Interface for Canon EOS M cameras

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tkoch
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Interface for Canon EOS M cameras

Post by tkoch » Thu Feb 02, 2017 3:51 pm

The new Mirrorless EOS M system cameras do not have a shutter release jack. Could a DSUSB be connected to a modififed canon IR remote, RC-6, with a Jack installed? Then could" DSLR shutter" control the EOS M shutter?

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Re: Interface for Canon EOS M cameras

Post by dpanderson » Thu Feb 02, 2017 6:16 pm

If we are lucky enough that a Nikon ML-L3 wireless remote would work with your Canon camera, then our DSUSB-IR1 would be an existing solution.

If not, it is likely possible that the RC-6 remote could be modified to work. If anyone has information on the infrared pulse train that the RC-6 sends out, I might be able to create a DSUSB-IR2 that duplicates this pulse train.
Doug Anderson
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tkoch
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Re: Interface for Canon EOS M cameras

Post by tkoch » Thu Feb 02, 2017 11:01 pm

From Canon,s web sight, the RC-6 compatibility list: https://shop.usa.canon.com/shop/en/cata ... oller-rc-6

This probably won't help with the pulse train unless one of them is already known.

tkoch
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Re: Interface for Canon EOS M cameras

Post by tkoch » Mon Feb 06, 2017 1:29 pm

I ordered and received a Canon RC-6 remote. I tried it with the camera and it works. There's a switch on the back which toggles instant or 2 second delay of the exposure. The IR is invisible to me but found on the web I could use a web camera to see it. Tried it and it works. I see a light of about 1/4 second duration which may or may not be composed of shorts pulses. The flash looks the same regardless of the switch position so there must be a pulse train. Do you have any ideas to spread the flash out in time to observe the timing of the pulses?

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Re: Interface for Canon EOS M cameras

Post by dpanderson » Mon Feb 06, 2017 6:24 pm

I doubt that a webcam has a fast enough exposure time to separate the individual pulses. It would take an IR receiver and an oscilloscope to do this properly.
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tkoch
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Re: Interface for Canon EOS M cameras

Post by tkoch » Mon Feb 13, 2017 4:43 pm

Ok, I purchased a Canon RC-6 IR remote. I also bought an iPhone app, DSLR.Bot which is said to control, Canon, Nikon, Pentax, Sony and others. the app settings allows configuration to which ever system your using. Your supposed to buy or build an IR emitter pair to plug into the ear bud jack. I first ran a cable out to an amplified speaker, then set up a usb microphone to my Mac. Using Garage band I recorded the output of both the single and the 2 second delayed sounds. On expanding the recording, each signal is composed of two 10ms bursts, the single signal bursts are separated, start to start by 160ms, the 2 second delayed bursts are separated, start to start by 110ms. I built an emitter pair on a stereo plug and tried it on an iPhone 4,5, and a 6. None were able to trigger the camera. In the comments section, it appears the volume of some phones is too low. The RC-6 does work.

I then read about an IR remote replicator on the net. It used the same IR diodes as receivers so I plugged the emitter pair I'd built into the usb mike input, then while recording the input, I flashed the diodes with the Canon RC-6. The signal I recorded had the identical timing as the phone output. However, in the output signal from the phone, I could see the carrier signal, in the RC-6 output signal I couldn't see the carrier, it was also clipped to a positive signal. I believe the carrier was probably at too high of a frequency for the Garage Band to pickup.

Does any of this help you? I also recorded the Nikon output which appears to be a set of five bursts. I'd definitely be interested in an DSUB-2IR.

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Re: Interface for Canon EOS M cameras

Post by dpanderson » Mon Feb 13, 2017 6:41 pm

Google revealed this article:
http://www.doc-diy.net/photo/rc-1_hacked/

It seems like this is consistent with what you observed, with finer detail for the fast signals that are well above audio frequencies. If you are willing to lend me your RC-6, I could capture these waveforms myself using an oscilloscope.
Doug Anderson
Shoestring Astronomy
http://www.ShoestringAstronomy.com

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