“Does the EMS-UL/UM make focus on the OTA of “*****”?” is still the FAQ (Frequently Asked Questions) even today.
Stop to think of it, more than 33 years has past since I had announced the release of the EMS.
Why don’t they ask the OTA makers if the OTA has the enough back-focus for EMS?
How about telling the dealer or the maker of the OTA, “I would not buy the OTA that does not accept EMS!” ?

「EMS-UL/UMで＊＊＊＊鏡筒でピントが出ますか？」というご質問が、EMS発売から３３年を経ても、全く減りません。
「EMSが使えない鏡筒は買いません！」とディーラーやメーカーに言う人はほぼいないように見える。^^;