Pentax SMCP-FA 50mm brilliant f/1.4 aperture standard autofocus lens

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No other lens in Pentax's current stable can create creamy defocus backgrounds like this one

Pentax SMCP-FA 50mm f/1.4 Lens An excellent selection for poor light handheld shooting, and effectively turns into a short bright telephoto lens for portrait work when mounted upon an APS-C series DSLR camera. Pentax Super Multi Coati allows the highest possible light transmission.

This fast, normal prime has been marketed for more than ten years, but there's not another lens in Pentax's current stable can create creamy defocus backgrounds like this one. Even better, mounted on a Pentax K10D, K100D, or K100D Super DSLR, it turns into a medium-telephoto 75mm, becoming fine lens for portrait photography. Better still? The ($449, typical internet price).

It's half an inch shorter plus several ounces less weight than similar Canon or Nikon 50mm f/1.4s, although this full-frame lens predates digital. A small, rubber-covered, manual-focus ring with bit rough turning action. Distance scales are big and easily legible; same thing for the depth-of-field scale. Autofocus is quick and stealth.

Sharp, bright, and nearly distortion-free, any Pentax shooter should have a place in their bag for this lens. Particularly wedding photographers will treasure it for its low-light performance, defocused backgrounds, plus a focal length suitable for two-up verticals. May 11, 2011 ✓


The Pentax SMCP-FA 50mm f1.4 lens has a fully automatic diaphragm. At 1.5 inches long and weighing just 7.8 ounces, you can take this 50mm fixed focal length lens with you everywhere. You can use this lens with all Pentax SLR cameras, but the AF system only works with Pentax AF cameras.

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Lens stylePrime lens  
Max Format Size 35mm FF  
Lens focal length50 mm  
Stabilization type No  
Camera mount Pentax KAF  
Angle of view 47 Degrees  
Largest aperture opening F1.4  
Smallest aperture opening F22.0  
Includes aperture ring Yes  
Total diaphragm blades 8  
Total Elements 7  
Number of Groups 6  
Minimum focus distance 0.45 m (17.72")  
Maximum magnification ratio 0.15 x  
Autofocus type Yes  
Lens motor Screw drive from camera  
Full time manual focus Unknown  
Focusing method Unit  
Lens distance scale Yes  
Depth of field scale Yes  
Magnification 1:8  
Overall weight220 g (0.49 lb)  
Lens diameter 64 mm (2.50")  
Overall length 38 mm (1.50")  
Lens color Black  
Filter thread size 49 mm  
Filter annotations Does not rotate on focus  
Lens hood included No  
Lens hood code PH-SA49  
Tripod collar included No

Lens Includes

Pentax Normal SMCP-FA 50mm f/1.4 Autofocus Lens
49mm Front Lens Cap
Rear Lens Cap
1-Year Warranty



The lens I needed - and you might too!, October 25, 2009

By T. Piatek (Irkutsk, Russia)

I must say, stepping up to a DSLR from a point-and-shoot camera was one of the best decisions I've made regarding electronics; the picture quality is out of this world, and I can take shots in challenging lighting that allows me to get pictures of my ever-moving daughter that I never could dream of before. Typical P&S cameras take far too long from focusing to capturing to get the photo before my daughter's out-of-frame, but the Pentax DSLR does the trick. Trouble was, I still couldn't get perfect pictures in very dim, low-light environments, like a living room at night.

That all changed with this lens - for about $225 lightly used, I got an amazing value that's totally transformed my camera! Low light holds no fear, and I've taken pictures in dim lighting at speeds that don't allow subjects to blur! Furthermore, the lens quality is fantastic, and the bokeh it produces is gorgeous. This lens suits me for both portrait photography and low-light family photos, and it saved me from buying another DSLR with better high-ISO performance. I never go beyond ISO 400 now, and my photos are much better for it.

Pentax's new lens might be fine, but this one provided an amazing value and quality that will surely keep me enjoying my Pentax DSLR for years to come.

Pentax SMCP-FA 50mm f/1.4 Lens

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