Fresh Dew on a Rose

by adarsha joisa

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Chances are good that the optical slave you got fired early because your point and shoot camera emitted a "pre-flash"--that is a burst of light from the flash for some purpose other than the main flash burst used to illuminate the scene when taking the image. Pre-flashes can happen for a number of different reasons (wireless commanding, red-eye reduction, ...


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Optical slave flashes are somewhat finicky because most cameras with a builtin flash have one or more pre-flashes, for red-eye reduction as well as to help with focusing and exposure metering (e.g. Canon's E-TTL). A simple optical slave will trigger on those and then be unavailable for the main flash. There are two way to tackle this problem: Turn off the ...


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For the Yashica-Mat, there are little adaptors that attach to the cold-shoe on the side of the camera. They have a hotshoe output and a PC-sync input. This, plus a short PC-sync cable will allow you to attach a regular flash or wireless flash trigger to the Yashica-Mat. You might want a backup PC-sync cable because they are notoriously fidgety and easy to ...


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The Yashica Mats that came up in a quick Google image search appear to have a PC sync port just to the right of the view finder lens. If yours does, then it's as easy as attaching the flash, setting the shutter speed to X (or slower) and firing away. The Polaroid has a flashbar slot, which can be converted to pc sync like this. i wouldn't attempt this ...


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If you only have a single RF-603II, you cannot do this with those flashes. You will need at least two RF-603II triggers, and preferably three. The 430EX does not have any "dumb" optical slave modes, and the Canon "wireless" (near-infrared, wireless eTTL) does not work with Yongnuo's S1 and S2 optical slave modes (for that you need Yongnuo's Sc slave mode, ...


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You will need your flashes set to slave mode (as was mentiond) and make sure you have your 603's all set to the same channel.


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I use the same flash triggers with 3 yn-560II's. I have all of them set to manual with a trigger on the camera hotshoe and one on a flash. I then set the other 2 flashes only slave mode and this enables me to fire all 3 at the same time. Hope this helps you out. All the best, Leon


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I had a similar problem with a SB-600, so I borrowed an SB-700 and found the problem continued with that flash. I set them up to both run on the same channel and found they would fire / not fire at the same times, so I knew it had something to do with the camera. When I turned my built in flash from TTL to "--" everything started working fine. I don't know ...


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While the Yongnuo RF-603 (and -603II, and -605) and YN-560-TX units all come in Canon and Nikon flavors, the difference is solely for the "wake-up" feature (i.e., half-pressing your shutter button will wake up the remote flash if it's sleeping to conserve power). The Nikon and Canon TTL pin layouts are different, so the trigger "foot" used for the on-camera ...


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Really, there is only one reason, and if you were an old enough fogey you would know it from the ads: it hides the shadow behind the subject in the typical "up against the wall and say 'cheese'" picture. One needs to keep in mind that these things arose at a time when a big "potato masher" flash might have a guide number of 45 (ISO 100 in meters, or 150 in ...



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