Transcendent RFV(Real Field of View) has come true on the APM120-90deg Binocular.
By the surprising change of the view point, I have scceeded in taking full advantage
of the rich field of MASUYAMA-32mm-85-deg. with the minimum sacrifice of the listed FOV of 85-deg.
About 3.6-deg of RFV seems to be secured by my visual estimation.
After a lot of twist and turns in my mind, I finally decided it is the best way to attach and remove the Binocular from the horizontal unit.
As the original horizontal drum would not accept the encoder, I had to replace it for my horizontal unit with encoder. I firstly planned to replace the horizontal shaft for a dovetail so that the Binocular can be released from the horizontal unit by the dovetail-holder. But I found it more wise to use the original horizontal drum as a extension pillar. Inserting the shaft into the drum hole is easier than set the dovetail into the holder.
But I found the clamp screw could not perfectly lock the shaft from slipping, and I made a boss and a hole on the top of the drum and the base plate of the arm mount.
One of the passers-by stopped and asked to me “Anything special can be seen TODAY?”.
I replied to him “Everyday is Special, the Sun shows new face everyday.”
But the guy went away hurriedly. The outsider would never understand the meaning and joy of the successive observation.
Here came the emergency case of the EMS-UL by abusing the plus-screws of the housings. The client abused the plus screws on the housings and lost the zero position.