Comparison between YS-D2 and the YS-D1/SEA&SEA

Comparison between YS-D2 and the YS-D1

  YS-D2 YS-D1
Maximum Guide Number
(ISO 100, land)
32
Minimum Guide Number
in DS-TTL mode (ISO 100, land)
1 3.7
Beam Angle 80°x80°(without Diffuser) / 100°x100°(Diffuser 100) / 120° x 120°(Diffuser 120)
Batteries x4 AA batteries - same type and make (1.5V Alkaline or 1.2V Nickel Metal Hydride)
Number of Flashes *1 AA Alkaline batteries: 150 / Nickel Metal Hydride: 200
Recycle time (full) *2 Nicel metal hydride: 1.5 sec Nickel metal hydride: 1.9 sec
Color temperature 5600K
Depth rating 100m
Exposure control DS-TTL ll / Slave TTL / Manual (11 steps)
EV Exposure Compensation Function ±2.0EV ±1.5EV
Controls Power Switch (rotary magnetic)
Light Level Control Dial (rotary magnetic)

Target Light Switch
Power Switch (knob)
Light Level Control Dial (knob)
Target Light Switch
Control Panel Illumination Backlit Illuminated Panel
(aqua blue / blue / green / orange)
-
LED Target Light 2-Step Power Settings
(100/300 lumen)
(100 lumen)
Light Emission Detection Function *3 -
Voltage Correction Function *4  
Audible Charge Signal -
Custom Mode *5 -
Auto Power-Off Function ○ (30 minutes)
Sync Cord 5-pin Sync Cord-N / Fiber-Optic Cable
Over-pressure relief valve
Dimensions (WxHxD) 89x133x116mm / 3.5x5.2x4.6 inches
(incl. YS base, excluding protruding parts)
87x135x111mm / 3.5x5.4x4.4 inches
(incl. YS base, excluding protruding parts)
Weight 623g / 22.0oz
(with YS mount and bolt, without batteries)
610g/21.5oz
(with YS mount and bolt, without batteries)
Underwater weight *6 Approx.+40g / 1.4oz (incl. batteries) Approximately + 0.5g / 0.2oz (incl. batteries)
Accessories Diffuser 100 / Diffuser 120 / Silicone Grease /Strobe Ball-Base (improved) / Fixing Bolt (improved) / Hex Wrench / Red Filter (x2) *7 Diffuser 100 / Diffuser 120 / Silicone Grease / Strobe Ball-Base / Fixing Bolt / Hex Wrench