought with Platinum from the market.
This is essentially the same thing the players talked about in the Steam post with the addition of crafting them.
1With the current warframe build, focus lenses can be obtained from:
- Trade with other players (including regular lenses, greater lenses, and eidolon lenses)
- Market purchase (Greater lenses or Greater lens blueprints only)
- Ostron Bounties (regular lenses only)
For the lenses obtained through Ostron bounties, the type of lenses are random and changes when normal bounty rotation happens.
The wiki fully details where/how you can obtain lenses and blueprints, and offers a helpful guide for acquiring focus as well.
[Regular] lenses can be acquired as rewards from Bounties (level 20-40 and 30-50) offered by Konzu in Cetus on the Plains of Eidolon. Alternatively, they can also be traded between players.