TheShoe Loc: Lacey, WA

I notice that the tele-extenders MC-14 and MC-20 are listed as supporting a total of 4 lenses. Has anyone tried using them with one of the PRO lenses that is not in that short list, such as the 40-150 f4 PRO or any of the others? The way it is stated in the manual requires that the reader must infer the conclusion, and I am not sure that the manuals in PCLand have reached the consistency of IBM's manuals for the mainframe. And this one is possibly an ambiguous instance.

jcboy3

The teleconverters use a mount that is incompatible with the standard lens mount for MFT lenses. Lenses that can be used with the teleconverters have mounts that are compatible with the teleconverters.

The issue is that the teleconverters have optics that extend into the lens. Most lenses have optics at the very rear of the lens, so it is impossible to use those lenses with the teleconverters. Lenses that are compatible with the teleconverters have optics that are recessed at the lens mount, and do not come into contact with the teleconverter.

The Panasonic 100-400 can be modified to work over the long range of that lens with the teleconverters by modifying the lens mount. The rear optic in that lens will contact the teleconverter at shorter focal length, so care must be taken with this use.

TheShoe Loc: Lacey, WA

Thanks, that explains it. It seems that both companies are deviating from something that ideally should be part of the 4/3 standards, though.

RJW Loc: Oregon

I use an Olympus micro four thirds camera and use M42 extenders and tele-converters 1.4 and 2x with a M42 to M4/3 adapter. It gets quite lengthy when you start stacking them together but it works fine. I also have a 1.4 teleconverter for Pentax mount lenses used with an adapter that works well on an old Quantaray 70-300mm lens. If you don't mind doing manual focus, there are options out there.

mizzee Loc: Boston,Ma

I use the mic-14 with my 40-150 PRO 2.8 with no problem.

TheShoe Loc: Lacey, WA

That is one of the approved combos.

SuperflyTNT Loc: Manassas VA

There’s no deviation. The mount is exactly the same. The difference is the rear element in the compatible lenses is deeper in the mount, allowing room for the teleconverter. They are completely within the M4/3 standard and work perfectly with or without a teleconverter. The same is true for lenses for any mount system.

wdross Loc: Castle Rock, Colorado

There are plus and minus to the 1.4X and 2X teleconverters. The minus is the front element of the two teleconverters stick forward of the lens's mounting plane which limits them to only a few lenses. But the plus is that the Pro lenses they will fit on were designed with the teleconverters design in mind. This is why there is very little image lost with either teleconverter. And on the one non-Pro lens (100-400), they both work well with only the 2X teleconverter softening the image a little at the 400 end in usage.

TheShoe Loc: Lacey, WA

That explains the 4 compatibilities.

Now the question changes, are there any teleconverters that are compatible with other lenses such as the 40-150mm F4 Pro?