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Kodak Commercial Ektar 10" f/6.3 No. 4 Acme Synchro Lens

The Kodak 10" f/6.3 is a lens from Kodak. Check GearFocus for current availability, with buyer protection on every purchase.

Kodak Commercial Ektar 10" f/6.3 No. 4 Acme Synchro Lens

Kodak Commercial Ektar 10" f/6.3 No. 4 Acme Synchro Lens

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Lens Overview — Kodak 10" f/6.3

The Kodak Commercial Ektar 10" f/6.3 is a large format lens from the 1950s, designed for professional and commercial photography applications. Mounted in a No. 4 Acme Synchro leaf shutter, this lens was built during an era when large format photography was the standard for high-quality commercial and studio work. The lens is designed for use on technical cameras via a lens board mount, making it compatible with a wide range of large format field and studio cameras that accept standard lens board configurations.

Its manual focus operation is characteristic of large format photography practice, where precise focus is achieved through ground glass viewing and careful adjustment. The lens carries compatibility with sheet film formats including 4x5, 5x7, and 8x10, giving shooters flexibility across several common large format film sizes. The No. 4 Acme Synchro shutter provides synchronized exposure control, and flash compatibility is listed as none, reflecting the standalone mechanical nature of this vintage unit.

With a focal length of 10 inches and a maximum aperture of f/6.3, this lens represents a well-regarded piece of mid-century American optical manufacturing, appealing to large format photographers, collectors, and those exploring vintage photographic processes.

Key Features — Kodak 10" f/6.3

254mm f/6.3 Optics: A 10-inch focal length with a maximum aperture of f/6.3, well matched to commercial studio work and portraiture on large format.

No. 4 Acme Synchro Shutter: Integrated leaf shutter provides mechanical exposure control with synchronized firing, common in mid-century professional large format setups.

Large Format Coverage: Designed to cover large format sheet film; confirmed coverage includes 5x7 and 8x10 formats, with suitability for 4x5 as well.

Lens Board Mount: Mounts via a standard lens board, offering broad compatibility with field and studio technical cameras that accept interchangeable boards.

Manual Focus Design: Focus is set manually, consistent with large format practice where precise focus is confirmed through ground glass viewing.

1950s American Manufacture: Produced by Kodak in the United States during the 1950s, a period when Commercial Ektar lenses were widely trusted for professional and commercial work.

Lens Specifications — Kodak 10" f/6.3

Kodak 10" f/6.3 full specifications
SpecDetail
Use CasesArchitecture, Product, Studio
Lens MountLens Board (Technical Camera)
Focus TypeManual Focus

Description — Kodak 10" f/6.3

The Kodak Commercial Ektar 10" f/6.3 is a vintage large format lens manufactured during the 1950s, designed for professional sheet film photography. Housed in a No. 4 Acme Synchro leaf shutter, it offers mechanical exposure control well-suited to deliberate, studio-oriented large format workflows. The lens attaches via a lens board mount, compatible with technical cameras that accept standard large format lens boards.

It supports sheet film formats including 4x5, 5x7, and 8x10, providing flexibility across the most common large format film sizes. Focus is entirely manual, in keeping with large format photographic practice. Flash compatibility is listed as none in the specifications.

This lens appeals to large format photographers, film enthusiasts, and collectors interested in mid-century American optical equipment.

Pros — Kodak 10" f/6.3

  • ✓10" focal length suits a variety of large format shooting distances and compositions
  • ✓Maximum aperture of f/6.3 is well-suited to large format commercial and studio work
  • ✓No. 4 Acme Synchro leaf shutter provides mechanical exposure control

Cons — Kodak 10" f/6.3

  • ✗Manual focus only — no autofocus support of any kind
  • ✗No flash compatibility listed, limiting mixed-lighting setups without additional hardware
  • ✗Lens board mount requires careful matching to specific camera systems

Videos — Kodak 10" f/6.3

NOS Ilex Shutter No.3 X Oscillo-paragon w/ TRX 88mm f;1.4 lens set — greenerwheels

Resources & Downloads — Kodak 10" f/6.3

Manuals & Guides

Frequently Asked Questions — Kodak 10" f/6.3

What film formats is this lens compatible with?+
According to the specifications, this lens is compatible with sheet film formats including 4x5, 5x7, and 8x10. It is designed for use with large format sheet film cameras.
What type of shutter does this lens use?+
The lens is mounted in a No. 4 Acme Synchro leaf shutter, as stated in the specifications. This is a mechanical shutter typical of large format lenses from this era.
How does this lens attach to a camera?+
The lens uses a lens board mount intended for technical cameras. Buyers should verify that their camera system accepts the specific lens board size required for this No. 4 Acme Synchro shutter.
Is this lens compatible with flash equipment?+
The specifications list flash compatibility as none. Photographers wishing to use flash with this lens should research additional sync or triggering options separately.
When was this lens manufactured?+
According to the specifications, this lens was manufactured between 1950 and 1959, placing it firmly in the mid-twentieth century era of large format commercial photography.
Does this lens support autofocus?+
No. The specifications list the focus type as manual focus only, which is standard for large format lenses of this type and period.

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