Do any of your extension tubes mate with the Oly teleconverters?

WileEC_ID wrote:

Peter 1745 wrote:

WileEC_ID wrote:

I confirmed all of the above and compared the extension tube I have next to the O 40-150mm f/2.8 and without compromising the design of the tube, I won't be able to create that cutout. See image below:

The Oly 40-150mm f/2.8 Pro has a decided cutout for the tab on the MC-14 and MC-20

So - it will be a different brand to make this work. Sigh - at least we are clearly documenting what is critical to making this work. Narrow enough area in the central part of the extension tubes AND room for the special tab on the teleconverters to go. It looks like this lens also has two contact points. Examining the two teleconverters - each has a single contact point, but one is further from the tab than the other. I'm guessing that which contact point is touched tells the lens and camera which TC is attached. I see no corresponding contacts on the two extension tube sets I have. Am curious if any of the other sets have these? Or perhaps I am completely wrong about the purpose for this single contact element.

The Olympus teleconverters are only official compatible with the M.Zuiko Digital ED 40‑150mm F2.8 PRO and M.Zuiko Digital ED 300mm F4 PRO.

I don't own either of these lenses and none of the lenses I have feature the 2 extra contact points. In fact I wasn't even aware of their existence until you pointed them out.

Your surmise that the contacts tell the lens if a MC14 or MC20 is attached seems reasonable to me.

I am not aware of any extension rings that feature pass through electronics for them. I would be very surprised if they will ever appear as the use of teleconverters combined with extension rings is a very niche activity, and most of those who do combine them use the Oly 60mm macro lens (which doesn't have the extra contacts anyway).

I own both of the lenses the TC are officially sanctioned for, and the 300mm looks exactly like the 40-150mm in the picture.

Wouldn't have expected Oy to assume people would even try to use the TCs with a macro lens - but one should never underestimate the genius of people that have a will to make something work. When I shot some macro stuff with my FF setup a few months back, I discovered the ability to use a TC with that macro lens and while the minimum aperture for the lens was 1/32, with what I had connected - I was getting 1/64 and saw 1/81 once. Most would run to cry DIFFRACTION - but I didn't see it and unfortunately sometimes people limit themselves by stat and spec sheets rather than just try stuff - I mean honestly - the worst thing that can happen is you get a bad click - but you get the chance to learn something - why turn that down.

Curiosity and human ingenuity are a very powerful combination.

Diffraction is real but less important to an image than lighting and composition, and often given way too much attention than it deserves.