8mm Forum: What lens combo to use?

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Topic: What lens combo to use?

Bart Brummans
Junior
Posts: 3
From: Grand Haven, Michigan
Registered: Sep 2011

posted November 28, 2011 02:38 PM

I'm in the process of transferring our home movies to digital.
Already I have converted 2 bell & Howell projectors (8 and super 8) to perform this.
I'm using a machine vision camera with 1/2 ccd.
Working distance (from gate to lens front) will be between 100 and 125mm.
Normal 8 frame size is 3.3mm x 4.5mm I believe.

What lens (focal lenght) and or extension tubes do I need for this in order to capture the full frame on the entire ccd?

I've been looking for the past week with I net searches and am now thouroughly confused....

Any help / advise would be appreciated.

Regards, Bart

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Martin Jones
Phenomenal Film Handler

Posts: 1269
From: Thetford , Norfolk,England
Registered: May 2008

posted November 28, 2011 05:00 PM

If you can tell me the actual physical size of the camera sensor's active area I can work it out for you.
Martin

--------------------
Retired TV Service Engineer
Ongoing interest in Telecine....

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Bart Brummans
Junior
Posts: 3
From: Grand Haven, Michigan
Registered: Sep 2011

posted November 28, 2011 06:41 PM

Hello Martin,

Appreciate the help.

The CCD size has a 6.4mm Width and 4.8mm height.

Thanks, Bart

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Martin Jones
Phenomenal Film Handler

Posts: 1269
From: Thetford , Norfolk,England
Registered: May 2008

posted November 29, 2011 04:37 AM

Will work out later today (have visitors until about 8 pm)and give you an answer by tomorrow at latest I have recently gone through this exercise for my own rig!

Martin

--------------------
Retired TV Service Engineer
Ongoing interest in Telecine....

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Bart Brummans
Junior
Posts: 3
From: Grand Haven, Michigan
Registered: Sep 2011

posted November 29, 2011 08:13 PM

Thanks,

I appreciate it...

Bart

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