shutter cable on stackshot

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Arch86
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shutter cable on stackshot

Post by Arch86 »

hi everyone,
I'm going to buy a stackshot rail from photospecialist.net and am not sure about the cable for my Nikon D800; does this one will work with my camera?
Image
thanks to everyone

Alexrex
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Post by Alexrex »

Yes of course

ChrisR
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Post by ChrisR »

It would seem to be much cheaper to get a "Chinese" remote shutter release and a standard connector from a local shop?
You would need to solder a couple of wires..

mawyatt
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Post by mawyatt »

ChrisR wrote:It would seem to be much cheaper to get a "Chinese" remote shutter release and a standard connector from a local shop?
You would need to solder a couple of wires..
This is what I did, I got a remote switch and wired in the RCA Phono Plug. For the D800 you will need to add a SBD diode. Check with Stackshot Cognisys on this.

ChrisR
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Post by ChrisR »

There should be a diode in the button end?
I thought that was only for the "half press" of the shutter, which SS wouldn't need?


Edit
Here's a partial explanation -
http://www.avernus.com/~gadams/photogra ... konhw.html
He says one diode drop is 1.5V (wrong, it's half that ?) . Others suggest 3 diodes, so obviously there's a range, but as far as I've seen, a Stackshot only needs to short the terminals, to fire the shutter.

mawyatt
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Post by mawyatt »

Chris,

I got a schematic from Cognisys that has a SBD diode in the switch. This was required to emulate the half press function on the D800 I recall. Cognisys sold me the diode (HP) and I got a cheap remote and wired the phono plug and diode into the switch. This was almost 3 years ago, so the D800 firmware updates may have bypassed the need for the diode. I still use the same cable with both the D800 and D800E but have migrated to a different scheme which flips the mirror up and then triggers the shutter from one pulse from StackShot, instead of first pulse raising the mirror and second triggering the shutter. This technique uses the delay trigger in the Nikon D800 which I usually set to 1 or 2 seconds.

Anyway the OP could wire the phono plug into the remote, or get the cable shown and see if it works OK. If not maybe the SBD diode is required.

Hope this helps,

Mike

ChrisR
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Post by ChrisR »

If all else fails, see the instructions, ... :wink: (I meant ME, by the way!)
http://www.cognisys-inc.com/products/st ... switch.php
That's interesting.
Last edited by ChrisR on Tue Apr 14, 2015 10:31 am, edited 1 time in total.

Arch86
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Joined: Mon Apr 13, 2015 2:03 am

Post by Arch86 »

ChrisR wrote:It would seem to be much cheaper to get a "Chinese" remote shutter release and a standard connector from a local shop?
You would need to solder a couple of wires..
the pic I've posted come from the site of the store, it isn't cheap... it's the one produced by cognisys... my question was beacause cognisys produce many sutter cables for nikon

donpirhana
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Stackshot cable with diode schematic

Post by donpirhana »

Sorry to wake up an old thread!

But... can Mike please post the schematic of the Stackshot cable with the diode.

In fact, can anyone out there please post any detailed info on this?

Thanks a bunch.

mawyatt
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Post by mawyatt »

I don't have the old schematic anymore, maybe Cognisys could provide it if you asked.

I don't think the diode is required today. The WeMacro controller apparently doesn't have the diode, with just a NO contact of a relay as the camera Trigger.

The Nikon remote controllers from different sources don't have it as well, at least the ones I have don't.

Best,
Research is like a treasure hunt, you don't know where to look or what you'll find!
~Mike

donpirhana
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Post by donpirhana »

Hello Mike,
Brilliant! Thanks a lot.

Cheers... Don

mawyatt
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Post by mawyatt »

Don,

You are quite welcome sir.

BTW if you want to make the cable yourself it's easy. The Stackshot output triggers the camera on the falling edge of a 3.5 volt source with a ~1K pull up. The D850 (I suspect the D800 and D500 as well) has a 3 volt source with a 3K pull up. So only two wires need connecting for proper operation. Here's some details on the voltages and resistances.

https://www.photomacrography.net/forum/ ... hp?t=36356


Best,
Research is like a treasure hunt, you don't know where to look or what you'll find!
~Mike

Macro_Cosmos
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Re: Stackshot cable with diode schematic

Post by Macro_Cosmos »

donpirhana wrote:Sorry to wake up an old thread!

But... can Mike please post the schematic of the Stackshot cable with the diode.

In fact, can anyone out there please post any detailed info on this?

Thanks a bunch.
You might want to buy the Stackshot 3x instead. It supports 3.5mm shutter cables, which can be found from China for as cheap as a couple dollars. I'm actually not sure if a diode is needed or not, mine is coming in soon and I will test it if I get the time. I might just ask Cognisis about to be 100% sure.

The major difference between the stackshot 3x and the simple version is touch screen and the number of motors being controlled. Stackshot 3x controls up to 3 motors, it might be an overkill. One day you might want to create virtual objects or build a gigapixel capable 3-axis rig, and in that case, the 3x will be useful.

donpirhana
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Joined: Sun Jan 28, 2018 7:09 pm

Post by donpirhana »

Mike, Macro_Cosmos,

Thanks a lot guys. This really helps me out.

Mike, I looked at your posting in the link you provided. Outstanding. I am just getting back into electronics after a very long absence (20+ yrs!). This is good stuff!

Cheers... Don

mawyatt
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Post by mawyatt »

Don,

If you get into EFCS cameras like the Nikon D850, you will find that you can't use the hot shoe flash trigger when in Live View utilizing EFCS. Think Canon and Sony have similar issues. So that thread with the circuit was to enable flash (speed light or strobe) use with EFCS in Live View.

Best,
Research is like a treasure hunt, you don't know where to look or what you'll find!
~Mike

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