ZS40/TZ60 vs the competition

Started Feb 14, 2014 | Discussions thread
Aberaeron Senior Member • Posts: 5,780
Re: EVF and Battery Drain

21st Hermit wrote:

Aberaeron wrote:

panoptic wrote:

"As a test I was able to record a 2:19 H:M continuous video with the FZ47, it was 19GB. The limit was the battery. I would expect the ZS40 to do half that, more than enough. Had an EVF T-Z been available then, I would not own the FZ47."

Using the EVF should extend battery life considerably--less power draw than the screen. Will be interesting to see how much.
Larry Burt

I wouldn't bank on that. The information I recall is that the EVF uses more energy than the LCD screen.

While doing a Google search (many posts with the question, no answers) I could neither confirm or deny your assertion, some things to consider:

  • An EVF will consume significantly more power than an OVF, because both the sensor and the display must be on to work. In an OVF nothing is on until the shutter is pressed.
  • In live view mode, an OVF camera would have to turn on both the sensor and display
  • The LCD having a larger area to illuminate than an EVF would seem to draw more power, in either case the sensor is on

Please post if you can find THE answer.

-- hide signature --

Lost in the Colorado Mountains!!!

Not THE answer, but from camera labs about a Sony. Fairly sure I had the information from my Sony A57 manual, but can't be sure and it isn't to hand at the moment.

Anyhow, from here….


The NEX-7 uses the same NP-FW50 infolithium battery as the NEX-5N. Battery life is quoted as 335 shots under CIPA conditions and my experience suggests that's about right using the LCD and EVF in roughly equal proportions. The EVF consumes more power than the LCD screen so if you rely on it exclusively that figure will probably drop to around 300 shots, END QUOTE.

Logic indicates that if the LCD is used exclusively, then even more than 335 shots would be possible, perhaps 370, ergo LCD uses considerably less energy than the EVF. The accuracy of the above is not certain.

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