 |
 | Home | Contact Us | FAQ | Search & Site Map | Link to Us |
 | Sign In | Join | Other 45 Sites in Network |
| PhotoKB HomeDiscussion Groups Digital Photography Digital PhotoDSLR CamerasZLR CamerasPoint & Shoot CamerasFilm Photography 35 mmLarge FormatMedium formatDarkroomFilm and LabsOther EquipmentPhoto Technique Nature PhotographyPeople PhotographyTechnique GeneralGeneral Photo Topics General TopicsAustralian PhotographyUK PhotographyDirectoryPhoto Clubs |
Photo Forum / Digital Photography / DSLR Cameras / September 2006Looking for battery suggestion on Pentax K100D
Hi all: What is the best battery recommendation for the Pentax K100D DSLR? I've been told to NOT get the RECHARGEABLE CRV3's as that they may cause damage. Feedback, suggestions. Comments on choice of camera? Thanks Bret > Hi all: > [quoted text clipped - 5 lines] > Feedback, suggestions. > Comments on choice of camera? I end up near an Ikea on my day-to-day, and they have AA batteries for an incredibly cheap price. I get a handful of those packets to keep around for when other batteries start to fail. I get the CRV3s because I have an *ist DS, and the DS has trouble figuring out whether AAs are dead or not when they're low, requiring an on-off-on power cycle. Very annoying. This might have changed in the K1x0D line. How and why would rechargeable CRV3s damage a camera? According to Pentax, there is the possibility that when the power drops, it can damage the electronics. >> Hi all: >> [quoted text clipped - 16 lines] > > How and why would rechargeable CRV3s damage a camera? That's incorrect. It's nothing to do with the power level. (Well, except the battery does need to be charged, or course.) Some of the early rechargeable CRV3s are not voltage regulated, and so can deliver a higher voltage than the camera can handle. Apparently later models of the rechargeable CRV3s don't have this problem, but unless you're absolutely certain it's best not to risk frying your camera. I use rechargeable NiMH cells in mine, but it's a lot easier just to use regular CRV3s (or Lithium AAs) if you have a cheap source; they have a shelf life of around ten years, are quite lightweight, and last for large numbers of exposures. According to some of my friends who use them the auto-focus speed of the camera is improved by using Lithium cells. >According to Pentax, there is the possibility that when the power drops, it >can damage the electronics. [quoted text clipped - 19 lines] >> >> How and why would rechargeable CRV3s damage a camera? > That's incorrect. It's nothing to do with the power level. > (Well, except the battery does need to be charged, or course.) [quoted text clipped - 10 lines] > According to some of my friends who use them the auto-focus > speed of the camera is improved by using Lithium cells. The testing I did with my DS did not show any difference in AF, I was hoping that it would be faster. I have five or so sets of NiMh that I keep in sets, they last for around 400 shots, I also have a set of CR-V3's in the bag but have never had to use them. The 2500mh NiMh's are cheap and with a fast charger that does each cell individually I have never had a problem. Like the look of the K100D but am waiting for the K10D to come out before I will buy again. Thanks for all of the info. BTW Do they make lithium Ion AA batteries or just stick with the NiMH >> That's incorrect. It's nothing to do with the power level. >> (Well, except the battery does need to be charged, or course.) [quoted text clipped - 20 lines] > Like the look of the K100D but am waiting for the K10D to come out before > I will buy again. > Do they make lithium Ion AA batteries or just stick with the NiMH No Li-ion that I've heard of. It could be worth considering the new Sanyo "eneloop" batteries, which are still NiMH but have MUCH less self-discharge. The jury is still out on how well they work in practice - you give up some capacity in exchange for that lower self-discharge. A set of NiMH's can in theory give you several hundred shots per charge, but you can be disappointed if you expect that to last you several weeks, because of self-discharge with standard NiMH's. I make it a point to recharge once a week whether I've shot much that week or not, and also charge at the end of any day where I've shot more than, say, 50-100 images. I carry the CRV3's that came with the camera as backup should my rechargeables give out during a day of shoot. I've only had to resort to them maybe 3-4 times in over a year (during which I've shot around 10,000 images), so they should still have hundreds of shots left in them. --------------- Marc Sabatella marc@outsideshore.com Music, art, & educational materials Featuring "A Jazz Improvisation Primer" http://www.outsideshore.com/ >> Do they make lithium Ion AA batteries or just stick with the NiMH > [quoted text clipped - 14 lines] >around 10,000 images), so they should still have hundreds of shots left >in them. That's pretty much my strategy - I'll recharge before a day of shooting unless the batteries are recently charged. I have a *ist-D with the battery grip, and I've yet to exhaust a fully-charged set of 8 2500mAh cells in a single day of shooting, so carrying the original CRV3s as well as an 8 additional NiMH cells is more than I anticipate needing. One thing I have noticed, though, is that the (Energiser) 2500mAh cells don't hold their charge as long as my previous (RayOVac) 1800mAh batteries. With the RayOVacs I could pick up the camera and use it after it had sat around on the shelf for a month. I can't do that with the Energisers. > How and why would rechargeable CRV3s damage a camera? Its a voltage thing. A recently charged Li-on rechargeable CRV3 has a on-load voltage of around 4.2 volts. Some manufactures reduce this with a diode taking the voltage down to around 3.4v. A pair of these would be at 6.8v which I believe is right on the limit for a Pentax DSLR. In use the voltage quickly drops and the dioded rechargeable CRV3s spend most of the time at about 3V but its the initial voltage that can cause the damage. Glyn > > How and why would rechargeable CRV3s damage a camera? > [quoted text clipped - 4 lines] > voltage quickly drops and the dioded rechargeable CRV3s spend most of the > time at about 3V but its the initial voltage that can cause the damage. Thanks for the clarification. |
Reply to this Message |
 Sign In
 Join
 My Latest Posts My Monitored Threads My Blog My Photo Gallery My Profile My Homepage Start New Thread Enable EMail Alerts Rate this Thread
|
©2009 Advenet LLC Privacy Policy - Terms of Use
This website includes both content owned or controlled by Advenet as well as content owned or controlled by third parties.