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- From: daveb@hpgrla.gr.hp.com (Dave Boyd)
- Date: Thu, 24 Dec 1992 17:13:30 GMT
- Subject: Re: EOS battery use - Some hard numbers
- Message-ID: <2300091@hpgrla.gr.hp.com>
- Organization: Hewlett-Packard, Greeley, CO
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!cs.utexas.edu!sdd.hp.com!col.hp.com!news.dtc.hp.com!hpscit.sc.hp.com!hplextra!hpfcso!hpgrla!daveb
- Newsgroups: rec.photo
- References: <1992Dec23.234312.4870@cbnewsm.cb.att.com>
- Lines: 32
-
- In rec.photo, ka1gt@cbnewsm.cb.att.com (robert.m.atkins) writes:
-
- >I just measured some current draw data for an EOS 630 with a 35-135 USM lens
- >which might be of interest:
-
- >Lens focusing (from infinity to closest focus) 200mA for 0.25 seconds
- >Film winding (1 frame) 600mA for 0.25 seconds
- >Mirror fliping up & shutter release 350mA for 0.1 seconds
- >Exposure determination (i.e. depress shutter
- >release 1/2 way to give exposure reading) 100mA for 6 seconds
- >Film rewind (36 exposures) 450mA for 8.5 seconds
- >Any function button 100mA
- >(current is drawn until function is set)
-
- >Maximum current drawn was a 1.6 amp transient on motor start up
- .
- (stuff deleted)
- .
-
- Good post, Bob. Looks like exposured determination is a surprisingly
- power-hungry activity. That would explain my slightly-shorter-than-spec
- battery life since I do a lot of "let's see how much light we've got here"
- tests by looking through the camera and pressing the button halfway.
-
- Did you try to look at the energy consumption of the flash? I think
- that Canon specs the batteries for about 1/4 as many rolls if flash is
- used often.
-
- Dave Boyd
- Hewlett-Packard, Greeley, Colorado
- Standard Disclaimers Apply
-
-