Besides stepping up the voltage, most of these battery pack systems
have circuitry that will store a charge in a capacitive manor with
plenty of extra room, so the batteries pre-charge the storage circuit,
which fills your flash unit's capacitor very quickly, and still has
reserve for the next shot (as does your flash's capacitor if you've
only used a portion of it). Saves the time for the batteries in the
pack to charge your flash's capacitor directly.
On Mar 14, 2009, at 10:55 , Bruce Dayton wrote:
Hello Paul,
There is circuitry in the unit to step up the voltage. It does give
much faster recycle time than the AA's of any type.
--
Best regards,
Bruce
Friday, March 13, 2009, 9:31:34 PM, you wrote:
PS> A little deviation...what's the output voltage on the Pentax
battery
PS> pack? Does it give more flashes and a little better recycle time
PS> because the batteries just have more capacity or is there
circuitry to
PS> step up the voltage similar to a HV battery.
PS> -p
PS> 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
Joseph McAllister
pentax...@mac.com
http://gallery.me.com/jomac
http://web.me.com/jomac/show.me/Blog/Blog.html
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