# Why are MMF-1 / MMF-2 adapters so expensive?

Why is it that MMF-1 / MMF-2 adapters (the ones that convert from 4/3 to Micro 4/3) are that expensive?! They seem to be at least $140 on eBay,$250 on Amazon!

Is this a way for Olympus to force you into buying new Micro 4/3 lenses? Or are they technically complicated to build? Isn't is just a metal ring and a bunch of contacts?

Are there cheaper alternatives out there?

• This is not unique to MMF adapters. It seems like the electrical macro rings are as expensive as these. I can't find any good explanation to why it is so, considering the difference between $10 set of passive rings and$140 for electrical ones is, well, the electrical connections. – ysap Jul 3 '11 at 15:02
• @ysap - I see. Why do you write a comment instead of an answer? :) – ibz Jul 3 '11 at 17:10
• Well, maybe b/c it does not really answer the question why? – ysap Jul 3 '11 at 17:27