K-r firmware update


Pikaholic

Link Posted 10/04/2014 - 16:53
My K-r has just come back from the Pentax Lab. and they kindly installed the latest firmware update (1.15) for me. I find now the normal ISO range is 400-12800 and the extended range is 200-25600. Does anyone know the reason for this change? It seems a backward step to me to clip the bottom setting and leave the top setting, which is not much use anyway. Is the camera as good now at 400 ISO as it was before at 200?
Old hand, slow fingers.

sbrads

Link Posted 10/04/2014 - 18:54
Has the K-r got highlight correction and is it enabled? That would bump up the minimum ISO.

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McGregNi

Link Posted 10/04/2014 - 19:16
Pikaholic wrote:
... Is the camera as good now at 400 ISO as it was before at 200?

ISO 400 is twice as sensitive to light as 200, so no, in the context of what I understand your question to be. You don't want to limit yourself to ISO 4OO just because a camera setting is preventing it going lower, you only want to set the higher ISO's when you have a particular need for it.

Apart from the highlight correction as already mentioned, the only thing I can think of (& I have a K7, so not sure if it applies the same way) is the 'Program Line' limits, which are set from the Info screen (press info when in shooting mode). Here I choose 2 things which affect the exposure settings when in 'P'mode - 1)ISO lower & upper limits & 2) Fast / Slow / MTF which affects the choice of aperture.

So have a look at these 'program line' iso settings - highlight the option on the info screen and use the e dial to lower the 400 to 100 (say). Having said all this, this setting should not prevent the ISO being manually lowered, so try this and let us know if you can do it. But it will cause it to default back to a minimum of 400 each time you switch on or off, or leave it for a while without taking a shot.
My Guides to the Pentax Digital Camera Flash Lighting System : Download here from the PentaxForums Homepage Article .... link
Pentax K7 with BG-4 Grip / Samyang 14mm f2.8 ED AS IF UMC / DA18-55mm f3.5-5.6 AL WR / SMC A28mm f2.8 / D FA 28-105mm / SMC F35-70 f3.5-4.5 / SMC A50mm f1.7 / Tamron AF70-300mm f4-5.6 Di LD macro / SMC M75-150mm f4.0 / Tamron Adaptall (CT-135) 135mm f2.8 / Asahi Takumar-A 2X tele-converter / Pentax AF-540FGZ (I & II) Flashes / Cactus RF60/X Flashes & V6/V6II Transceiver

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Pikaholic

Link Posted 10/04/2014 - 20:09
Thanks Chaps. Yes, the highlight correction was on and Yes, turning off has restored the lower ISO settings. I learn something every day.

I haven't found a setting for the Program Line limits. The K-r is more basic than the K7 and so does not appears to have this refinement. I am more than happy with what the K-r provides and probably wouldn't use this facility if it was available.

Thanks again to you both for your help.

Kind regards, Bob
Old hand, slow fingers.

McGregNi

Link Posted 10/04/2014 - 20:13
OK, sorry if it was superfluous. Glad you've sorted it out.
My Guides to the Pentax Digital Camera Flash Lighting System : Download here from the PentaxForums Homepage Article .... link
Pentax K7 with BG-4 Grip / Samyang 14mm f2.8 ED AS IF UMC / DA18-55mm f3.5-5.6 AL WR / SMC A28mm f2.8 / D FA 28-105mm / SMC F35-70 f3.5-4.5 / SMC A50mm f1.7 / Tamron AF70-300mm f4-5.6 Di LD macro / SMC M75-150mm f4.0 / Tamron Adaptall (CT-135) 135mm f2.8 / Asahi Takumar-A 2X tele-converter / Pentax AF-540FGZ (I & II) Flashes / Cactus RF60/X Flashes & V6/V6II Transceiver

McGregNi

Link Posted 10/04/2014 - 20:53
This is really for general discussion for those who have the models with the Program Line (or you Bob if you upgrade!), but the thing about Program Line is you can't 'turn it off' ... its always there, and there's a risk you might not know.

I didn't really realise it at first, but there's always one of the Program Line options active, and it tells the camera what to prioritise when choosing P auto settings. So, if we use P, then it really makes sense to take control of this function, or we're letting the camera do things that may not be ideal for our subjects.

The choice is really whether to prioritise higher shutter speeds / smaller apertures for more depth of field / or to use the embedded MTF data in a DA lens to try and use the 'optimum' aperture of that lens for image quality. The choice is ours!

Of course, if using any of the other autoexposure modes then it is superfluous, but there are many times when P is the easy one to go for, and it may be helpful to have the camera set up ready for the best 'program line' in that case.
My Guides to the Pentax Digital Camera Flash Lighting System : Download here from the PentaxForums Homepage Article .... link
Pentax K7 with BG-4 Grip / Samyang 14mm f2.8 ED AS IF UMC / DA18-55mm f3.5-5.6 AL WR / SMC A28mm f2.8 / D FA 28-105mm / SMC F35-70 f3.5-4.5 / SMC A50mm f1.7 / Tamron AF70-300mm f4-5.6 Di LD macro / SMC M75-150mm f4.0 / Tamron Adaptall (CT-135) 135mm f2.8 / Asahi Takumar-A 2X tele-converter / Pentax AF-540FGZ (I & II) Flashes / Cactus RF60/X Flashes & V6/V6II Transceiver

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