Radio coupled flash for a Pentax K100 ?

Discussion in 'Pentax' started by Peter, Jan 18, 2009.

  1. Peter

    Peter Guest

    My son has this camera and uses it for sports photography - mountain
    biking mostly.

    He needs a remote flash unit. One can get slave flashes but these need
    the camera's flash to be used, which one doesn't always want to do.

    Ebay is packed with radio flash transmitters/receivers, around £15.

    Pentax also sell some amazingly pricey radio flash units, above £300.

    Can anyone recommend a radio flash link and perhaps a suitable flash

    Thank you in advance.
    Peter, Jan 18, 2009
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  2. Peter

    Peter Guest

    To add to my original Q:

    I see countless *slave* flashes on Ebay, around the £30-£70 mark, but
    these obviously need the camera's flash to be active. Sometimes one
    may not want to do that, which is why I am after a radio-connected
    flash. Also, it isn't clear if any of these have a means of being
    connected to the receiver of a radio flash link.

    On the radio links, Ebay sells a huge # of radio
    transmitters/receivers, not camera brand specific, which come with a
    collection of adaptor cables, including what looks like a 1/4" jack.
    I've never seen any flash unit with a 1/4" jack socket! Most of these
    have a hotshoe plug, which is good since the k100 doesn't have any
    connector with the flash trigger coming out on it, so the hotshoe is
    the only way.

    My experience of flash goes back to the goode olde 1970s/80s with the
    big Vivitar units which clipped onto the hotshoe, and later with the
    compact OM2 flash which worked intelligently with the camera.

    What I cannot work out is what total kit I should buy. The slave
    flashes e.g.|66:2|65:12|39:1|240:1318

    doesn't say it will work with a radio link like this|66:2|65:12|39:1|240:1318

    Camera shops I've been to don't seem to know anything about this, but
    would be happy to sell me a £300+ Pentax flash.

    I think my K200 has the radio transmitter built-in so the Pentax flash
    should just work (remotely located) but my son has the K100 so needs a
    radio transmitter...
    Peter, Jan 18, 2009
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  3. Peter

    Woody Guest

    Older flash units - like those for OM2 etc - wil NOT work with modern
    dSLRs. The camera usually needs one of the extra contacts to sense that
    the flash is present and ready to go (in fact will not trigger the flash
    'output' without it) and also works at around 6V as against anything up
    to 200V or more on the older flashes.

    Wien used to do an old-to-new adapter hot shoe but I've heard reports
    that they were not too reliable, and they were relatively expensive.

    The simplest solution may be to buy a cheap flash that will work with
    the camera but that has a swivel head. It can then be turned away from
    the scene but will be enough to trigger a slave. You may need to do this
    anyway as many dSLR flashes actually trigger twice very quickly, once at
    lower level for exposure and once for the picture. Then use a light
    slave on the main flash - which if you use one of the old-type slaves,
    can be an old-type (hammer-head?) gun.

    On the couple of occassions that I have needed to use my old Sunpak 3600
    hammer-head, I have used a Lumiquest soft screen that I have (a good buy
    anyway.) This fits over the camera flash and diffuses the light - very
    good for parties etc. If the camera is then set for manual exposure for
    the big gun the light from the camera flash will be relatively small
    compared to the main illumination so may not affect the final result,
    but it is enough for the camera to work properly.
    Woody, Jan 18, 2009
  4. Peter

    Peter Guest

    Any offers on this?

    There are plenty of slave flashes around the £50-100 mark but I cannot
    find out if any of these have a socket for the radio receiver.
    Peter, Jan 20, 2009
  5. Take a look here, all your questions and more will be answered.
    However, I would be a little careful of cheap radio triggers as there are a
    lot of complaints about them.

    Roger Blackwell, Jan 21, 2009
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