Talk:Flash synchronization

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Merge proposal[edit]

I've proposed a merge from X-sync, and also suggest from any other flash sync articles if they exist, like M-sync.

Please support or oppose below, with reasons:

  • Support, of course, since it's my idea. These articles are too short, and X-sync is only understandable in relation to the more general concept. Dicklyon 16:23, 12 February 2007 (UTC)
Hearing no objection, I did the merge. Dicklyon 15:36, 21 February 2007 (UTC)

Asking for more clarification[edit]

From the article I still don't know how the synchronization works. What goes first what goes second (the opening of the diafragm or the firing of the flash), what third and what fourt (the closing of the difragm or the finishing of the flash)? Is it good a low sync speed or a hihg sync speed? Why? —Preceding unsigned comment added by Hugozam (talkcontribs) 01:40, 20 July 2009 (UTC)

High-speed sync query[edit]

Is it really true that High speed sync is very rare today?? —Preceding unsigned comment added by (talkcontribs)

I don't understand the question. What do you mean by high speed sync? What does someone say it is rare? Dicklyon 15:36, 21 February 2007 (UTC)

I have no idea and the user is by IP long ago. Some bodies and flashes have "high-speed" modes and today, most dslr's for example, sync at least at 1/125, most typically at 1/250 and some like D40 and D70 mentioned do 1/500. On a related note, there's also nothing about electronic shutters and their effect on flash sync speed nor how the duration of flash pulse relates to very short shutter speeds. (talk) 18:53, 1 August 2008 (UTC)

Image:2007-10-20 Slow flash synchronization.jpg[edit]

Reason for Removal

I feel that that image, doesn't illustrate at all 2nd curtain sync, Sure it may have been taken WITH 2nd curtain sync, but the image does nothing to impart any information on how it works.

You can argue, "But it illustrates what results can be made with 2nd curtain sync" unfortunately, in this case it does not look any different from a 1st curtain sync flash photograph. -- (talk) 19:45, 23 November 2007 (UTC)

D70 has an electronic shutter[edit]

"but some modern cameras may have an X-sync speed as high as 1/500 (e.g. Nikon D70)." The Nikon D70 and the D40 have an electronic shutter in addition to their focal plane shutter, so this is inaccurate.

True, the hybrid shutter of the D70 (and perhaps also the D40, I have never used one so I cannot verify this) makes it possible to synchronize at all shutter speeds if you just trick the camera into believing that there is no flash attached. A piece of non-conductive tape over the two contact closest to the back of the hot-shoe will do the job. Of course, the flash will have to be in manual mode since no communication between the camera house and the flash unit is longer possible. Maxzom (talk) 12:22, 21 February 2010 (UTC)


It says "X sync closes the flash contact just as the shutter blades are almost open (..)"

This sounds like it describes the point in time just before the shutter opens, i.e. even before light is let through the lens. It should read something like "X sync closes the flash contact just as the shutter blades are completely open (..)" --Schorschi (talk) 08:41, 19 August 2009 (UTC)

Inaccuracy regarding leaf shutters[edit]

"Leaf shutters, (...) , can move much faster than focal plane shutters and allow flash sync across all shutter speeds (..)." While it might be true that leaf shutters can move faster, this is not the correct reason. The reason why leaf shutters can sync across all shutter speeds are that there IS one moment during exposure where the shutter is fully open and thus exposes the whole film frame/sensor. As opposed to the focal plane shutter where the curtains at one point start to expose only a (moving) strip of the film frame/sensor. Maxzom (talk) 12:27, 21 February 2010 (UTC)

X-contact and X-sync[edit]

Hello all from russian Wiki! Please, explain to me a few questions.

  1. X-contact and X-sync it is the same thing? X-contact can be found in Nikon F6, Hexar RF and others. In Sigma DP1S and Sigma DP1 says X-sync contact. The most common X-sync. Or there is confusion of terms?
  2. Do I understand that the X-sync is just the method of synchronization, but does not define the connector from the flash? The flash can be connected to the camera via coaxial PC connector, hot shoe or wireless, and can use any method of synchronization (M, F, FP or X sync) for control of the flash, which is available in the camera, right?

Andrew M. Vachin (talk) 07:38, 18 November 2010 (UTC)

It appears that "x contact" can refer to either the hot-shoe connector contact that provides the x-sync signal, or to the switch contacts that close to complete the circuit; either way, the x means it's doing x syncronization. It is not a very common term. X sync is the method, or timing. Dicklyon (talk) 07:00, 19 November 2010 (UTC)