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Author
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Topic: Information on NASA 70mm projection slides
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Chuckster01
Member Posts: 873
From: Orlando, FL
Registered: Jan 2014
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posted 12-08-2019 04:01 AM
   
I have come across a box of about 90 old 70mm Hasselblad type projection slides much like the common 35mm slides they are just much larger. These are copies of the hand numbers images from Apollo 10 and Apollo 11 with the numbers and tractor holes clearly visible on the top or each slide.I have never seen a 70mm projector but I would now assume that they did exist so has anyone ever seen one of these 70mm slides in the past or has anyone ever encountered a slide projector able to show these over-sized 70mm slides? I can post pictures if needed. |
Joel Katzowitz
Member Posts: 808
From: Marietta GA USA
Registered: Dec 1999
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posted 12-08-2019 07:26 AM
I recently got my hands on some "slides" that sound similar to what you have Chuck. They are obviously hand made with two pieces of thin glass taped together around the perimeter with a metallic silver tape. They are 3 1/4" x 4" overall and sandwiched between the glass plates is a 70mm frame of positive film. They came from the Richard Underwood estate and in his oral history he mentions similar slides being projected for presentations. My slides include GT-6 and 7 images. I'd be delighted if anyone can give me more insight into these slides. |
Cozmosis22
Member Posts: 968
From: Texas * Earth
Registered: Apr 2011
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posted 12-08-2019 07:53 AM
While those large transparencies could have been projected onto a screen with the old-school overhead projector systems in use back in the day; believe they were initially mounted that way to facilitate their primary use with darkroom enlarger equipment for making paper prints. |
Chuckster01
Member Posts: 873
From: Orlando, FL
Registered: Jan 2014
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posted 12-08-2019 10:25 AM
I have seen the glass slides in the past but mine are paper encased just like a normal 35mm slide and no glass. I will post pictures when I have time. |
Robert Pearlman
Editor Posts: 42988
From: Houston, TX
Registered: Nov 1999
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posted 12-08-2019 10:30 AM
I have also seen these larger-size slides and my understanding, as Brian (Cozmosis22) suggested, was that these were distributed to the media for photo insertion into newspapers and magazines, as well used in the production of photo prints. They were not intended for projection. |
Joel Katzowitz
Member Posts: 808
From: Marietta GA USA
Registered: Dec 1999
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posted 12-08-2019 03:51 PM
This is from the Underwood oral history: We had the big glass slides at that point. This project had gone on and I had been at work, I guess about forty hours, and it was in the morning and I realized that thirty-nine people had seen pictures of someone walking on the Moon, mainly in Building 37 and Building 8, the only place people had seen them, some as film, some as projections in Building 37.And I cut the glass slides and I got the big glass slide projector, which weighed about fifty pounds, and I brought it on home. I wanted the first people outside that gate to see someone walking on the Moon would be my children and my wife. His reference to the "big glass slide projector" sure make it sound like these slides may have been projected onto a screen. |
Robert Pearlman
Editor Posts: 42988
From: Houston, TX
Registered: Nov 1999
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posted 12-08-2019 04:45 PM
To clarify, my comments were about Chuck's "slides," which from his description are not glass. They are larger format transparencies.Yours from the Underwood estate may have been for projection as the oral history describes. |
Chuckster01
Member Posts: 873
From: Orlando, FL
Registered: Jan 2014
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posted 12-08-2019 07:41 PM
Here are a couple of pictures so you can see what I have. 
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Cozmosis22
Member Posts: 968
From: Texas * Earth
Registered: Apr 2011
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posted 12-09-2019 07:04 AM
Okay, those are medium format slides and they can be projected using somewhat rare and expensive equipment that was made by a few companies in Europe like Goetschmann, Hasselblad, Leitz, and Rollei. There doesn't appear to be anyone making them any more. The preferred projector is of course the Hassleblad 80 which runs in the thousands of dollars. Then there is the rather nice Rollei P11 medium format projector which can be found for less than $500. Mounted like that those individual slides would also be used in the darkroom when making prints and enlargements. Here's a Rollei on eBay right now. |
Robert Pearlman
Editor Posts: 42988
From: Houston, TX
Registered: Nov 1999
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posted 12-09-2019 11:21 AM
quote:
Originally posted by Chuckster01:
Here are a couple of pictures so you can see what I have.
That was not what I was expecting you to have based on your description, so please disregard my earlier comments. |
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