Author Topic: Prototype of a zoom lens for 4x5!  (Read 599 times)

Akira

  • Homo jezoensis
  • NG Supporter
  • **
  • Posts: 8245
  • Tokyo, Japan
    • Akira on flickr
Prototype of a zoom lens for 4x5!
« on: January 27, 2019, 09:49:41 »
Nex to the Fujifilm Square (showroom and gallery) in Roppongi, Tokyo, there is Photo History Musium where cameras and lenses that were epoch-making at various times in the history of photography.

Among the displayed items, I found an abnormally large zoom designed for the 4x5 format.  It is a 150-210mm/f5.6 constant aperture "standard" zoom.  Here is a picture.  Fuji's film SLR of a standard size should tell the size of the zoom and magnitude of my surprize.

Hope you enjoy it!
"The eye is blind if the mind is absent." - Confucius

"Limitation is inspiration." - Akira

Birna Rørslett

  • Global Moderator
  • **
  • Posts: 1374
  • A lesser fierce bear of the North
Re: Prototype of a zoom lens for 4x5!
« Reply #1 on: January 27, 2019, 10:53:50 »
Poor Copal shutter and the strain it'll have to cope with ....

Akira

  • Homo jezoensis
  • NG Supporter
  • **
  • Posts: 8245
  • Tokyo, Japan
    • Akira on flickr
Re: Prototype of a zoom lens for 4x5!
« Reply #2 on: January 27, 2019, 11:54:05 »
...and the lens plate.
"The eye is blind if the mind is absent." - Confucius

"Limitation is inspiration." - Akira

Birna Rørslett

  • Global Moderator
  • **
  • Posts: 1374
  • A lesser fierce bear of the North
Re: Prototype of a zoom lens for 4x5!
« Reply #3 on: January 27, 2019, 12:37:40 »
The Copal shutter would be a part of the front plate so the strain might be severe with that apparently heavy zoom lens. And considering the rather small size of prime lenses in this focal range, and the ease of snapping in or out a front plate with the respective lens mounted, I'm a little surprised the company went to the efforts of making that huge zoom lens.

I did a lot of work in the film days with 150/5.6, 210/5.6, and 270/6.3 T-ED Nikkors on my 4x5" Arca-Swiss camera. If I deployed the 360/8 or 500/11 Nikkor-T ED, an extension bellows was required.

Akira

  • Homo jezoensis
  • NG Supporter
  • **
  • Posts: 8245
  • Tokyo, Japan
    • Akira on flickr
Re: Prototype of a zoom lens for 4x5!
« Reply #4 on: January 27, 2019, 14:22:44 »
I also wondered about the purpose of the lens.  My friend pro photographer suspected it would make it easy to adjust the view angle when you would do the product photograhy, but then one would doubt if the hugely asymmetric lens could perform decently in such a proximity.  Or was it designed as a zoom micro...well, not likely...
"The eye is blind if the mind is absent." - Confucius

"Limitation is inspiration." - Akira

Dr Klaus Schmitt

  • NG Member
  • *
  • Posts: 807
Re: Prototype of a zoom lens for 4x5!
« Reply #5 on: January 27, 2019, 18:05:28 »
Interesting! Surplus Shed has a COMPUTAR MF zoom lens for sale since long ... very cheap ;-)
105mm to 150mm, f/4.5 to f/5.6, AR coated elements, covers 4x5" as per the description
formerly known as kds315

Akira

  • Homo jezoensis
  • NG Supporter
  • **
  • Posts: 8245
  • Tokyo, Japan
    • Akira on flickr
Re: Prototype of a zoom lens for 4x5!
« Reply #6 on: January 27, 2019, 21:34:33 »
Interesting! Surplus Shed has a COMPUTAR MF zoom lens for sale since long ... very cheap ;-)
105mm to 150mm, f/4.5 to f/5.6, AR coated elements, covers 4x5" as per the description

Is it equally huge?  (Well, it should be...)
"The eye is blind if the mind is absent." - Confucius

"Limitation is inspiration." - Akira

Dr Klaus Schmitt

  • NG Member
  • *
  • Posts: 807
Re: Prototype of a zoom lens for 4x5!
« Reply #7 on: January 28, 2019, 19:30:17 »
Is it equally huge?  (Well, it should be...)

