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Black Pentax 645 medium-format telephoto lens, 200mm f/4, 11.9 cm long, 7.45 cm diameter, 6.7 cm filter thread

PENTAX

PENTAX SMC FA 645 200mm F4 IF Camera Lens Black

SKU CH-534X-8S09J

Medium-format telephoto lens with 200 mm focal length, 35 mm-equivalent 157 mm, autofocus and f/4–32 aperture range

  • Focus systemAuto Focus
  • Product typeZoom Lens
  • Product colorBlack
  • Fast f/4 aperture captures bright images in low light
  • Internal focus keeps barrel length fixed at 11.9 cm
  • 200 mm focal length reaches 157 mm equivalent on 645D
  • 7 cm filter thread accepts standard accessories
  • SMC coating reduces flare for high-contrast results

Medium-format telephoto lens

The Pentax SMC FA 645 200mm F4 IF is a new autofocus lens built for the 645D medium-format system. Its 200 mm focal length delivers a 35 mm-equivalent field of view of 157 mm, making it suited to compressed perspective work such as portraiture or distant detail. The optical design uses seven elements in seven groups, including two extra-low dispersion glass elements to control chromatic aberration. A ghostless coating reduces internal reflections for cleaner contrast.

Aperture range and close focus

The diaphragm opens from f/4 to f/32, giving control over depth of field and exposure in varied lighting. Internal focusing keeps the barrel at a constant 11.9 cm length during focus travel, which helps balance on a tripod and prevents the front element from rotating. Maximum magnification is 0.16x, so the lens is not intended for high-reproduction macro work. Accepts 6.7 cm filters via the 7.45 cm front diameter.

Coatings and system integration

Super Multi Coating on the glass surfaces suppresses flare and ghosting while contributing to a smooth out-of-focus rendition. The ghostless coating specifically targets reflections on inner lens surfaces to preserve contrast in backlit scenes. Autofocus is driven by the camera body, so AF speed and accuracy depend on the 645D system used. No tripod collar, hood or pouch is listed in the supplied data.

How it compares

Measured against everything we stock in Interchangeable Camera Lenses, at today’s prices. Recalculated every night.

Price $738.99
Pricier than about 66% of the 2,570 comparable items (median $546.49).

Specifications

Product
Brand namePENTAX
Model nameNot Available
Product typeZoom Lens
Product colorBlack
Audio & video
Focus systemAuto Focus

Questions about this item

How do I mount the 645-mount 200mm F4 lens on my 645D, and what step do people miss?

Align the red dot on the lens barrel with the mount index, twist until it clicks, then set the aperture ring to the A position so the camera can control the 4–32 range automatically.

What maintenance will the 7-element SMC-coated lens need over time?

Clean the front 6.7 cm filter threads and rear element with a blower and microfibre cloth; the internal focus design keeps the 11.9 cm barrel length constant, so no helicoid lubrication is required.

What limit appears first when I shoot continuously at 200mm F4 on the 645D?

The 0.16x maximum magnification and 157mm equivalent focal length restrict close-up detail long before any thermal or buffer constraint becomes an issue.

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