mervyn_wilmington Posted January 28, 2017 Share Posted January 28, 2017 <p>On ebay uk, there are several sellers offering 'mini digital slave flash auto pre flash sensor' They are obviously sourced from China and are marked W&S.</p> <p>I have asked two of the sellers whether auto pre flash sensor means that the unit ignores the pre flash from the main flash and doesn't go off 'early'. I can't get a sensible reply. One man says he is only in customer care and can't help!</p> <p>Has anyone come across these, please, and are they of any use?</p> Link to comment Share on other sites More sharing options...
rodeo_joe1 Posted January 28, 2017 Share Posted January 28, 2017 A company called "Joom" is also selling them with a slightly fuller description. It sounds like they're meant to ignore a pre-flash. From the apparent size they look as if they'd have a Guide Number in single figures. Might be OK for a hair light or for macro use. For anything else it looks far too weedy. Personally I'd get something that definitely has digital slaving and a reasonable amount of power. Link to comment Share on other sites More sharing options...
mervyn_wilmington Posted January 28, 2017 Author Share Posted January 28, 2017 <p>Thanks for that RJ. They look small, but they are also cheap. They would not need to be powerful for where I need them. We have a huge, ancient beam across our sitting room with a white ceiling. I thought of putting, say three, on the beam pointing upwards and getting indirect flash off the ceiling.</p> <p>I've looked for 'better' ones with the pre-flash sensor, but without discovering anything. Any suggestions, please?</p> <p> </p> Link to comment Share on other sites More sharing options...
mervyn_wilmington Posted January 28, 2017 Author Share Posted January 28, 2017 <p>RJ - I have now spotted another slave one, similar - where it says the auto pre-flash is to avoid red eye. Might not be the same...</p> Link to comment Share on other sites More sharing options...
rodeo_joe1 Posted January 28, 2017 Share Posted January 28, 2017 My feeling is that those little flashes are a bit of a gamble, and if you need 3 of them to get a decent amount of light they're not such a bargain. Whereas with something like a YongNuo YN560 IV you know exactly what you're getting and what it can do. OK, the YongNuo is quite a bit more expensive, but I'm pretty sure that one YN560 would put out more light than 3 of the W&S things. Link to comment Share on other sites More sharing options...
mervyn_wilmington Posted January 28, 2017 Author Share Posted January 28, 2017 <p>RJ - thanks for that. I've no shortage of fairly high power guns now. But I wanted to try a few 'experiments' and need slaves that won't fire when the main unit pre flashes. I didn't think that the YongNuo has that facility?</p> Link to comment Share on other sites More sharing options...
rodeo_joe1 Posted January 29, 2017 Share Posted January 29, 2017 The YN560 series has got more sophisticated with each mark. I recently got a mk III version that definitely has "S1/S2" optical slaving options, as well as a built in radio trigger compatible with YongNuo's RF602 and RF603 triggers. I bought it used for a silly-cheap price, just to see what YongNuo speedlights are like. I must admit I was really impressed with its features and build quality. I'd definitely buy more..... that's if I didn't have too many flashguns already! Link to comment Share on other sites More sharing options...
mervyn_wilmington Posted January 29, 2017 Author Share Posted January 29, 2017 <p>Thanks RJ. That looks very useful. I'll investigate further.</p> Link to comment Share on other sites More sharing options...
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