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Pentax FA 645 200mm f/4 IF lens, black barrel with silver mount ring

PENTAX

PENTAX FA 645 200mm f/4 IF camcorder lens

SKU CH-FZQR-CXT7M

Medium-format telephoto lens with 200mm focal length and 157mm 35mm equivalent for distant subjects

  • TypeLenses Accessories
  • Medium-format reach with 157 mm equivalent focal length
  • Internal focus keeps lens length constant during focusing
  • Two ED glass elements correct chromatic aberration
  • Ghostless coating reduces internal reflections for contrast
  • Fast f/4 aperture suits low-light and moving subjects

Medium-format telephoto for 645 system

The Pentax FA 645 200mm f/4 IF lens is built for the Pentax 645 medium-format platform. It provides a 35mm-equivalent focal length of 157mm, making it suitable for distant subject compression. Photographers who need a long focal length on this specific mount will find it fits directly. It is not for shooters using 35mm-format cameras or other lens mounts.

Internal focusing maintains length during use

The internal focusing mechanism keeps the barrel from extending while the lens hunts or locks focus. This stability helps when the camera is mounted on a tripod or gimbal because the centre of gravity does not shift. Both manual and autofocus operation are available, so the user can choose the method that suits the workflow. The physical size stays constant from closest focus to infinity.

Two ED elements control chromatic aberration

Two extra-low dispersion glass elements correct colour fringing across the frame, which is the primary optical safeguard for high-resolution medium-format capture. Ghostless coating suppresses internal reflections that would otherwise reduce contrast. The f/4 maximum aperture supplies a consistent brightness level for composition and exposure decisions. Buyers who need wider apertures or built-in stabilisation must look elsewhere.

Highlights

  • Medium-format reach with 157 mm equivalent focal length
  • Internal focus keeps lens length constant during focusing
  • Two ED glass elements correct chromatic aberration
  • Ghostless coating reduces internal reflections for contrast
  • Fast f/4 aperture suits low-light and moving subjects

Specifications

BrandPENTAX
ModelNot Available
TypeLenses Accessories

Questions about this item

Does the 200mm f/4 IF lens run hot or draw extra power during long shoots?

The Pentax FA 645 200mm f/4 IF is a passive optical lens with no electronics that generate heat or consume power.

What camera mount does the 645 lens need to attach to my body?

It uses the Pentax 645 bayonet mount, so you must own a Pentax 645 medium-format camera or a compatible adapter.

Will the 157mm equivalent focal length work with my older 645 film bodies?

Yes, the FA 645 200mm f/4 IF mounts natively on legacy Pentax 645 film cameras and provides the same 157mm field of view.

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