8mm Forum: Chinon 2500GL Lens problem

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Topic: Chinon 2500GL Lens problem

Alex Wilson
Junior
Posts: 17
From: Burlington, ON, Canada
Registered: Dec 2017

posted December 31, 2017 11:47 AM

Hello, I’m in need of help, I acquired a chinon 2500GL projector with a lens that was in a basket, it has 4 optics in it, but I do not know what order they go together.
One large lens is concaved and I presume it goes to the outside (bow side out)
The rest ... I’m lost...

Please help..

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Alex

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Joe Taffis
Phenomenal Film Handler

Posts: 1592
From: United States
Registered: Jun 2003

posted December 31, 2017 12:38 PM

Hello Alex, and welcome to the forum. Although I'm not familiar with your Chinon lens, you're correct about the curved side facing front. If any or all of the other three pieces are also concave, the curved side should also face front. At least that's my experience with projection lenses. If not, trial and error until you find the right combination...

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Joe Taffis

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Alex Wilson
Junior
Posts: 17
From: Burlington, ON, Canada
Registered: Dec 2017

posted December 31, 2017 02:21 PM

Thanks joe I will give it a try, I’m at a loss to know where they all go.

Happy new year.

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Alex

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Maurice Leakey
Film God

Posts: 5895
From: Bristol. United Kingdom
Registered: Oct 2007

posted December 31, 2017 02:45 PM

Here's a Chinon 2500GL for sale on US eBay for US$24.99.
The seller says it's not fully operational but it is shown with a lens.
https://www.ebay.com/itm/Chinon-2500-GL-Super-8-Regular-8-Projector-for-Parts-Repair-ONLY-2500GL-/142630804601?_trksid=p2349526.m4383.l4275.c20

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Maurice

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Janice Glesser
Film Goddess

Posts: 3468
From: Sunnyvale, CA USA
Registered: Sep 2011

posted December 31, 2017 04:46 PM

I have that projector with the same lens...but I'm don't want to take the lens apart. But...Alex if you can post a picture of the parts lined up it might be easier to help you put them in order. You just need to place the lenses going in the proper directions. A little trial and error...but you'll get it.

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Janice

"I'm having a very good day!"
Richard Dreyfuss - Let It Ride (1989).

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Alex Wilson
Junior
Posts: 17
From: Burlington, ON, Canada
Registered: Dec 2017

posted January 01, 2018 09:48 AM

I will lay out the parts and post them... thank you in advance.

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Alex

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Alex Wilson
Junior
Posts: 17
From: Burlington, ON, Canada
Registered: Dec 2017

posted January 03, 2018 11:35 AM

Ok, I seem to have assembled the lens correctly, and cleaned it as I went. But once I turned the projector on I see lots of ( what I call fuzz ) around the outer edge of the frame. I rotate the lense and the “fuzz” does not rotate.??
It looks like hairs or fuzz on the lens..

Any suggestions?

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Alex

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Janice Glesser
Film Goddess

Posts: 3468
From: Sunnyvale, CA USA
Registered: Sep 2011

posted January 03, 2018 12:33 PM

Alex...The fuzz you are seeing around the frame is not on the lens but rather in the gate frame opening. The 2500GL is notorius for collecting dust and debris from the air and dirty films.

You can use a few quick sprays of canned air to remove some of the debris...but I find if you remove the lens then using a cotton swab dipped in a little alcohol swipe it around the inside of the frame opening and a little in the gate path will clean it up nicely.

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Janice

"I'm having a very good day!"
Richard Dreyfuss - Let It Ride (1989).

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Alex Wilson
Junior
Posts: 17
From: Burlington, ON, Canada
Registered: Dec 2017

posted January 03, 2018 06:26 PM

Thanks Janice, seems that is the problem, I cleaned it, and ran a tape thru it, and got more debris... I will try the alcohol on a Q-Tip tomorrow. I will report my findings..

Thank you..

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Alex

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