8mm Forum: Specto lens, which machine?

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Topic: Specto lens, which machine?

Vic Newey
Film Handler

Posts: 41
From: Worcestershire, England
Registered: Dec 2015

posted November 23, 2017 06:17 AM

This lens has Specto f1.6 on it, the rear end is different to two others I have, which projector/gauge would it have been originally issued it with ?

[ November 23, 2017, 10:08 AM: Message edited by: Vic Newey ]

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Terry Sills
Phenomenal Film Handler

Posts: 1423
From: Weymouth,Dorset,England
Registered: Oct 2012

posted November 23, 2017 07:47 AM

It will fit any of the old Specto projectors and will probably be ok for all guages - STD 8, 9.5 and 16mm. Depending on the size of the rear glass.
You have a Specto I believe, so why not try it.

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Maurice Leakey
Film God

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

posted November 23, 2017 10:09 AM

The traditional shape Specto projectors were made for three separate gauges, 8mm, 9.5mm and 16mm, (and dual-gauge models), therefore they also had three different focal lengths to match.
Their lenses were, 1", 1.5", and 2".

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Maurice

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Vic Newey
Film Handler

Posts: 41
From: Worcestershire, England
Registered: Dec 2015

posted November 23, 2017 11:08 AM

Which gauge do you think it was intended for Maurice/Terry ?
The back lens is only 9mm, I just tried it with 9.5 & it gave a bigger picture which somewhat surprised me although I can't imagine it will be any good for 16mm

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Maurice Leakey
Film God

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

posted November 23, 2017 01:56 PM

1" lens was for 8mm.
1.5" lens was for 9.5mm.
2" lens was for 16mm.
All three on each gauge would produce the same size picture.

What focal length is the lens which you show?

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Maurice

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Clinton Hunt
Jedi Master Film Handler

Posts: 845
From: Waharoa,North Island,New Zealand
Registered: May 2010

posted November 23, 2017 11:16 PM

I too have Specto projectors,a 9.5mm and a Standard 8mm and they look identical apart from the gate etc.
I tried using my 8mm lens in my 9.5mm and it did give me a much bigger picture,but to me,it wasn't as sharp,so I put it back in my 8mm.
That info was probably "old news" haha

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Cheers from me in New Zealand :-)

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Terry Sills
Phenomenal Film Handler

Posts: 1423
From: Weymouth,Dorset,England
Registered: Oct 2012

posted November 24, 2017 02:13 AM

Vic
It looks like the one you have is a 1" which does give a bigger picture and I use it for 9.5mm because of that and I find it gives good definition too. I have also used it on a Bell&Howell 1698 16mm projector (with a sleeve) and it gives a nice big picture but you do suffer a little vignetting because the rear glass is too small for 16mm.

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Vic Newey
Film Handler

Posts: 41
From: Worcestershire, England
Registered: Dec 2015

posted November 26, 2017 07:01 AM

Yes, it has 1" engraved on it, my other two are 1/½" A Taylor Hobson f.1.9 and the other one reads as Dallmeyer 387287 F=1/½".

The 1" lens is about 1/2" longer than the others

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Maurice Leakey
Film God

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

posted November 26, 2017 09:20 AM

The 1" lens is really for a standard 8 projector, but will give you a larger picture than the 1.5" lens usually supplied with the 9.5mm model.

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Maurice

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