Questions tagged [power]

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votes
3answers
68 views

power out though USB port [closed]

Does anyone know how much power out we can get from the USB port in a DSLR camera. Is it possible to get an output like 3.7v 1500mAh battery can supply from a DSLR?
1
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0answers
60 views

EOS 400d: won't turn on?

I have the EOS 400d - also known as EOS Digital Rebel XTi, or Kiss Digital X in Japan - and as of tonight, it stopped working. It won't do anything, with or without batteries or a CF card, except ...
1
vote
0answers
21 views

Connecting Sunpak 2-pin flash plug to JJC BP external battery pack

Would you have any suggestions about hooking up the JJC BP (the one with interchangeable power cable for Nikon, Canon, Sony) to a Sunpak DR12X or 36DX flash with 2-pin plug? Would you know the ...
1
vote
3answers
207 views

Why is flash power given in watt-seconds (Ws) and not joules (J)?

Flash manufactures often (always) specify the power in watt-seconds (Ws), and not in the SI unit joules (J). See and example for the Godox studie flash QT series. Since the unit conversion says that ...
5
votes
6answers
733 views

Can I maintain the same flash pulse duration but increase light with multiple flash units?

I own a Yongnuo YN-560 III speedlite, and I found out that it lets me freeze motion (for example, a water splash) at 1/16 of its power. However, the amount of light at 1/16 is not enough to properly ...
1
vote
1answer
310 views

How can I use my Olympus OMD E-M10 with a continuous power source?

I'm looking to shoot a time lapse with my Olympus OMD E-M10 and I was wondering it it is possible to use an external power source. Standard battery life isn't too good on this camera; it only takes ...
2
votes
2answers
609 views

Can I do anything about a Nikon d750 taking 5 minutes to power on after taking saltwater damage?

I have had a Nikon d750 for a year or so, and 6 months ago it took on a bit of saltwater damage. It still works, but twice in the past it wouldn't power on, once for two weeks and once for two days. ...
2
votes
4answers
78 views

Can I dim lights by making amount of power smaller?

Can I dim lights by making amount of power smaller? I'm using Falcon Eyes LH-ESB6060K lighting kit. I thought, It should be possible, but is it safe? And is there any other way to dim it?
1
vote
1answer
226 views

My Canon 50D is always on. What can I do to minimise battery loss?

The on/off switch on my Canon 50D is broken - as long as the battery is charged, the camera is on. I have set the automatic shutdown to 1 minute and try to avoid accidentally turning on Live View or ...
14
votes
1answer
2k views

Why are battery consumption numbers for flagship Nikon and Canon cameras so different?

I have been looking to acquire new gear and I came across a curious fact regarding the two flagship cameras. The Nikon D5 has a battery capacity of 27Wh (2500mAh, 10.8V), and a CIPA battery life of ...
2
votes
2answers
6k views

Why is my Canon 600D not turning on?

My Canon 600D was working fine till the last two months when issues started rising. When I switch it on, I don't see the red blinking light and it's not turning on. The last time, I removed the ...
0
votes
1answer
144 views

Why camera does not have a USB port to connect to PowerBank for power? [duplicate]

I notice that almost all camera use either a proprietary Li-ion battery or AA size battery for power. May I know what is the reason for not having a camera that have USB port that can be connect to a ...
1
vote
2answers
175 views

In a multiple strobe setup, how powerful must each strobe be?

I am about to buy my first strobe set. I want to do portrait photography, both in a home studio and outdoors. No weddings, no events, no more than one model at a time. I see that a complete set ...
0
votes
1answer
137 views

Is always leaving power on bad for CMOS?

I am pretty new to DSLR, and there is one thing I am curious about. I watched some videos and heard from my friends that it is ok to turn the power button on even you do not use the DSLR (camera will ...
1
vote
1answer
320 views

Is it normal for the left pin on the Nikon SB-910’s 3-pin external power source terminal to be deeply recessed?

I’m examining the external power source terminal of my newly purchased Nikon SB-910 speedlight. (The terminal is for connecting an external battery pack. It is located on the front side of the ...
0
votes
1answer
395 views

External power for compact camera?

I would like to experiment with time lapses using compact cameras (like Coolpix S6300), as I don't want to put an extreme number of clicks on my DSLR for the moment. Are there any solutions for ...
0
votes
2answers
263 views

Canon T5i (lp-e8) high capacity battery grip/battery bank?

I have two Canon lp-e8 batteries that I use for my T5i but they run out of battery pretty quickly (only 1,120 mAh each) and then I'm left with nothing. I have a 15,000 mAh battery bank that I use ...
2
votes
1answer
487 views

Camera suggestion needed for long term remote timelapse

I'm working on setting up a remote timelapse waterproof system for a long term project. The idea is to have it on solar power. I'm currently playing with the CHDK firmware on a Canon PowerShot Elph ...
0
votes
2answers
324 views

Battery for Nikon CoolPix L26

I have a Nikon CoolPix L26 digital camera and am using the rechargable battery that came along with it. It is a 1.2V / 2100 mAH battery (Infinite brand) Even when I fully recharge the battery and use ...
5
votes
8answers
6k views

Why is my Canon 5DMIII draining batteries overnight?

I have a 5DMIII with battery grip (by Canon) and Canon batteries. Since a few days ago, I noticed that, all of the sudden, if I leave the camera unused for, say, one day and turned off, when I turn ...
3
votes
1answer
299 views

What is the efficiency of Bulb mode vs taking multiple shorter exposures?

When looking at taking photos such as star trails where it requires a significant exposure time, is it more power efficient to use Bulb mode or taking multiple shorter exposures? Would keeping the ...
10
votes
3answers
18k views

Canon DSLR USB Chargers?

I'm wondering if there are any USB chargers available for canon DSLRs. I often head out for extended periods of time without electricity with my camera gear which always makes me nervous about when ...
6
votes
6answers
17k views

Err 80 appears when I turn on my Canon EOS 5D Mark II

Recently when on holiday in Italy my 5DII stopped powering up. Turn the switch on and - nada. Pulling the battery and popping it back in brings the camera to life, however as soon as the camera goes ...
6
votes
4answers
416 views

Are there any ways to combat “sluggish battery syndrome”?

For anyone who has done any extensive photography in very cold weather (weather below freezing), I'm sure they have encountered "sluggish battery syndrome". This is where the camera battery, when it ...
41
votes
10answers
25k views

What are the dangers of removing a lens while the camera is on?

The manual warns that you should turn the camera off to remove the lens, but it doesn't say why. I suspect this may have to do with dust, but I could imagine there are lots of other reasons. I'm ...