Nissin i40 flash accessory

Discussion in 'Accessories' started by jyc860923, Jan 9, 2015.

  1. jyc860923

    jyc860923 Mu-43 Hall of Famer

    Feb 28, 2012
    Shenyang, China
    贾一川
    this may be a stupid question but in short, what does this thing do and why is it an accessory of Nissin i40 flash?

    I see such stuff from time to time but never realised what I can ever need it for, and is it somehow Nissin suggests we carry the flash?:confused:

    16049665459_b6395e2c46_b. IMAG0214 by jyc860923, on Flickr

    and it says to be used "NOT FOR CLIMBING"
     
  2. barry13

    barry13 Super Moderator; Photon Wrangler

    Mar 7, 2014
    Southern California
    Barry
    If it were for climbing, it would be called a carabiner.

    Ones like this are commonly given out as key-chains at trade shows.

    Barry
     
  3. jyc860923

    jyc860923 Mu-43 Hall of Famer

    Feb 28, 2012
    Shenyang, China
    贾一川
    OK, I get it, so it's basically pointless, not secured enough, just a key chain or something...
     
  4. minnnt

    minnnt Mu-43 Regular

    60
    Dec 22, 2014
    It's for the carry case it comes in isn't it?
     
  5. swede

    swede Mu-43 Veteran

    277
    Oct 25, 2014
    Thats what i thought to... i clipped mine to the case so i can fasten the case with flash inside to anything, like a tripod or the camera bag.
     
  6. jyc860923

    jyc860923 Mu-43 Hall of Famer

    Feb 28, 2012
    Shenyang, China
    贾一川
    Yeah, I found that.

    it'll be the first FP/HSS capable flash for me, so I'm not sure about the output in that mode. can I ask how much it can output (1/?) in FP mode? and does it still operate with TTL feature? thanks.
     
  7. swede

    swede Mu-43 Veteran

    277
    Oct 25, 2014
    i have no idea at all, I just use it to bounce inside, in TTL, and just go manual mode on camera.
     
    • Like Like x 1
  8. wjiang

    wjiang Mu-43 Hall of Famer

    TTL FP works fine. It's great for a bit of fill flash outdoors, not sure what you mean by 1/? though? FP flash works totoally differently to normal flash, I'm not sure you can even use guide number to compare anymore.
     
  9. jyc860923

    jyc860923 Mu-43 Hall of Famer

    Feb 28, 2012
    Shenyang, China
    贾一川
    thanks, I see, so it's not 1/16 1/32 kind of thing. I tested the FP mode last night, and TTL works, unlike in normal mode, the shutter speed will have an impact on flash exposure. So there's a lot to consider while using FP mode.
     
  10. eteless

    eteless Mu-43 All-Pro

    Jun 20, 2014
    Yeap, As a rough guide just using FP mode at sync speed is a straight up 1 stop loss, as the shutter speed goes higher the loss gets higher as well... however it's a very weird relationship - you can't really rely on guide numbers anymore.
     
  11. wjiang

    wjiang Mu-43 Hall of Famer

    Yes, if you can get away with shooting below the sync speed, do so. FP means the flash is firing continuously the whole time that the shutter is open (at lower power) so a) shutter speed affects exposure, b) you can't freeze motion purely with flash.
     
    • Like Like x 2
  12. jyc860923

    jyc860923 Mu-43 Hall of Famer

    Feb 28, 2012
    Shenyang, China
    贾一川
    wow a big "thanks", I have to google more, it seems I was wrong that I thought FP flash was good for freezing dog running etc.
     
  13. jyc860923

    jyc860923 Mu-43 Hall of Famer

    Feb 28, 2012
    Shenyang, China
    贾一川
    borrowed from http://webs.lanset.com/rcochran/flash/hss.html

    High Speed Shutter vs. Ordinary Flash Sync

    turnedoff. stationary

    s4000. 1/4000s s2000. 1/2000s s1000. 1/1000s s500. 1/500s

    flash. Ordinary Auto Flash (1/250 shutter speed)

    so the distortion is not caused by using high speed sync, but by the rolling shutter
     
  14. wjiang

    wjiang Mu-43 Hall of Famer

    Also, that's why we use strong NDs on fast lenses with flash, and/or stop down. It's also why a high flash sync speed (or leaf shutter) is so awesome.
     
    • Like Like x 1
  15. fortwodriver

    fortwodriver Mu-43 Top Veteran

    959
    Nov 15, 2013
    Toronto, Ontario, Canada
    Frank
    Yes. Not unlike this:

    https://iconicphotos.wordpress.com/2010/03/06/automobile-delange/

    Focal plane shutters have always had issues with moving objects. Leaf shutters don't have the same problem but Leaf shutters DO have problems with efficiency... At their fastest speeds they can be very inefficient and lose significant amounts of light.
     
    • Like Like x 2
  16. eteless

    eteless Mu-43 All-Pro

    Jun 20, 2014
    Bring back the rotary focal plane shutter, the best of both worlds.

    (I'm talking original PEN half frame, the shutter on them was a work of art... complete with both M and X sync modes... ahhhhhh the sound of perfection :smile:)
     
    • Like Like x 2