As you know by now Convoy has released a goodie bag of TIR Optics to use with your Convoy S21D. The goodie bag includes 4 optics total, and in the order of decreasing throw and increasing flood they are: 10 Clear, 10 Bead, 30 Bead, 60 Bead.
For anyone new to this, decreasing throw means the hotspot in the middle of the beam becomes less bright, at the same time that the periphery becomes brighter and larger (covers more area). That is the tradeoff between hotspot/throw and spill/flood, like tax, unavoidable. You could see this very clearly in the beamshot below.
Personally and for example, if I like to see further ahead for safety reason, such as during my evening walk, then I prefer the Convoy 10 Clear because its brighter central hotspot means further throw. OTOH, if I am doing close up work, for example repainting the brake caliper of my car, then the floody 60 Bead is much nicer. In this situation a bright hotspot such as with 10 Clear is blinding. The throw measurements below show how optics directly affect how far a light shines (throw). The Sofirn 10 Clear is the optic on Sofirn IF25a that just happens to also fit in Convoy S21D. I’ve also included Emisar throw numbers for comparison.
PS If you are buying a S21D from Aliexpress, at the time of ordering just send a nice note to Simon and asks if he could gift you some extra optics (and please don’t quote my name lol). A pair of 10 Clear and 60 Bead or 10 Clear and 30 Bead would be a nice start IMHO.
S21D with 219b 4500K
1. Sofirn ~10° Clear 170 m
2. Convoy 10° Clear 170 m
3. Convoy 10° Bead 157 m
4. Convoy 30° Bead 144 m
5. Convoy 60° Bead 113 m
S21D with 519a 4500K
Convoy 10° Clear 157 m (using same optic, 519a less throwy than 219b)
Emisar D4V2 219b 4500K
Carlo 10621 Clear 140 m
Carlo 10622 Clear 137 m
Emisar D4V2 E21a 4500K
Carlo 10621 Clear 174 m (using same optic, E21a is more throwy than 219b)
Carlo 10622 Clear 170 m
Carlo 10623 Frosted 111 m (frosted optic makes “hotspot” (central area of beam) of D4V2 w/ E21a very dim)
