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FocuScope question

 
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grat



Joined: 17 Feb 2021
Posts: 9
Location: Gainesville, FL

PostPosted: Mon Feb 22, 2021 2:32 am    Post subject: FocuScope question Reply with quote

The unit that came with my speed graphic is fairly hazy-- Does anyone know the secret of disassembling the scope without breaking it?

The best guess I've been able to make is that the lens at the threaded end is glued into place.

Edit: I realized I was unspecific-- It's the collapsible tube version.
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45PSS



Joined: 28 Sep 2001
Posts: 3948
Location: Mid Peninsula, Ca.

PostPosted: Mon Feb 22, 2021 8:31 pm    Post subject: Reply with quote

It should screw into the rangefinder eyepiece. That's not to say that someone bonded it to the rangefinder or its rusted in place. Sometimes they just stick with age.
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grat



Joined: 17 Feb 2021
Posts: 9
Location: Gainesville, FL

PostPosted: Mon Feb 22, 2021 9:07 pm    Post subject: Reply with quote

Removal is easy. The threads are in good shape.

The problem is, the haze is *inside* the scope. I need to disassemble it to get to the inside surfaces. It would be like taking it apart to replace the spring.
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45PSS



Joined: 28 Sep 2001
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Location: Mid Peninsula, Ca.

PostPosted: Mon Feb 22, 2021 10:50 pm    Post subject: Reply with quote

I have never had one apart.
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45PSS



Joined: 28 Sep 2001
Posts: 3948
Location: Mid Peninsula, Ca.

PostPosted: Tue Feb 23, 2021 1:27 am    Post subject: Reply with quote

I just received a camera for servicing that has a FocuScope attached. The spring holds the front glass in place, the rear is bonded in place and the two sections are held together at the center. I suggest using a 1.2mm slot screwdriver or similar and pry the bevel outward until the sections separate, clean, reassemble, press the bevel down until it holds and the sections move freely.
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grat



Joined: 17 Feb 2021
Posts: 9
Location: Gainesville, FL

PostPosted: Tue Feb 23, 2021 3:17 am    Post subject: Reply with quote

Here's a terrible drawing:

)---===[[[[||

Where the )--- is the collapsing part, the ===[[[ is the body, and the || is the thread/end-piece with the lens in it.

I assume you mean the final "|" is press-fit into the threaded segment? It was the only explanation that made sense when I was looking at it, but I didn't want to guess.

Would I be better with a small screwdriver, or a plastic tool such as is used for modern snap-together electronics?

Since I essentially get one shot at this, I'd like to be fully forewarned.

I appreciate the info.
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45PSS



Joined: 28 Sep 2001
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Location: Mid Peninsula, Ca.

PostPosted: Tue Feb 23, 2021 6:09 am    Post subject: Reply with quote

https://drive.google.com/file/d/1Yy7RiZ27PiJmOf9cUVJAwGCbpuRQjJsk/view?usp=sharing
Separate at the arrow is my best guess.
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Dan Fromm



Joined: 14 May 2001
Posts: 2070
Location: New Jersey

PostPosted: Tue Feb 23, 2021 12:44 pm    Post subject: Reply with quote

Charles, I just tried to look at the drawing you posted on Google Drive. Please allow everyone to access it.
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45PSS



Joined: 28 Sep 2001
Posts: 3948
Location: Mid Peninsula, Ca.

PostPosted: Tue Feb 23, 2021 6:54 pm    Post subject: Reply with quote

The link should work.
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grat



Joined: 17 Feb 2021
Posts: 9
Location: Gainesville, FL

PostPosted: Tue Feb 23, 2021 10:19 pm    Post subject: Reply with quote

I'm getting access denied as well.
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45PSS



Joined: 28 Sep 2001
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Location: Mid Peninsula, Ca.

PostPosted: Tue Feb 23, 2021 11:05 pm    Post subject: Reply with quote

Good 'ol google, doesn't work as stated.
2nd attempt
https://drive.google.com/file/d/1Yy7RiZ27PiJmOf9cUVJAwGCbpuRQjJsk/view?usp=sharing
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grat



Joined: 17 Feb 2021
Posts: 9
Location: Gainesville, FL

PostPosted: Tue Feb 23, 2021 11:11 pm    Post subject: Reply with quote

That worked.

I would not have expected it to come apart there. Long day. I now comprehend.

Thanks!
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45PSS



Joined: 28 Sep 2001
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Location: Mid Peninsula, Ca.

PostPosted: Wed Feb 24, 2021 12:14 am    Post subject: Reply with quote

Its a sealed unit not designed to be taken apart but that's where I'd try.
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