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Fujinon binocular 40x150 (1 Viewer)
- Thread starter Wigs
- Start date
mooreorless
Well-known member
Hi Wigs, Welcome to Birdforum! You might be better off to post this on Cloudy Nights.
http://www.cloudynights.com/ubbthre...7369/page/0/view/collapsed/sb/5/o/all/fpart/1
http://www.cloudynights.com/ubbthre...7369/page/0/view/collapsed/sb/5/o/all/fpart/1
Surveyor
The more I understand, the more I understand why I
Hi Wigs,
Boy, I would love to have a pair like that. Never seen any like them before.
A couple of questions. Do the eyepieces turn freely? What are the markings on them? It may be that you are trying to focus too close. IF the markings are +/- 10 diopter, you may get a close focus of 150 or so meters, +/- 20d, about 80 meters. The eyepieces may not be marked and turn several revolutions to get to a closer focus.
A picture may be helpful for those who are familiar with these.
Boy, I would love to have a pair like that. Never seen any like them before.
A couple of questions. Do the eyepieces turn freely? What are the markings on them? It may be that you are trying to focus too close. IF the markings are +/- 10 diopter, you may get a close focus of 150 or so meters, +/- 20d, about 80 meters. The eyepieces may not be marked and turn several revolutions to get to a closer focus.
A picture may be helpful for those who are familiar with these.
Ingle1970
Well-known member
Thanks guys!
Mooreorless - I checked out that other site and got some feedback - thanks.
Here are some more details:
OK.... It looks like each eye piece focuses individually. However, when I try to adjust them, the numbers move but it doesn't actually change anything - they eyepieces don't move in or out.??? It spins round but doesn't seem to do the job!!!??? I will try and get some pics for you within the next few days.
Mooreorless - I checked out that other site and got some feedback - thanks.
Here are some more details:
OK.... It looks like each eye piece focuses individually. However, when I try to adjust them, the numbers move but it doesn't actually change anything - they eyepieces don't move in or out.??? It spins round but doesn't seem to do the job!!!??? I will try and get some pics for you within the next few days.
henry link
Well-known member
If the numbers are "spinning" and the eyepieces are not moving it sounds like the part with the numbers, which forms a kind of cowling over the eyepiece cylinder, has become detached from the eyepiece itself, maybe from someone trying to force the focus of an old frozen eyepiece. Usually the cowling has a toothed ring that locks over a pin on the eyepiece top. That allows the numbers to be aligned so that "0" is at infinity focus, then a collar is screwed down tight to hold the cowling in place. There could also be tiny set screws on the side of the cowling (usually 3) to accomplish the same thing. Sometimes those are covered with putty. The set screws may have been loosened or if the focus is forced the set screws may dig a groove into the eyepiece cylinder allowing the cowling to spin. Look for the set screws and try removing the eyecup and see what's under it. Photos are always helpful.
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Jason Bugay Reyes
Well-known member
Nice looking binocular !
henry link
Well-known member
Looks like the eyecups are already missing. I can't tell from the photos how the eyepieces fit together, but here's a photo of one possibility. This is the eyepiece from a Fujinon 8x30 with the eyecup removed. The collar on top is slotted for a spanner wrench and glued in place with lacquer or something similar. A metal straight edge like the dull side of a knife placed across the slots might remove it if the lacquer bond could be broken or dissolved (with acetone?). Your eyepiece collar could have two tiny holes for a pencil type spanner or there may be set screws somewhere on the side of the housing (possibly in the slot at the back of the eyepiece).
If you can figure out how to remove the outer cowling with the numbers, then you can tell if the inner eyepiece cylinder that actually does the focusing is frozen from dried out lubricant or some other cause. If it can be turned you should at least be able to establish an infinity focus point for your eyes, even if you can't figure out how to lock down the outer sleeve to prevent it from spinning.
If you can figure out how to remove the outer cowling with the numbers, then you can tell if the inner eyepiece cylinder that actually does the focusing is frozen from dried out lubricant or some other cause. If it can be turned you should at least be able to establish an infinity focus point for your eyes, even if you can't figure out how to lock down the outer sleeve to prevent it from spinning.
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edwincjones
Well-known member
henry link
Well-known member
Wigs,
I noticed Gordon Raynor's post at Cloudy Nights about the eyepieces on the 25x150 focusing without rotating. He's very knowledgeable about the big Fuji's. I imagine his description also fits your binocular.
Henry
I noticed Gordon Raynor's post at Cloudy Nights about the eyepieces on the 25x150 focusing without rotating. He's very knowledgeable about the big Fuji's. I imagine his description also fits your binocular.
Henry
