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07-10-2010, 04:11 PM   #1
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kx for landscape

I am thinking about getting a kx for doing landscape work,
would be using the DA 15mm, 21mm, maybe either the FA35mm or the FA 31mm if I can find one, and also the FA 41mm limited lenses.

Yeah I know the K7 is a better camera all around, but I wanted something really small, and one with the best DR range, According to the DXO site, the kx has almost +2 ev over the K7, I assume even at base ISO.

Is this true??

I will always be shooting at base ISO, at f5.6-f8

Any thoughts and are there any websites besides imaging resource where you can compare base ISO images?

Thanks
Steven

07-10-2010, 08:08 PM   #2
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At base isos you will be better off with k7. K7 has little bit of extra resolution. Which is pretty useful. About DR i do not think it would be an issue in the end. (but someone else might put some better light to it).
07-11-2010, 05:13 PM   #3
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QuoteOriginally posted by kuau Quote
are there any websites besides imaging resource where you can compare base ISO images?

Thanks
Steven
Flickr is a great resource for this sort of thing. Here's a search for 'Pentax K-x, iso 200'

pentax K-x 200 iso - Flickr: Search
07-11-2010, 08:20 PM   #4
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Yeah the Kx has a million miles better DR. The Kx is only outperformed in this regard by the D3x and some medium format cameras!

07-12-2010, 07:19 AM   #5
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I wonder if the KX also has a weaker AA filter
07-12-2010, 11:01 PM   #6
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The K7 isn't quite as small as the K-x but it's far and away the smallest camera in its class, noticeably more petite than the K20D, which, itself, is smaller than either the Canon or Nikon equivalent.

The true base ISO for the K-x seems to be 200. There is a 100 setting but images are not as nice at that setting. The K7 has a true 100 ISO setting. That's probably one of the reasons for the K-x's extra ISO room at the top. For landscapes, where you'll be shooting with a tripod that won't be an issue. Another big plus for the K7 is the in-focus spot light. The K-x doesn't have one. Don't forget the weather seals on the K7, too. In wet or dusty environments, that's a plus. One more plus for the K7 are the external controls lacking on the K-x.
07-13-2010, 09:13 PM   #7
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QuoteOriginally posted by mysticcowboy Quote
For landscapes, where you'll be shooting with a tripod that won't be an issue.

..........

. One more plus for the K7 are the external controls lacking on the K-x.
I disagree about the lack of external control part. The reason while you take time to set on tripod, you really do not say that pushing two more buttons is more hassle.

Tripod set up itself is good amount of hassle i think.

For some people it is mere a point of habit , but hardly a big thing.
07-13-2010, 10:25 PM   #8
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What is an issue for the K-x on a tripod is that there's no way to either do a delayed shutter release, or a remote shutter release, for bracketted images. That makes HDR harder than what it should be.

07-13-2010, 10:41 PM   #9
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I'm not so sure that the extra DR on the KX is going to be that much of an advantage in landscape work, as nice as it looks on a spec sheet.
Pretty much everything I do seems to fit into a 7 or so stop range, which is well within what the K7 can do.
07-14-2010, 08:31 AM   #10
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Aside from DR, I presume in landscape shooting, image resolution is also another important consideration. Interestingly, despite the 20% megapixel difference between the K-x and K-7 (12MP vs 14MP), all the review sites show the K-x has practically the same resolution as the K-7.

Eg dp review shows the K-x as having:
Measurement Absolute Extinction
Horizontal LPH 2200 * 2650
Vertical LPH 2200 * 2650

and the K-7 having:
Measurement Absolute Extinction
Horizontal LPH 2300 * 2700
Vertical LPH 2250 * 2650

One review site (photoreview.com.au) even has some Imatest charts showing the K-x exceeding the resolution of the K-7 in RAW at base ISO.
07-14-2010, 07:52 PM   #11
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I love the K-x, but at low ISO, to squeeze out every sharpened little pixel, I'll take my K20d over it.

However, if size matters, then the K-x will do just fine. I'm fond of the DA70 for landscapes as well as the lenses you mentioned. It is amazingly sharp.
07-17-2010, 02:43 AM   #12
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QuoteOriginally posted by twitch Quote
What is an issue for the K-x on a tripod is that there's no way to either do a delayed shutter release, or a remote shutter release, for bracketted images. That makes HDR harder than what it should be.
I'm pretty sure that the timer will delay by 2 seconds
07-17-2010, 11:37 AM   #13
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QuoteOriginally posted by Aussieflicker Quote
I'm pretty sure that the timer will delay by 2 seconds
There's a 2 and 12 second timer, as well as a 3 second remote timer. However, the camera will not auto bracket in either mode. This means manual bracketing, which means touching the camera, defeating the purpose of the timer in the first place.
07-17-2010, 05:31 PM   #14
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bugger - can you get a remote which works through the hot shoe?
07-17-2010, 06:03 PM   #15
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K-7 for base ISO's. Although if you're shooting only landscape, why not save on the body and get a K20D or K10D?
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