正立ミラーシステム(EMS)を開発した松本龍郎のサイト。 たった2回の反射で天体望遠鏡の像を正立像にします。
Tatsuro Matsumoto; Inventor of the EMS, Erecting Mirror System. EMS offers non reversed upright image with no additional undesirable abberations.
カテゴリー: BINO Progress Report | 製作状況速報
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The two oculars this client had sent to me in advance seem to be the best match for this binoscopoe, in my opinion.Koenig 32mm offers specially high contrast and the calarity of the field. Though there was some distortion to be seen, it would be no problem in the night sky.
Swarovsky’s Zoom was superb with this binoscope. No distortion could be seen and gives very clear image to the edge of the field through the full range of the magnifications.The barrels of the both should be cut short so that they would not touch the mirror edge.(See the right photo.)
I would often say “Never go panic when you find the original back-focus to be too short for the EMS.”.Here is a good example. Photo 4 (from left) shows that the original back-focus is only 108mm that is far less than “120mm” EMS-US or UM requires with no margin. 130mm or longer back-focus is desirable for the EMS-US(/UM) to use it with a margin of about 10mm.
In this case, minus profiled adapter is the answer, but how would you deal with it?The answer is the male flange of 2″ in diameter that will fit directly into the EMS housing.
Being asked for making low profiled adapters for the Leica Zoom eyepieces, I hit on a universal solution rather than a specialized one.The result is the low-profiled normal 2″ barrel and the low-profiled 2″ sleeve.
The standard housing of the EMS is 59mm in the outer diameter, and 50.8mm in the inner one.So, it seemed to be almost impossible for the standard housing to adapt to the smallest IPD of 51mm, or at least to be required the large trimming of the housing and the repainting afterward.In spite of the negative estimations, I found a good solution to get the minimum IPD of 51mm without trimming the housing at all. The answer is the eccentric 2-inch cap. Of course I should shift the mirror to some extent to the lower side in advance.That’s “Deceptively Easy” isn’t it?
SWAROVSKI ATX95-BINO is completed. But, one of the objective unit is kept by the client (not here) and this photo actually is the composite one of the left and the right unit.You can see how I have treated the annoying bayonet.