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FORUMS General Gear Talk Flash and Studio Lighting 
Thread started 16 Nov 2011 (Wednesday) 11:14
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Pocketwizard Rear Curtain Sync

Senior Member
428 posts
Likes: 2
Joined May 2009
Location: Calgary, AB
Nov 16, 2011 11:14 |  #1

Im new to the world of Pocketwizared's in the past I have used the Cactus v5's and loved them but now with the MiniTT1 and FlexTT5 there are so many new options! But also a few questions I cant seem to find the answer for. (for all my testing Im using 430exII)

I have read that at speeds below 1/100th rear curtan sync is enabled in the pw (confirmed in the configuration app) for testing i have set a 1sec ss however instead of rear curtan sync it is firing for both front and rear, is this an expected behaviour?
I have looked at the description on the pocketwizard site (external link) and if I tried that it would have two golf balls.

also with the hypersync (I hope im using the correct pw term) as I increase the shutter speed (50D) I get a perfect sync up to 1/3000~ then beyond that I do get a small soft black bar near the bottom of the image. dont get me wrong 1/3000 is amazing and I will probably never need flash beyond that and even if I did the bar is so small a very small crop would remove it, but I have read that there are setting I can change that may remove that... just cant seem to figure it out.

So far loving all the advantages of the pw system. even if I cant figure out these two minor issues it was money well spent.

Gear List

Cream of the Crop
5,646 posts
Gallery: 26 photos
Likes: 460
Joined Mar 2008
Location: London, Ontario
Nov 16, 2011 16:38 |  #2

the flash at the start isn't going to impact your shot - that's the ETTL pre-flash that determines what it needs to fire off for what it thinks is a proper exposure... and then you get your rear flash...

EOS R / 7D2 / 1D IV (and the wife has a T4i)
Sig35A, Sig50A, Sig85A, Sig14-24A, Sig24-105A, Sig70-200S, Sig150-600C
100-400L, 100L, 300 2.8L, 1.4x II / 2x II
600EX-II X3, 430EX-III X3

1,825 posts
Joined Oct 2010
Location: Charlottesville, VA
Nov 16, 2011 17:53 |  #3

Flash timing can be tweaked in the PocketWizard Utility. Hook the PWs to your computer with a USB cable and have at it.

At 1/3000 you are in 'optimized HSS' rather than true sync. PW refers to both as Hypersync but that's a bit misleading. Look on the flash control panel; when it shows HSS you're in HSS. You can adjust the point at which HSS kicks in with... yup... the PW Utility.

T2i . 18-55 IS . 70-300 IS USM . 70-200 2.8L IS . 28mm 1.8 . 100 Macro . 430EX II . TT1/TT5 . Bogen/Manfrotto 3021 w/3265 ball-mount

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Pocketwizard Rear Curtain Sync
FORUMS General Gear Talk Flash and Studio Lighting 
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