8mm Forum: Cleaning Elmo f1.0 lens

8mm Forum

my profile | my password | search | faq | register | forum home

next oldest topic

next newest topic

»	8mm Forum » 8mm Forum » Cleaning Elmo f1.0 lens

UBBFriend: Email this page to someone!

Author

Topic: Cleaning Elmo f1.0 lens

Paul Adsett
Film God

Posts: 5003
From: USA
Registered: Jun 2003

posted August 31, 2007 01:14 PM

Send New Private Message

Edit/Delete Post

I have been struggling for over a year to find a way to clean inside my Elmo f1.0 lens, which has developed internal smearing which can't be removed externally. The problem was removing the lens sleeve which clamps the big outer objective lens. I just could not budge it. I had contacted Ugo and he told me to put tape around the lens barell and turn really hard to remove the front lens element. This did not work and I almost sprained my wrist trying. Well, at the BFCC in May I was chatting to someone about this (might have been Adrian) and he told me to apply a few drops of alcohol around the edge of the front sleeve, where Elmo had put some tacking glue. I was skeptical, but last week I decided to give it a shot. I wiped the bonded area with a cotton swab soaked in alcohol and let the lens sit overnight. The next day I was able to unscrew the front lens sleeve with no trouble at all! I took out the big objective lens and washed it in distilled water with a drop of dishwashing liquid. This removed all the haze from the lens which is now crystal clear. I reassembled the lens and noticed a significant improvement in picture sharpness and contrast.

--------------------
The best of all worlds- 8mm, super 8mm, 9.5mm, and HD Digital Projection,
Elmo GS1200 f1.0 2-blade
Eumig S938 Stereo f1.0 Ektar
Panasonic PT-AE4000U digital pj

| IP: Logged

John Clancy
Phenomenal Film Handler

Posts: 1954
From: Cornwall
Registered: Jun 2003

posted August 31, 2007 03:08 PM

Author's Homepage

Send New Private Message

Edit/Delete Post

Wonderful Paul. Now I know who to call when the fogging in my own pair of F1.0's gets to the point that it's noticeable.

In fact, I'll bring them with me when I finally get out to Florida!!!

--------------------
British Film Collectors Convention home page www.bfcc.biz. The site is for the whole of the film collecting hobby and not just the BFCC.

| IP: Logged

Joe Taffis
Phenomenal Film Handler

Posts: 1592
From: United States
Registered: Jun 2003

posted August 31, 2007 09:16 PM

Email Joe Taffis

Send New Private Message

Edit/Delete Post

Thanks for that info Paul...good to know [Smile]

[Smile]

[ November 02, 2009, 07:33 AM: Message edited by: Joe Taffis ]

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

| IP: Logged

Graham Ritchie
Film God

Posts: 4001
From: New Zealand
Registered: Feb 2006

posted September 01, 2007 01:46 AM

Email Graham Ritchie

Send New Private Message

Edit/Delete Post

Paul
Thats excellent, are the Elmo 1.1 and 1.3 lenses the same to dismantle, or are they quite different to the 1.0, cant figure out how those ones come apart.

Graham.

| IP: Logged

Paul Adsett
Film God

Posts: 5003
From: USA
Registered: Jun 2003

posted September 01, 2007 12:55 PM

Send New Private Message

Edit/Delete Post

Hi Graham,
Looks like they are all designed differently. The f1.3 is easy to disassemble, just turn the knurled zooming ring all the way anti-clockwise and it will loosen up and unscrew. You can then pop out the lenses.
The f1.1 may be the most difficult. Looks like you have to get a special tool to engage the two slots on the lens retaining ring buried down inside the front of the lens. This is risky because you could easily scratch the lens if the tool pops out of the slots, so I have not tried this. In any case, my particular f1.1 and f1.3 lenses are clear, and do not show the fogging problem that I had on the f1.0, which of course is the lens that I always use on my Elmo's.

--------------------
The best of all worlds- 8mm, super 8mm, 9.5mm, and HD Digital Projection,
Elmo GS1200 f1.0 2-blade
Eumig S938 Stereo f1.0 Ektar
Panasonic PT-AE4000U digital pj

| IP: Logged

Graham Ritchie
Film God

Posts: 4001
From: New Zealand
Registered: Feb 2006

posted September 01, 2007 02:26 PM

Email Graham Ritchie

Send New Private Message

Edit/Delete Post

Thanks Paul
I have a Elmo 1.3 lens which is foggy, looks bad on the inside, although I dont use these days, I will "hopefully" dismantle it and give it a good clean.

Graham. [Smile]

[Smile]

| IP: Logged

Tony Milman
Phenomenal Film Handler

Posts: 1336
From: United Kingdom
Registered: Jun 2003

posted September 02, 2007 01:42 AM

Author's Homepage

Email Tony Milman

Send New Private Message

Edit/Delete Post

Has anyone ever tried to get a lens element re-coated? I have often wondered if say on e of the spectacle manufacturers you find in the high street would be willing and able to do this and if there would be any advantage

--------------------
Tony

| IP: Logged

Graham Ritchie
Film God

Posts: 4001
From: New Zealand
Registered: Feb 2006

posted September 02, 2007 01:48 AM

Email Graham Ritchie

Send New Private Message

Edit/Delete Post

Paul
Managed to dismantle and clean the two spare 1.3 lenses I have, one of them came with a projector that had been sitting in a damp cupboard for years, they both look good now.

