DX-1G and YS110 missfire?

I'm using Dx1G with Z240 and my friend has the 1G works with D-2000. So far, no problem. Remember, Dx 1G has no TTL function and please use auto or manual mode.

I am fairly confident the dx-1g does use ttl metering. Set your Z40 to s-ttl, the camera to manual, to f-stop to 4.1, shutter to 1/80, iso to 100 and take a picture of your computer screen. The strobe should not have performed a full dump. Now place you hand over the lens, take another picture and the strobe will perform full dumb. Given this behavior it must have ttl.

The f-stop needs to be set 3.2 or large else the strobe cannot squelch fast enough and pictures are over exposed.

I am fairly confident the dx-1g does use ttl metering. Set your Z40 to s-ttl, the camera to manual, to f-stop to 4.1, shutter to 1/80, iso to 100 and take a picture of your computer screen. The strobe should not have performed a full dump. Now place you hand over the lens, take another picture and the strobe will perform full dumb. Given this behavior it must have ttl.

 

The f-stop needs to be set 3.2 or large else the strobe cannot squelch fast enough and pictures are over exposed.

This doesn't necessary mean it has TTL. When you cover the len, the CCD sense nothing during the preflash and the flash will fire at full power. With a f-stop 4.1, shutter 1/80 iso 100 and taking a picture of your computer monitor, it is expected the flash won't fire at full power. You can try to take picture of your screen again with different f-stop and shutter speed and you see if the TTL really works or not.

It would be interesting if someone could confirm this, but it seems like this for the scenario of a slave strobe that is triggered via fibre optics:

* The so called "TTL" function of YS110 (and maybe other flashes), means that the strobe will sense the duration of the cameras main flash, and thus turn on and off the strobe accordingly.

* A compact camera will use a pre-flash, that is used to determine the strength of the man flash and exposure that will be take directly afterwards.

* The YS110 supports this exposure measurement by firing a pre-flash in synch with the camera

Is this right? The result should theoretically be quite good, as nothing much should change between pre-flash and main flash. However, I don't see how the YS110 could know what is 100% time from specific compact camera and adjust accordingly. Properly made, you should enter minimum and maximum flash time into the YS110 so it could time accordingly. As it is designed they maust have made some kind of assumption on all cameras.

It would be interesting if someone could confirm this, but it seems like this for the scenario of a slave strobe that is triggered via fibre optics:

 

* The so called "TTL" function of YS110 (and maybe other flashes), means that the strobe will sense the duration of the cameras main flash, and thus turn on and off the strobe accordingly.

 

* A compact camera will use a pre-flash, that is used to determine the strength of the man flash and exposure that will be take directly afterwards.

 

* The YS110 supports this exposure measurement by firing a pre-flash in synch with the camera

 

 

Is this right? The result should theoretically be quite good, as nothing much should change between pre-flash and main flash. However, I don't see how the YS110 could know what is 100% time from specific compact camera and adjust accordingly. Properly made, you should enter minimum and maximum flash time into the YS110 so it could time accordingly. As it is designed they maust have made some kind of assumption on all cameras.

Most of the DC use a preflash to light the object of interest and the sensor of the DC then calculate the output for the subsequent flash. This is not true TTL (through the len) function. A camera with TTL doesn't necessarily need a preflash (e.g. most DSLR) and the sensor actually monitor the amount of light reaching the object of interest and quench the flash once the exposure is adequate (the output is not predetermined).

A digital strobe which act as a slave copies everything from the main flash of the DC including preflash. If the camera has TTL function. a strobe with optical TTL can copy exactly the output from the main flash.