A grip that holds peanuts would be very welcome!

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The P could stand for PENTAX or PENTAPRISM

Eventually dropping the name PENTAX and just using RICOH KP
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KP is too close to K-POP and would look very dull by comparison

https://www.youtube.com/watch?v=zYoYoBtLqOY#t=18

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Pentax SR isn't any use on long lenses so what it reports is of no use.

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The approx. 2 second delay (or mirror up) completely removes any vibrations due to the mirror from the problem with DSLR's. The mirror is also up in LV.

The blur can often clearly be seen with 10-12mm WA lenses. Falk must also think it's sufficiently visible on other focal lengths to take the bite off, because he's shown a tack sharp line on his graph.

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Often measured blur isn't noticeable in the results because it's too small to be seen by the naked eye.

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Extensive testing was done about shutter blur on the K-7 and a little bit on the later K-5. A lot of the problems were fixed with the K-5. See the top graph....

http://blog.falklumo.com/search/label/shake%20reduction

Stay clear of speeds between about 1/40th and 1/125th with a K-7 See exposure chart at bottom.

Using flash as the main source especially at about 1/2 power or less should miss all the blur, because the duration of the flash will be 1/1000th or less.

You can still get acceptable results with a K-5 + 500mm lens at 1/320th with Sigma SR on and tripod mounted. Pentax SR doesn't really do much at fast shutter speeds. It's made for 1/25th sec.

100% Crop 400ISO K-5 + Sigma 150-500mm at f/8 Auto-Focus


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Why else would Pentax have put it in the camera? I would however put the shake in this test down to an unstable lens/camera combination. It magnifies any shake however small caused by shutter vibration or even the wind or nearby sounds. A shutter speed of at least 1/500th sec would be needed with this setup.

You can actually see how unstable the system is by trying to MF using the viewfinder. It will be difficult due to how easy it is to cause the camera to shake.

Nearly all shots contain some blur caused by vibrations, even on mirrorless cameras. I haven't got a K-1 but imagine that it works similar to Nikons system. I haven't read all this link, partly because I only have a K-5...

http://nps.nikonimaging.com/technical_solutions/d810_tips/the_electronic_front/

Apart from problems with long lenses the other area that this type of vibration causes problems is with microscope mounted cameras...
http://www.krebsmicro.com/Canon_EFSC/

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Peter answered this in the first post...

" I was getting what I assume to be shutter induced shake. Trying the mirror lock-up made no difference. I then tried the electronic shutter feature in live view and it nailed it. This was repeatable time and time again."

No further explanation necessary.

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It's very difficult (almost impossible) to hold 300mm + TC steady even on a tripod.

I normally use SR ON with big lenses even with a tripod. You have to use the release on the camera by hand. SR switches off with IR enabled.

This is one area where in lens SR is better because it can be used easily on a tripod.

Try this test with a 50mm lens to see how it works out.
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