In order to design an adaptor which "worked right away"
You would need to know the register of Nikon lenses AND the 'in air' register of the EX3 mount.

Now we all know what the Nikon side of the equation is but at the time I was designing my adaptor, the EX3 in air register was a complete mystery to everyone outside of Sony and as far as I know, still has not been made public. (please correct me if I'm wrong, links?)


Until now, none of these pieces of crucial info has been discussed here other than a piece of tube being the "right length" (I must remember that one for my CAD, the right length ±0.01mm)

So lens register minus camera register = "the right length"

Taking measurements from the 1/2" to EX3 adaptor is no use whatsoever as this contains a glass block which increases the length of the light path depending on glass type and its thickness.

Im not accusing anyone of anything, I'm simply asking a question, as any curious and interested engineer would.

So, I'm still puzzled as to how the missing info was arrived at.

How can anyone Know what the "right length" is without knowing the EX3 register?

I have shared some info here.
As one engineer to another, perhaps Steve would like to explain how he calculated the EX3 register.

Please remember, this is to design an adaptor that works first time.

I don't mean to have a go at anyone here, but if it was so easy to build such devices knowing, at most half the data required, why isn't everyone doing it?

On another note, I would like to thank those who have supported me on here, the numerous emails, and all those who have already taken advantage of my new pricing.

I'm thinking of using a new slogan "now you can afford an original"

I had been working on something similar for Nikon lenses but because there was not enough room on my Nikon to 1/3" adaptor, I put it on the back burner.

Will look at it again for the EX3 and let you know.

While you're at it Mike, think "G" centric. Not necessarily to replace what you are already selling, but perhaps in addition to. I already have two Nikons that I can't (respectfully) use on the EX3 because of this annoying elimination of Nikon's manual iris control on their new "G" lenses.

And Steve, I couldn't agree more. I completely hate how still lenses move on their OEM mounts. Got to be a better way. And by the way on your telephoto setup, how are you suspending the EX3? (just looked at the photo)

True indeed. We have been making the adaptors all afternoon and they look great. They will be heading off to be anodised early next week and once back and assembled the first ones will be heading out of the door to our happy customers. If you want one of the first batch message me and I will add you to our expanding list. Being on the list puts you under no obligation to buy one, just means you get first refusal after you get to hear the price.

Cheers
Steve

Eric, I'm at the moment working on the electronic interface for the Canon EF version.
At some point after I will look at something similar for the G lenses.

As usual, you will be one of the first to see my new gear, perhaps this time, even before they are officially launched.

Mike, don't sweat the electronic headaches for the Nikons. I think you can do it mechanically easily enough. Totally different design than Canon's EOS situation. I'll send you a pic.

Of course there's no good reason not to use a clamping system. Use the wrong alloys and/or finishes in that system and things can get stuck. Needing a mallet to get a lens out of a mount kind of reduces the speed advantage.
Lenses and mounts are generally designed as a system, the materials used can be as vital as the dimensions.

I'm not actually using the EX3, just got it to look at and bolted the kit together shoot a few tests. So for this it was just hagning off the back of the lens, but if I were to use one I'd probably get a plate made as I do with the full-size cameras.
Steve

Nonsense, never had a problem in years with PL, Aaton and B4. The good reason to use it is for strength and lack of movement in the mount. Maybe my requirements are more stringent than yours!
Steve

Sorry but I fail to see what we're disagreeing on!

Of course PL mounts are rock solid, I never said otherwise. Of course they're designed for and have strength and lack of movement.

Mike,
I'll be eagerly awaiting your Canon EF adapter if you are able to make one work! You have my contact information. I'll save the money I was going to spend on some Nikkor glass and use it for an EF adapter as I already have lots of Canon EF glass. This is the 'holy grail' for me. And after buying and using your Nikon adapter, I know the quality will be first-rate.
cheers

Derek, of course.

Will add your email address to the list