Category Archives: Photography

Fixing Yongnuo RF-600TX

A few years ago I bought two Yongnuo RF-602 RX receivers and a Yongnuo RF-600 TX transmitter for my Canon flash units. Recently they started misbehaving. Sometimes the flash didn’t fire, sometimes it fired to late. When using the test button however, the transmitter worked fine. What I noticed was that the green light on the front of the transmitter was flashing more or less continuously (when connected to a camera and the camera was on).

The green light is supposed to light up when the shutter button is half-pressed, and I assume it sends a signal to the receivers to wake up the flash. I also suspect that this behaviour, where the green light is on for no apparent reason, is “jamming” the other signal.

If you have this problem, the easiest way to verify is to block all the pins on the hot shoe except the one in the middle, which is transmitting the trigger signal. I used a thin piece of plastic to test this. This silenced the false signal and allowed the real trigger signal to function.
Image by OzAdr1an on Flickr

The more permanent solution is to open up the RF-600TX and remove the wiring to the offending pin. The unit has 3 wires. One for the trigger signal, in my case the wire in the middle, one wire for the base of the hot shoe, let us call it ground, and a third wire going to one of the other pins. This will vary depending if you have the Canon or the Nikon model.

Figure out which wire goes to the center pin, and which goes to the ground. Cut the third wire. Or take a soldering iron and gently remove it, in case you want to reattach it. That is what I did. To figure out what’s what I used a multimeter.

By the way, this might slow down the sync speed. But in my case it never worked with anything higher then 1/160 anyways…

Update: I just thought about this. To wake up the flash unit(s) you can half-press the test button instead of the shutter button. Or just force the flash units from going into sleep mode.

The image in this blog post is from OzAdr1an on Flickr and has been modified.

Sensor Cleaning Gone Wrong at Dealership

So I decided to give my 5D a proper sensor cleaning before my vacation. I have done this myself before, but since I had run out of sensor swabs, and I wanted it to be a proper cleaning, I gave the job to an authorized Canon dealership. Turns out that was a big mistake.

Now the sensor have more dust on it then it ever had before.

This image is from the second time I picked it up at the dealer. The first job they did wasn’t any good, so I complained and they took another look. I guess I’ll have to ask for a full refund and some sensor swabs so I can take care of this myself now.

I most certainly won’t trust them with my camera again.

Update: They didn’t give me a refund, but they offered to try to clean the sensor again. I declined. Mostly because I need the camera on monday. I did, however, get a few sensor swabs with me. I used two swabs when I got home, and now the camera is ready for action.


Update: The pixelpost site got lost in a disk crash.

I’ve installed Pixelpost as a way to improve my photography. Although it won’t affect my photography directly, it will at least force me to look at my own images on a regular basis. The plan is to publish a new photo every day.

The idea came after reading a blog post from Alexandre Bussie, a French photographer and climber.

Oh, I almost forgot; the link to my Pixelpost-site. It is also placed in the menu of this site.