Hello there. I recently purchased a Fujinon 7.3mm-102mm f1.9 TV lens and am certain it is in B4 mount. I got it for a steal! $8. However, all B4->m4/3 adaptors seem to be in the rang of $120-$300. So, I was wondering if any of you had less expensive alternatives to these rather pricey adaptors. Thanks for your consideration!