Average Reviews:
(More customer reviews)Interfit Infrared Transmitter is just like a weak clip-on flash unit, but has an infrared filter built-in, so that it emits no visible light. The infrared light is good enough to trigger a slave unit (like those from Wein or Morris) attached to the studio flash unit, to remove the sync cable.
The theory sounds good. And this appears to be an inexpensive solution.
Now, the power from this transmitter is rather weak, and most slave trigger units are not very sensitive. That is, if the camera is pointing at the direction of the slave sensor, it can trigger well. But even in a small studio, if the transmitter is not pointing at the location of the slave trigger, most slave receivers may miss the flash often and the result is very erratic. There is a perfect solution for this, and that is to use Wein UltraSlave as the slave receiver. This is not a cheap slave unit, but when I tried it, it was far superior and it was almost essential to make this transmitter work to a usable extent. With UltraSlave I don't need to worry about where this transmitter is aiming. No slave receiver that is cheaper than the UltraSlave (that is, everything else on the market) worked well enough to make this usable. So, if you are considering this product, factor in the price of Wein UltraSlave.
Another shortcoming of the infrared trigger system is that the flash can be fired by a flicker of fluorescent light, lightening, snapshooters, and a commercial photographer shooting upstairs, with his flash light reflected by the window of the building across the street. This system is useful in a private studio but not for location shoot (wedding, event, etc.) where there can be many shapshooters nearby.
I think MicroSync or PocketWizard may give you an interference-free solution.
Another shortcomings of this unit is that it can't fire very rapidly. I'm a fashion photographer and I sometimes shoot 3 to 5 frames per second when I am shooting a tricky pose, especially with inexperienced models. This transmitter can barely make 3 fps. If you need to be able to shoot like a machine gun, this is not for you.
The battery in this unit lasts for perhaps 1000 to 1500 shots. Basically I replace it every day. But the battery well is so tight and removing batteries from this unit is not easy. I need a flathead screwdriver to remove the battery.
Overall, it does the job within limitation outlined above, and if that is usable to you, it's a good product.
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