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Sync Speed: 1/60 vs 1/25
Old 11-18-2005, 01:05 PM   #1 (permalink)
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Last night I got my first light in, along with all the necessary equipment to hook it up to my camera. I ran a roll through my camera just to test and everything worked great. I found my 10 ft sync cord to be quite limiting in movement though and I have decided that needs to be my first "upgrade".

But, on a lark, I decided to see if my trusty Pentax could fire my strobe using its built in wireless mode. I popped my flash up, turned on the wireless feature and squeezed off a frame. Much to my surprise it actually triggered my strobe! The only issue is that I could only get it to trigger it at 1/60th of a second and not 1/125th.

So this brings up a question I have. Obviously it would be awesome to run this thing wirelessly all the time, but, what are the real drawbacks to using a 1/60th sync speed? More ambient light coming in? Possible blur from movement? So how real are these drawbacks? Are there any others I'm not thinking of?
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Re: Sync Speed: 1/60 vs 1/25
Old 11-18-2005, 01:16 PM   #2 (permalink)
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The flash freezes the action. Typically with flash you'll be shooting at 5.6, 8, 11 etc which means at 1/60th you'd have to have something extremely bright to have any affect of the photo. If you had all the room lights on in a house and shot with flash at 1/60th, the room lights would have no effect at all at fstops like f8, for example. By the way, 1/60th was the standard sync speed for most cameras when I started photography and there was never any problem. I still shoot at 1/60th usually out of force of habit.

Of course, its not totally clear what you are saying. Did you pop up a flash on the camera itself and fire that to cause another strobe to fire or are you saying that there is something wireless in the camera that fired the strobe? If you did have an on camera flash that fired the strobe, then it also will contribute light to the subject (and in that case, you'd usually point it at the ceiling or deflect it with tinfoil, etc.

Cheers,
rfs
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Re: Sync Speed: 1/60 vs 1/25
Old 11-18-2005, 01:33 PM   #3 (permalink)
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Yes the pop up flash triggers the strobe to fire, but there is a wireless mode that I have to turn on for it to do it. The flash itself doesn't normally trigger. Although I had wondered if the pop up flash would affect the exposure itself, because it does appear to fire. Seems like I heard of someone using a piece of E6 film to only allow the infrared range to pass through. I may play with this.
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Re: Sync Speed: 1/60 vs 1/25
Old 11-18-2005, 04:57 PM   #4 (permalink)
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1/60th has been the flash sinc standard for AGES.....its always worked for me
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Re: Sync Speed: 1/60 vs 1/25
Old 11-18-2005, 05:35 PM   #5 (permalink)
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Dude... how old is that Pentax?!?!! Not to worry though.. other posters are correct that the flash does the stopping to the tune of around 1/14000 of a second. The faster sync speeds are most useful when blending fill flash with daylight and wanting a shallow depth of field... that's when you need the 1/250 to 1/500 range. Using slower film will also help....

-Craig
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Re: Sync Speed: 1/60 vs 1/25
Old 11-18-2005, 05:42 PM   #6 (permalink)
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The flash acts as your shutter speed so you are going to be ok in normal studio situations with a sync of 1/60th.

If you need to pick up ambient light such as bright candles, household lamps, etc, this sync speed of 1/60th and even 1/30 comes in very handy.

I have been known to use 1/15th of a second on a tripod to pick up household lamps as a hair light and rim.

I strongly suggest not to use your on camera flash to trigger your strobes unless it is a back up. It's foolish to have quality light scarred by such a thing. Please look into a longer sync chord or Pocket Wizards for mobility.

J T



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Re: Sync Speed: 1/60 vs 1/25
Old 11-18-2005, 06:02 PM   #7 (permalink)
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Well upon reading through the manual there is a custom function available that will disable the flash from adding to the exposure. I'm going to play with it when I get home.
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Re: Sync Speed: 1/60 vs 1/25
Old 11-18-2005, 06:28 PM   #8 (permalink)
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That's cool but you are always going to have to set your strobe sensor so the on camera flash sees it. It can be troublesome. Like I said, it can be used as a back up but you might find it to be a pain in your ass eventually.

My point is to try and not be cumbersome. You want freedom but you are chimping your way through it and trying to get by. I am all for getting by with minimal equiptment and less money too. Just making you aware of a potential other problem.

J T

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