K20d Off switch.
Posted 17/09/2009 - 12:59
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I have an "Atmos" clock, it keeps almost perfect time without any electrical power, or anybody winding it up. It is however larger than several K20s, so probably not the answer to above.
Davex.
Davex.
Posted 17/09/2009 - 13:01
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George Lazarette wrote:
But there must be a clock battery of some sort.
G
But there must be a clock battery of some sort.
G
davex wrote:
I have an "Atmos" clock, it keeps almost perfect time without any electrical power, or anybody winding it up. It is however larger than several K20s, so probably not the answer to above.
Davex.
This can be easily be verified also, all it takes is just stripping the K20 and try to locate if a battery exists there .I have an "Atmos" clock, it keeps almost perfect time without any electrical power, or anybody winding it up. It is however larger than several K20s, so probably not the answer to above.
Davex.
Let me go look, will be right back soon I check it. Off to the shed now to strip my K20
Amin Photo Gallery
Posted 17/09/2009 - 13:35
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aminstar wrote:
Off to the shed now to strip
Somebody load a Pentax.Off to the shed now to strip
G
Keywords: Charming, polite, and generally agreeable.
Posted 17/09/2009 - 21:52
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Actually it has to run on the battery - do you remember the interval shooting? If it was 'physical', real switch the camera had no chance to kick in at the time to take a picture. (Oh, I realise there potentially could be a mechanical clockwork inside but...)
Kind regards,
Michal R. Hoffmann
K20D, DA 16-45mm, A 50mm F/1:1.4, DA 55-300mm; flash Pentax AF240Z
Michal R. Hoffmann
K20D, DA 16-45mm, A 50mm F/1:1.4, DA 55-300mm; flash Pentax AF240Z
Posted 18/09/2009 - 06:10
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DSLR's will use a small amount of power when the switch is in the off position. The istD has a coin cell for clock back-up. In most cases, manufacturers use "Super caps" these are low voltage very high capcitance capacitors. ICE (in car entertainment) head systems also use them for station memory/settings retention.
No different to your laptops. They are never off, as long as a main battery is present.
Some early point and shoots only relied on the main battery for all retention power and if left for a couple of weeks, will soon flatten the battery. A lot of users put this down to high battery self discharge.
It is not the case.
Since micropower components have evolved faster than cameras, as proved by mobile phone evolution in the last few years, battery drain can be virtually ignored when used alongside Lithium cells.
Main point, if your camera is not used for a month or so, recharge the main battery OR remove it and recharge before use and then reset your preferences.
Regards
No different to your laptops. They are never off, as long as a main battery is present.
Some early point and shoots only relied on the main battery for all retention power and if left for a couple of weeks, will soon flatten the battery. A lot of users put this down to high battery self discharge.
It is not the case.
Since micropower components have evolved faster than cameras, as proved by mobile phone evolution in the last few years, battery drain can be virtually ignored when used alongside Lithium cells.
Main point, if your camera is not used for a month or so, recharge the main battery OR remove it and recharge before use and then reset your preferences.
Regards
Too far from a shore.
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8192 posts
22 years
London
There is a second power switch which is activated when the card is pushed in and subsequently turns off after a period of time.
The "Off" switch is actually a "standby" switch and there is still something running in the camera when it is switched off.
If the last one is the case (and I would guess it is) then people's assumption that batteries loose their charge over time may be slightly off the mark.
G