A Focusing Lens is an upgrade that boosts the throughput (speed) of Laser Energy Transmitters.
Lenses are crafted out of either mob drops or crystals found deep underground. Some lenses provide a linear/flat boost to the PPS, while others provide a percentage improvement.
In the early game with Basic, Mk 1 and Mk 2 Laser Energy Transmitters, it is recommended to use the flat-boost lenses (Diamond, Emerald, Ruby & Sapphire) as it will give you a better boost. e.g. A Mk 2 Laser with a Sugalite (+200%) lens provides less boost than a Sapphire (+100 PPS)
Once you have Mk 3 Lasers, it is recommend to switch to a percentage-boost lens as most will provide a better boost than the best flat-boost lens (Sapphire).
|Diamond Focusing Lens||Increase by 15 PPS|
|Emerald Focusing Lens||Increase by 30 PPS|
|Ruby Focusing Lens||Increase by 60 PPS|
|Sapphire Focusing Lens||Increase by 100 PPS|
|Topaz Focusing Lens||Increase by 150% (2.5x throughput)|
|Sugalite Focusing Lens||Increase by 200% (3x throughput)|
|Crude Organic Lens||Increase by 25% (1.25x throughput)|
|Organic Lens||Increase by 100% (2x throughput)|
|Exceptional Organic Lens||Increase by 250% (3.5x throughput)|
|Polished Chrome Lens||Increase by 400% (5x throughput)|