"Front clear lens diameter is 50mm and rear clear lens diameter is 30mm. Barrel is 70mm diameter, Front lens shade is 85mm diameter."
formerly known as kds315

Jack Dahlgren

  • NG Supporter
  • **
  • Posts: 952
  • You ARE NikonGear
Re: Prototype of a zoom lens for 4x5!
« Reply #8 on: January 28, 2019, 20:17:34 »
"Front clear lens diameter is 50mm and rear clear lens diameter is 30mm. Barrel is 70mm diameter, Front lens shade is 85mm diameter."

It appears to cover 4x5 only at one end.

Akira

  • Homo jezoensis
  • NG Supporter
  • **
  • Posts: 8245
  • Tokyo, Japan
    • Akira on flickr
Re: Prototype of a zoom lens for 4x5!
« Reply #9 on: January 28, 2019, 21:46:31 »
"Front clear lens diameter is 50mm and rear clear lens diameter is 30mm. Barrel is 70mm diameter, Front lens shade is 85mm diameter."

That small?  Isn't it designed for the larger-than-life magnification only?
"The eye is blind if the mind is absent." - Confucius

"Limitation is inspiration." - Akira

Frank Fremerey

  • engineering art
  • NG Supporter
  • **
  • Posts: 10259
  • Bonn, Germany
Re: Prototype of a zoom lens for 4x5!
« Reply #10 on: January 29, 2019, 09:07:12 »
Poor Copal shutter and the strain it'll have to cope with ....

To hold a 600mm Nikkor an old colleague used to mount it to a second tripod with his Linhof Technikardan on the first tripod, look:

(picture taken with my father's Minolta Dimage 7 before I bought my first own Digital Camera)
You are out there. You and your camera. You can shoot or not shoot as you please. Discover the world, Your world. Show it to us. Or we might never see it.

Birna Rørslett

  • Global Moderator
  • **
  • Posts: 1374
  • A lesser fierce bear of the North
Re: Prototype of a zoom lens for 4x5!
« Reply #11 on: January 29, 2019, 13:24:48 »
These are my long focal "twins" in the Nikkor-T ED line: 360mm f/8 and 500mm f/11. They had exchangeable dedicated rear sections that turned them from one focal length to the other. With a 30 cm long bellows they would work well on my Arca-Swiss 4x5" monorail and as they were relatively speaking "featherweights", usually no extra tripod support was required.

There was a third sibling, the 720mm f/16 T-ED, which I skipped because it required more bellows draw than was practical in the field.



As these lenses were true telephoto designs, one needed far less bellows extension than with standard long-focal lenses.

Akira

  • Homo jezoensis
  • NG Supporter
  • **
  • Posts: 8245
  • Tokyo, Japan
    • Akira on flickr
Re: Prototype of a zoom lens for 4x5!
« Reply #12 on: January 29, 2019, 14:00:58 »

To hold a 600mm Nikkor an old colleague used to mount it to a second tripod with his Linhof Technikardan on the first tripod, look:

(picture taken with my father's Minolta Dimage 7 before I bought my first own Digital Camera)

Apparently, the front part of this field camera is detached in order to achieve the necessary extention?
"The eye is blind if the mind is absent." - Confucius

"Limitation is inspiration." - Akira

Frank Fremerey

  • engineering art
  • NG Supporter
  • **
  • Posts: 10259
  • Bonn, Germany
Re: Prototype of a zoom lens for 4x5!
« Reply #13 on: January 29, 2019, 18:05:47 »
Apparently, the front part of this field camera is detached in order to achieve the necessary extention?

as I see it the front standart is 4*5 inch, the bellows between first and second standart expands from 4*5 to 5*7 or 8*10 which is also the format of the third standart. He also seems to have another bellows as Compendium to protect the front lens from stray light and there is a supporting rail connecting both tripods. It took him very long to install all this, while I was already taking pictures
You are out there. You and your camera. You can shoot or not shoot as you please. Discover the world, Your world. Show it to us. Or we might never see it.

Dr Klaus Schmitt

  • NG Member
  • *
  • Posts: 807
Re: Prototype of a zoom lens for 4x5!
« Reply #14 on: January 30, 2019, 09:14:32 »
That small?  Isn't it designed for the larger-than-life magnification only?

at 105mm and f5.6 you only need 18.75mm lens diameter in theory ;-)
formerly known as kds315