Paul, there may be a circuit, but specific batteries react differently
to specific charges. Knowing the charge pattern of the device you're
about to power gets you the chance to fine tuning the batt pack to great
achievements.
That's also why the real world test of a specific batt with some
particular camera plus the actual charger is much needed, and the
ultimate word about how that items work together.
LF
...and I spent two months trying to get the best result of a battery
powered pc, sorting three types of mini-itx boards, five different power
supplies and I want to forget how many solid state hard drives, pen
drives, web cams and yes, batteries...
Paul Sorenson escreveu:
A little deviation...what's the output voltage on the Pentax battery
pack? Does it give more flashes and a little better recycle time
because the batteries just have more capacity or is there circuitry to
step up the voltage similar to a HV battery.
-p
Paul Stenquist wrote:
Godfrey is correct. I use two 540 flashes, three sets of rechargeable
NIMH batteries, all freshly charged, and the Pentax power pack that
takes 6 C alkaline batteries. I also bring a second set of Cs for the
power pack. However, I don't use Eneloops. I believe my batteries are
Everready 2300s. Eneloops hold a charge longer but yield fewer flashes
in continuous use.
Paul
On Mar 13, 2009, at 2:16 AM, Godfrey DiGiorgi wrote:
You've been drinking or smoking, John. ;-)
Eneloop NiMh rechargeables for flash units make the most sense if
you're going to use them often. Maintenance ... deal with it. ;-)
I don't use flash all that often so I use Lithium disposables.
If you're really serious about doing weddings on a regular basis, get
a high-capacity power pack for your AF540FGZ. I wouldn't even
consider taking wedding jobs without two of them and a backup flash
unit, at the very least.
Godfrey
On Mar 12, 2009, at 11:08 PM, John Celio wrote:
Anyone available to answer an alliteratively quaint and quick question?
Well, I was wondering what's the best battery to buy for
frequent-flash photography. The bullshit batteries I bought for
last weekend's white wedding were obviously obsolete for that
oddysey of outbusts.
Alkalines are available all around, yet vary in their veracity and
voltage volume. Lithiums last a lot longer, but buying them by the
bag begets broke-ness. Rechargeables require regular monotonous
mainenance and more money at the moment of purchase, but procurement
provides a pre-existing power population in your pocket that
pooh-poohs spurious substitution by shoddy successors.
Recycle rates, really, are the reason I ask about all this. My
Pentax AF540FGZ needs a new and nubile change in the
charge-chamber. Previous performance pooped out posthaste, posing a
problem.
Suggestions?
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