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» 8mm Forum   » 8mm Forum   » ST-1200 HD 1.3 lens doesn't zoom?

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Author Topic: ST-1200 HD 1.3 lens doesn't zoom?
Akshay Nanjangud
Jedi Master Film Handler

Posts: 637
From: Dallas, TX
Registered: Nov 2011


 - posted August 04, 2012 03:08 PM      Profile for Akshay Nanjangud   Email Akshay Nanjangud   Send New Private Message       Edit/Delete Post 
The lens on my ST-1200 HD reads "Elmo Super Zoom Lens 1:1.3 f=12~25mm Japan". The focus knob does move the lens front and back but I can't rotate the lens to zoom. Does this not zoom?

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Hugh Thompson Scott
Film God

Posts: 3063
From: Gt. Clifton,Cumbria,England
Registered: Jan 2012


 - posted August 04, 2012 03:38 PM      Profile for Hugh Thompson Scott   Email Hugh Thompson Scott       Edit/Delete Post 
Hi Akshay,if your lens states 12-30 then it is the zoom lens,it may
have "locked" and should come free with a twist.

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Akshay Nanjangud
Jedi Master Film Handler

Posts: 637
From: Dallas, TX
Registered: Nov 2011


 - posted August 04, 2012 03:58 PM      Profile for Akshay Nanjangud   Email Akshay Nanjangud   Send New Private Message       Edit/Delete Post 
In the quote of my first post, I typed what's written on the lens. From your words and what my lens says, it looks like my lens is 12 to 25. The lens is pretty beat up as you can see in the pic. However hard I twist, it doesn't rotate.

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Joe Taffis
Phenomenal Film Handler

Posts: 1558
From: United States
Registered: Jun 2003


 - posted August 04, 2012 05:05 PM      Profile for Joe Taffis   Email Joe Taffis   Send New Private Message       Edit/Delete Post 
You're right Akshay, that is where its supposed to turn. Someone might have glued it.

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Joe Taffis

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Akshay Nanjangud
Jedi Master Film Handler

Posts: 637
From: Dallas, TX
Registered: Nov 2011


 - posted August 04, 2012 05:26 PM      Profile for Akshay Nanjangud   Email Akshay Nanjangud   Send New Private Message       Edit/Delete Post 
With the current zoom setting, I still get the image size I want in my screening room. So it works for now.

Oh, this gives me an excuse to look for a 1.1 or 1.0 lens.

Thanks, Joe and Hugh. [Smile]

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Tony Stucchio
Jedi Master Film Handler

Posts: 625
From: New Jersey
Registered: Dec 2005


 - posted August 04, 2012 08:30 PM      Profile for Tony Stucchio   Email Tony Stucchio   Send New Private Message       Edit/Delete Post 
Why on earth would someone glue a zoom lens so it doesn't zoom?
[Confused]

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Joe Taffis
Phenomenal Film Handler

Posts: 1558
From: United States
Registered: Jun 2003


 - posted August 04, 2012 10:04 PM      Profile for Joe Taffis   Email Joe Taffis   Send New Private Message       Edit/Delete Post 
It was just a thought Tony. Someone may have taken it apart to clean and couldn't get it back together. We've seen stranger things in this hobby....

--------------------
Joe Taffis

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Winbert Hutahaean
Film God

Posts: 5415
From: Nouméa, New Caledonia
Registered: Jun 2003


 - posted August 04, 2012 10:54 PM      Profile for Winbert Hutahaean   Email Winbert Hutahaean   Send New Private Message       Edit/Delete Post 
Or maybe the previous owner has a permanent set up, so didn't need to change the screen size. With the lens glued he was only to worry with the focus. Just a thought.

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Winbert

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frank arnstein
Jedi Master Film Handler

Posts: 531
From: Gold Coast. Australia
Registered: Jan 2005


 - posted August 05, 2012 12:21 AM      Profile for frank arnstein   Author's Homepage   Email frank arnstein   Send New Private Message       Edit/Delete Post 
Hi Ashkay

Try heating the whole lens with a hair dryer or warm it up in the sun. The original lubricant in the zoom thread may have gone hard and caused it to become seized. This has happened to me and the jammed lens came loose again after I left it in the sun for a few hours.

worth trying.

dogtor frankarnstein [Wink] [Razz]

--------------------
At Projector Heaven the Focus is always on Detail.

____
[o:/o]<|=- dogtor@projectorheaven.com.au
//``\\
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Winbert Hutahaean
Film God

Posts: 5415
From: Nouméa, New Caledonia
Registered: Jun 2003


 - posted August 05, 2012 12:51 AM      Profile for Winbert Hutahaean   Email Winbert Hutahaean   Send New Private Message       Edit/Delete Post 
Frank, won't that leaving under the sun or give some heat create fogging on the lens?

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Winbert

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Hugh Thompson Scott
Film God

Posts: 3063
From: Gt. Clifton,Cumbria,England
Registered: Jan 2012


 - posted August 05, 2012 04:25 AM      Profile for Hugh Thompson Scott   Email Hugh Thompson Scott       Edit/Delete Post 
It shouldn't do Winbert,any fogging usually disappears when a
lens gets warm.I still feel the lens has seized and needs a bit
of help.

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Vincent Zabbia
Master Film Handler

Posts: 372
From: Montrose, NY
Registered: Feb 2011


 - posted August 05, 2012 11:28 AM      Profile for Vincent Zabbia   Author's Homepage   Email Vincent Zabbia   Send New Private Message       Edit/Delete Post 
Try lighter fluid. This stuff loosens almost anything....

--------------------
Vincent Zabbia

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Akshay Nanjangud
Jedi Master Film Handler

Posts: 637
From: Dallas, TX
Registered: Nov 2011


 - posted August 05, 2012 06:05 PM      Profile for Akshay Nanjangud   Email Akshay Nanjangud   Send New Private Message       Edit/Delete Post 
I tried the hair-dryer trick, it didn't work.

Vincent, what do you mean by lighter fluid?

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Vincent Zabbia
Master Film Handler

Posts: 372
From: Montrose, NY
Registered: Feb 2011


 - posted August 05, 2012 06:32 PM      Profile for Vincent Zabbia   Author's Homepage   Email Vincent Zabbia   Send New Private Message       Edit/Delete Post 
It's called RONSONOL Lighter Fuel Made by Ronson.(used in Cigarette Lighters..Don't use near a flame...I've used it to loosen up old stiff binoculars I've collected through the years and works great. Has no lasting grease left behind. Dries up nice...

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Vincent Zabbia

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Akshay Nanjangud
Jedi Master Film Handler

Posts: 637
From: Dallas, TX
Registered: Nov 2011


 - posted August 05, 2012 07:07 PM      Profile for Akshay Nanjangud   Email Akshay Nanjangud   Send New Private Message       Edit/Delete Post 
Thanks very much, Vincent. Will write back after I've tried it.

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