canon 1ds mk2 not working with reversed lens

Just tried a lens reversing adapter and a lens on my 1DsMkII without problem.

Maybe the adapter you are using is touching the electrical contacts in the camera???

This is actual adapter fully fitted and it's not touching electrical contacts .. ;/

Roonal_Z wrote:

Just tried a lens reversing adapter and a lens on my 1DsMkII without problem.

Maybe the adapter you are using is touching the electrical contacts in the camera???

So the obvious question, the camera works fine otherwise? For example you can take a picture with the body cap on - no error code?

creedens wrote:

This is actual adapter fully fitted and it's not touching electrical contacts .. ;/

Hard to tell from the picture, you say it not touching but looks awful close to the group of 3 pins on the right.

Does the camera operate with just the adapter attached but no lens?

If there is any play (movement) between the adapter and the camera then the weight of a lens "might" be enough to cause the adapter to touch the contacts???

With my particular adapter there is about 1mm of clearance between it and the closest pins.

There is a switch inside the camera at about the 10 O'clock position

What I think may be the problem is that your adapter is contacting this switch and moving it to the right and thus the camera is turn "looking" to communicate with a lens but can't therefore an error code.

I was able to replicate Error 01 by simply using the tip of the stylus for my touchpad to move the switch to the right and while holding it there pressing the shutter button - Error 01.

The picture above is of my 1DMkII but same for the 1DsMkII.

I had an issue some years back involving this switch where my chipped Nikon-EOS adapter did not move this switch therefore focus confirmation would not activate.

Someone/poster suggested at the time that this was a move by Canon to prevent 1D photographers from having focus confirmation if using non-canon lenses - said the later 1D's don't have this switch.

Roonal_Z You are a Genius ;] Good investigative work! ... It was this sliding pin causing an error ... After "shaving" a piece of the adapter i was able to make it work! . Thank You very much for your help .. You are a Hero!

Glad it all worked out

Lemming51 wrote:

That switch has been a feature of the EF mount on, as far as I know, all EOS bodies from the beginning.

1D Mark II - same for 1Ds Mark II ___ Photo by Roonal Z

Not seeing this switch or any similar such switch inside the 300D and 400D bodies I have.

Quote from bobatkins.com

"On some EOS bodies there is a small microswitch in the lensmount which must not be tripped by any attached lens or lens adapter in order for the camera body to work. If an adapted manual focus lens trips this microswitch, the camera body them looks for a valid EF series lens to be attached. If it doesn't see the correct electrical connection the the camera body thinks there is an error condition and will not operate. I've never been able to find an official list of which bodies have this switch and which don't. The early 1D series bodies do, up to the 1D MkII. The 1D MkIII doesn't. I think the D30, D60 and 10D have it too (note that's the D30/D60 not the later 30D/60D). Some, possibly all, EOS film bodies have it. I know the EOS-3 does for example.

If you have one of the bodies with this microswitch and your adapted lens causes the camera to freeze you have to remove a small part of one of the bayonet flanges in order to avoid tripping the switch. Either that or do not lock the adapter completely in the EOS mount. If you don't fully rotate it so that it "clicks" into place it won't trip the switch. Of course the adapter is them not fully locked onto the camera, so you need to be careful not to accidentally allow the lens to part company with the camera!"

http://www.bobatkins.com/photography/eosfaq/manual_focus_EOS.html

"Smart" chipped adapters need to have a standard length lug to activate the communication. I think the problem with your chipped Nikon-EOS adapter is just bad execution on the part of the maker.

When the chipped adapter was not working the way I had anticipated (based on others postings) on my 1DMkII I did some additional searching and found that out.

Prior to purchase I had researched what chip I thought was best but didn't realize there could/would be any issues regarding the adapter design.

Located a seller with an adapter that "appeared" be the particular type I would need to move the lever inside the 1DMkII but by that time I wasn't willing to drop another $70USD on something that may (or may not) work.

If at the time I'd intended to use manual lenses often I might have pursed a solution but it was just something to play around with.