PIX 2015
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Compared to...

The Pentax K-x is one of the standout performers in its class, and offers excellent image quality over a wide range of ISO settings. It can't quite match the EOS 550D in terms of resolution though - you can see for yourself the differences between these two cameras on this page.

Studio scene comparison (JPEG)

This is our standard studio scene comparison shot taken from exactly the same tripod position. Lighting: daylight simulation, >98% CRI. Crops are 100%. Ambient temperature was approximately 22°C (~72°F).

Canon EOS 550D vs. Pentax K-x

Camera settings:

  • Canon EOS 550D: Canon EF 50 mm F1.4 lens, Aperture Priority, ISO 100
    JPEG Large/Fine, Manual WB, Default Parameters (Standard), Self-Timer, ALO off

  • Pentax K-x: Pentax FA 50 mm F1.4 lens, Aperture Priority, ISO 100
    JPEG Large/Best, Manual WB, Default Parameters (Bright) Self-Timer
Canon EOS 550D
Pentax K-x
4.1 MB JPEG (3872 x 2592)
3MB JPEG (3872 x 2592)

Although it might sound like a rather obvious point, the main difference between default JPEG output from the EOS 550D and Pentax K-x is that the 550D's files are larger. There is very little difference in actual detail resolution, although the slightly more aggressive sharpening being applied by the 550D makes detail a little more obvious. Closer examination reveals that the K-x can resolve almost as much of the finest detail in this scene, but it is slightly masked by the fractionally softer default output.

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Total comments: 4
Bennie 01

Is the Canon EF 100-400 mm Mark 11 lens adaptable to a EOS 550 D.
Will the lens do good on it? What is the current price tag in the USA?


Seriously Pentax has around 2% of market share :O The K-X and K-7 are really good cameras for there categories and price etc... Given that they have only 2% market share should I be scared to buy a camera from them? Could they just say one day right we will no longer make cameras and that's it? To add to that question what other lens do mount on Pentax?

1 upvote

Any reason you thought posting your questions on a completely unrelated Canon T2i review would get answered? Accident?

All of Pentax's k mount lenses work on all Pentax dslrs.

1 upvote

The camera was ok, but as soon as I dial in my personal settings, problem is still there!! aarrrgg!

I just sent them the camera back to Canon, waiting for explanations.

1 upvote
Total comments: 4