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The 12V DC Power Adapter converts 
the 12V DC input to a 7.4V output to 
the camera.
Connect the 12V DC Power Adapter 
as follows:
1.  If you are using the 21128 or 

21129 models, which include the 
DR-E5 and DR-E8 DC coupler 
(labeled on the coupler itself), 
respectively, plug the right-angle 
mini plug of the coupler cable into 
the hole in the coupler (see 

Figure 1). If you are using the 21127 or 21130 

models, with their DR-E6 and DR-400 couplers, respectively, the coupler 
cable is permanently attached to the DC coupler from the factory (

Figure 2).

2.  Insert the correct DC coupler into the empty battery compartment of your 

camera.

3.  Now connect the other end of the coupler cable to the output cable of the 

12V power adapter.

4.  Lastly, connect the power adapter’s cigarette lighter plug to your 12V field 

battery. The power indicator light on the adapter body should illuminate.

5.  Turn on your camera and start shooting pictures!
When finished, first turn off you camera, then unplug the cigarette lighter plug 
from the 12V battery. Finally, remove the DC coupler from your camera’s battery 
compartment.

Specifications

Power Adapter

Power input 

12V (10 – 24V)

Power output 

7.4V, 4A

Connectors 

• Cigarette lighter style, fused, male 
• 5.5mm/2.1mm, male

Size  

3.5" (88mm) x 1.5" (37mm) x 1.2" (30mm)

Cable length 

Adapter input: 10.5" (26.7cm) 
Adapter output: 48" (121.9cm)

DC Couplers
Compatibility

 

DR-E5 – fits Canon EOS 450D (XSi), 500D (T1i), 
1000D (XS)

 

DR-E6 – fits Canon EOS 5D Mark II, 5D Mark III, 
6D, 7D, 60D, and 60Da

 

DR-E8 – fits Canon EOS 550D (T2i), 600D (T3i), 
650D (T4i), 700D (T5i)

 

DR-400 – fits Canon EOS 300D, 10D, 20D, 20Da, 
30D, 40D, 50D

Connectors 

For DR-E5 and DR-E8: 3.0/1.1mm right-angle 
male mini plug; 5.5/2.1mm female

 

For DR-E6 and DR-400: 5.5/2.1mm female (other 
end is permanently attached to coupler)

Cable length 

~6.6 feet (2m)

Figure 1. 

Parts of the 12V DC Power Adapter

Figure 2. 

Coupler cable is permanently 

attached to the DR-E6 and DR-400 
couplers.

To DSLR

To 12V battery

DC coupler

Coupler cable

Power light

Power output cable

Power adapter

Cigarette 

lighter plug

Right-angle  

mini plug

WARning:

 

Never look directly at the Sun with the naked eye or with 

a telescope – unless you have a proper solar filter installed over the 
front of the telescope! Otherwise, permanent, irreversible eye damage 
may result.

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