WSP2018 with 140APO-BINO by Mr.Yuri Petrunin

Dear Tatsuro,
The WSP at Chiefland (instead of usual, but destroyed by hurricane Key West place) was quite short by timing due to weather conditions.
In 3 night we had only two to observe and in those two – only before 10PM (so, total appr. 5 hours of whole trip), after that, the fog was coming and staying until next morning.
And this fog did not give us any planets )-:
But it was enough for testing the 140Bino, it works great on deep sky and on it it was appr. equal to APO200ED that was near by, but the 140 bino had wider field.
Adjusting optical axis for me was not difficult and flawless, but not as easy for other people, since it takes time to set up for each personl, but when set up was done the impression was like” “wau, now I see what these binoculars about!”.
Regards, Yuri
Attached please find a few pics:
I am using Mitutoyo 100mm block for checking the bino after long trip on the road (~3000km), same block is used as a “gage” for setup of my IPD.
Best regards, Yuri

Comment by Matsumoto / 管理者のコメント

Mr.Yuri Petrunin sent me the hot report of WSP2018 with the TEC140-BINO on TTS-160.
I would like to extend my biggest applaud on his feat of his new binoscope.  Thank you very much for the follow-up report with the fabulous photos, and I will be looking forward to seeing your following reports.


Flexible Mirror System, FMS, for up to 3-inch Eyepieces / 3インチ以下用FMS

FMS for up to 3-inch eyepieces is just completed.
There should be a compromise between the image circle and the total light path. On the condition of the total light path of 202mm, the maximum image circle is achieved with two 63mm-elliptical mirrors. Please do not expect to the level of the single reflection diagonal mirror in the image circle, such as EMS-UL that I do not recommend to use far beyond 32mmX85-deg.
I recommend to use 60mm or under of the 3-inch eyepiece on this FMS at the conservative estimation.
The actual image circle will be varied by the F-ratio of the telescope. The smaller F-number shows the larger image circle on the same Mirror System.
Here is the user’s report of FMS-2-inch.

2回反射のシステムで全ての3インチアイピースに対応するためには、非現実的なバックフォーカスが必要になるため、今回は、大方の高級な大口径屈折(20cm 前後以上)のバックフォーカスで合焦する条件として、光路長202mmで収まるサイズのミラー(短径63mmの斜鏡)でフリーアングルのEMS、すなわちFMS(Flexible Mirror System)を製作してみました。


Slit clamp of the bearing ring of the Center Mount / 垂直回転軸受けのスリットクランプ

This is the most reliable clamp, but very few of the mount on the market uses the mechanism because of the difficulty in making.
This mechanism will promise the user of the optimum friction and the most rigid clamp altogether.


Mechanism of the vertical unit (Center Mount) / 垂直回転ユニットの構造(中軸架台)

Here is the mechanism of the vertical unit.
The bearing ring is waiting the processing of the slit clamp.


New Friend / 新しい友達

I had a first drink last night with my new friend, Mr.Hirofumi Fukumoto,a junior-high teacher; at some pub in Yayoi-Cho in Tottori.
He is also so much ivoleved in crafting things and appreciates my work of binoscopes.
He had shown my TV program to his students and he brought the impression letters by them. Obviously I was so much moved by that.
This is his present of his own making, a fabulous wooden cutouts. What a craftsmanship!!


48mm-filter solution / 2インチスリーブに48mmフィルター

This is how to set 48mm-filter on 2″ sleeve.

2インチスリーブ内径≒50.8mm、48mmフィルターはそのままでは取り付きませんね。 こうすれば ↑ 取り付きます。
(3インチスリーブ用の3-inch →50.8mm AD)

Vallentine’s Cookie from my daughter / 娘からのバレンタイン・クッキー

Hand made cookies arrived from my daughter, Neurologist, as a Vallentine’s Day present.

The latter photo is the screw case she made for my birthday persent 21-years ago. It was made of a caramel case by herself and I could not dispose for 21-years.


I am proud of my daugher who has gone through many hardships into where she is.
I can say that she has gone ahead of me already.

I would like to share her writing in junior high with you.

My Challenge

When I tried something, I seldom saw it through to the end. I asked myself, “What would be the best way to change myself? What can I do to challenge myself?”
I chose judo for its intensity and its discipline, and joined the judo club with my best friend Kayo.
“Namiko joined the judo club!” “Unbelievable!” Everyone was surprised at my decision.

In my first year the judo club had seven members with Kayo and me being the only girls. I enjoyed judo until the third graders retired. With the third graders gone, other team members lost interest and their attendance was sporadic. Eventually they quit coming one by one. Kayo and I were the only ones who still went to practice.

The second year arrived and the judo club reached a wall. I anticipated new members but the school year didn’t bring a single one. Kayo and I found ourselves totally alone during practice. How were we going to improve?
Then something happened. Anri, one of my classmates, joined the club. Anri became very active at judo and provided a breath of fresh air.

The third school year began with a ray of hope: three freshmen members. They brought energy to our club, but at the same time, I was feeling responsibility as a captain.
In May, we had a grade promotion test. I had two matches. In one I had a draw and I lost the other by ippon. The judge later said to me, “You don’t have your judo yet!” I could do nothing but admit those words. It was clear that my judo was nothing but awful. I felt as if I were thrown to the starting point. What have I done these two years?

The last match is over, but in the end, I could not show any winning record. What a disappointment! I wanted to compete in more matches, and I wanted to win more. I thought, perhaps I made the wrong decision. I thought as if it had been wrong to choose the judo club. “What in the world have I done with judo? ”
When I was so depressed, Kayo said to me. “I also can’t say I don’t have any regret, but there is no use crying for the past.”
“That’s right.” There must be at least something I got from judo.
Suddenly, a flashback, the faces of my friends who have always been together at practice.
I once injured my back during practice just the day before the match. I was depressed because I couldn’t take part in the match and had to stay in bed. After the match, Kayo and Anri kindly visited me with a present and encouraged me by telling about the match. How happy I am with such nice friends!
Yes, it’s judo that brought us all together. My friends and experiences with judo will remain with me for the rest of my life.
In the end, did I change myself? I will know the answer at my next challenge in the future.

幼くして苦笑するほどのストイックさで、もし父の影響があったとしたら、むしろ謝らないといけないけど、そのストイックさて道を切り開いて来たことも事実。 ただこの先は、幸せな人生を歩んで欲しいと願うばかり。^^;