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Wednesday, 20 May 2009

Comments

I'm dying to find a good vacation camera: small, light, good build, good-quality images. Part of me wants to invest in a Canon G10 but I know that a non-SLR won't satisfy my need to shoot at higher ISOs from time to time. Seeing the specs for the K-7 makes me want to revisit other Pentax models to see how they'd fit.

What do you think about the live view qualities of the k-7? Has it been improved compared to the k20?
Is it usable now? As a friend of mine said the k20d was only able to offer you about 20 seconds, then the body stopped the liveview mode. So you could not use the mode permanently.

This is my dream camera. It is tough and will fit in my bike packing set up. I've been wanting close to buying both a D300 or an E3 many times but could not come to term with the size. The K-7 appears to have the right feature set in the size I was looking for.

Besides, it will look different than all my friends shooting those big Nikon's and Canon's.

I have placed an order for one of these. July can't come soon enough.

Thank you Pentax. I can't wait.

AlexMonro wrote:
"Tom, I read in the specs on one of the preview sites that the K-7's sensor shift is limited to approx 1mm each way from centre. So, at about 4% of frame width (8% from one extreme to the other), it's probably not really enough for panoramic stitching."

Can somebody who knows more about the precision of that sensor-shift mechanism tell me if it would be possible to move the sensor by exactly half a pixel along each axis, thus creating two interlaced images that can be combined for more resolution? I imagine it would be impossible to exactly double the resolution because each sensor well averages intensity over an area, but it could yield some improvement over base resolution.

"Can somebody who knows more about the precision of that sensor-shift mechanism tell me if it would be possible to move the sensor by exactly half a pixel along each axis, thus creating two interlaced images that can be combined for more resolution?"

expiring_frog,
I'd like you to do me a favor. First, stop thinking about this for a full two weeks. Then, at the end of that time, never think of it again.

Mike
(With apologies to Wendell Webb)

You will be sending me the K-7 once you are done with your final review. Right?

@Mike: :D. All right, I'll stop.

But for background, I share an office with four people who do computational photography (i.e. the same bunch of people who created the focus-after-the-fact plenoptic camera you wrote about long ago). So I hear a lot of this sort of stuff.

Say the D700 had sensor-shift. In normal use, you get the excellent low-light performance. Put it on a tripod, give it double the exposure time (or double the ISO and keep the old exposure), and in that time the camera takes two shots separated by a half-pixel shift. Voila, there's your 24mp (or thereabouts) landscape camera with one stop less sensitivity. Assuming sensor-shift is already this precise, it saves over the cost of the D3X sensor, no?

Conceptually, you're using the camera like a scanning back. Here's the same idea applied to the temporal domain, i.e. to video, by the group mentioned above: http://graphics.stanford.edu/papers/highspeedarray/

The WP page has decent links:
http://en.wikipedia.org/wiki/Computational_photography

Like it or not, Mike, it's all coming to a camera near you :).

Ok, turns out Boeing, of all companies, holds the patent, issued last September.

http://www.patentstorm.us/patents/7420592.html

"You will be sending me the K-7 once you are done with your final review. Right?"

Brian,
Sure. Be waiting for the FedEx truck, okay?

Mike

"I share an office with four people who do computational photography (i.e. the same bunch of people who created the focus-after-the-fact plenoptic camera you wrote about long ago). So I hear a lot of this sort of stuff."

Really? That's very cool....

Mike

I am a blue collar worker in northern WI. So my last "new" camera was a Minolta X700. Then I bought used Canon Elans. Then a used Casio to "learn" digital. Then a used Canon D30. Then a used Pentax *ist DS. Now I've been waiting for Sony to upgrade the A700. BUT, if the IQ of this camera checks out, I'm buying this as soon as it's available. Are you listening Pentax; crank up the factory! I am going to sell all my old equipment. I'll even sell some of my wife's things (hope I don't get caught!)
Didn't Ctein comment once, about buying new equipment when it came out? Now that's enjoying life!

In finder digital preview = No. But a camera level indicator, and live view.

Custom lens calibration = Still there, 20 lenses worth.

Tilt/Swivel LCD = not needed. It has an HDMI out socket for your LCD TV, or, hopefully, an aftermarket battery powered HD LCD screen about 8" to 13" diagonal.

Hi Mike,

How's the SD card door? Does it open easily like the Nikon D80 (which I find a bit flimsy)?

Or is it, hopefully, sturdier and not too easy to open like the Canon 40D type of door?

Thanks!

A white paper/brochure on the K-7 has been posted by Pentax USA.

http://www.scribd.com/doc/15712448/K7-Brochure-Copy

100% viewfinder? Great stuff, and in an ideal world every SLR should have one.
In an ideal world every SLR should have a viewfinder where glasses wearers can see the whole screen at once. What is the K7 like?

It is rather more complicated to weather-seal a camera with tilt/swivel screens so I don't mind Pentax's choice...

Complicated to weatherseal an articulated viewscreen dslr? Maybe for Pentax it is. Was not difficult for Olympus with their E3 which sells at identical price point K-7 will launch at in July or some say August... No HD video on E-3 however most photographers say they can do without video so one should not overlook Olympus E3 for same money since they delivered articulated viewscreen in weatherproof body. E3 has image stabilized body too, just like Pentax. E3 has dual card slots, pentax has one card slot. Always best to shop around unless you're married to only one system.

The K-7 has no room for the tilt/swivel mecehanism to the external LCD - the camera is simply too smal for that. It needs space for the buttons also. Look at the competition, they have placed the buttons under and above the LCD because the LCD moving mechanism takes up so much space. Having an extra row of buttons underneath the LCD would make the K-7 taller than it is today, and I wouldn't welcome a bigger K-7.

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