Thanks, Graham. [Smile]

[Smile]

| IP: Logged

Antonio Costa Mota
Expert Film Handler

Posts: 171
From: Portugal
Registered: Jun 2004

posted September 02, 2007 04:20 PM

Email Antonio Costa Mota

Send New Private Message

Edit/Delete Post

Paul
Would it be possible, if you would be kind enough, to show us
a pic of the lens with an indication of where exactly you
successfully applied the alchool. Many thanks and best regards.

--------------------
António C. Mota

| IP: Logged

Michael De Angelis
Phenomenal Film Handler

Posts: 1261
From: USA
Registered: Jul 2003

posted September 02, 2007 09:50 PM

Email Michael De Angelis

Send New Private Message

Edit/Delete Post

Paul,

Good job and thanks for sharing.

--------------------
Isn't it great that we can all communicate about this great
hobby that we love!

| IP: Logged

Joe Taffis
Phenomenal Film Handler

Posts: 1592
From: United States
Registered: Jun 2003

posted February 22, 2013 02:23 PM

Email Joe Taffis

Send New Private Message

Edit/Delete Post

Thought I would resurrect this thread in case anyone is wondering what exactly is inside the Elmo f1.0 lens. I recently took mine apart to clean it completely, not just the big lens in the front. Along with that one and the fixed rear element, there are three inner glass elements. I cleaned them all very gently with lens cleaner, and now it's much clearer [Smile]

[Smile]

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

| IP: Logged

Paul Adsett
Film God

Posts: 5003
From: USA
Registered: Jun 2003

posted February 22, 2013 03:58 PM

Send New Private Message

Edit/Delete Post

Well done Joe. I have been able to remove the big outer lens, but how did you get the smaller lenses out?

--------------------
The best of all worlds- 8mm, super 8mm, 9.5mm, and HD Digital Projection,
Elmo GS1200 f1.0 2-blade
Eumig S938 Stereo f1.0 Ektar
Panasonic PT-AE4000U digital pj

| IP: Logged

Jean-Marc Toussaint
Film God

Posts: 2392
From: France
Registered: Oct 2004

posted February 22, 2013 04:21 PM

Author's Homepage

Email Jean-Marc Toussaint

Send New Private Message

Edit/Delete Post

Yes, please explain. I sense a serious 1.0 spring cleaning fever growing among forum members.

--------------------
The Grindcave Cinema Website

| IP: Logged

Brian Stearns
Master Film Handler

Posts: 487
From: Lexington
Registered: Jun 2013

posted October 04, 2013 03:29 PM

Edit/Delete Post

I have a 1.3 elmo lens that's cloudy I don't understand how to take it apart. When I then it counter clockwise It does not unscrew.

I wish I could clean it and not have to pay a lot for a replacement

| IP: Logged

Antoine Orsero
Master Film Handler

Posts: 374
From: marseille france
Registered: Jun 2003

posted June 23, 2016 04:50 AM

Author's Homepage

Send New Private Message

Edit/Delete Post

I managed was disassembling the front lens of the Elmo 1.0 and I cleaned it!

But I do not know how to disassemble the other lenses

--------------------
Tony

| IP: Logged

Phil Murat
Jedi Master Film Handler

Posts: 671
From: Villeneuve St Georges, France
Registered: Dec 2015

posted June 23, 2016 10:09 AM

Email Phil Murat

Send New Private Message

Edit/Delete Post

Hi Paul,

Thanks for this interesting information.

That works also for Schneider Lens Too (Heurtier, Beaulieu, etc...)

- Untighten "Counter Clockwise" the front plastic barrel, the front lens is well fitted in its housing.
- Do not overtighten during reassembly

-Concerning the secondary lens pack............I assume this is an other story

Phil

[ June 23, 2016, 12:42 PM: Message edited by: Phil Murat ]

| IP: Logged

Joe Taffis
Phenomenal Film Handler

Posts: 1592
From: United States
Registered: Jun 2003

posted June 23, 2016 01:09 PM

Email Joe Taffis

Send New Private Message

Edit/Delete Post

Antoine,
You need a spanner wrench to loosen and remove the metal ring after removing the first large lens. The rest of the pieces are just layered inside. Just be sure to put them back in the same order. Once the inner pieces are removed you can clean the inside of the fixed rear element from the front through the empty lens barrel before re-assembling [Smile]

[Smile]

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

| IP: Logged

Antoine Orsero
Master Film Handler

Posts: 374
From: marseille france
Registered: Jun 2003

posted June 23, 2016 01:36 PM

Author's Homepage

Send New Private Message

Edit/Delete Post

Thank you very much

--------------------
Tony

| IP: Logged

All times are Central

Move Topic

Delete Topic

next oldest topic

next newest topic

Printer-friendly view of this topic

Visit www.film-tech.com for free equipment manual downloads. Copyright 2003-2019 Film-Tech Cinema Systems LLC

UBB.classic^TM 6.3.1.2