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02-20-2016, 08:41 AM   #661
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QuoteOriginally posted by Nicolas06 Quote
I'am scared to go over iso 800 on APSC but I reckon this would be over iso 1600 on FF. Meaning this would not change much most of the time as the deph of field would also be different.

And I'am really scared on APSC of iso 3200 and up. Theses tend to give not so satisfying results.

This is just that iso 1600 on APSC pictures are not very detailled, without that much nice colors and struggle already at a full screen preview (full HD). I also reckon that not all X isos shoots are equals, Good light high speed shot do lot better and you gain easily 1EV and a good lighting system also greating improve the results you get at a given iso settings.

Apologies if this has been covered earlier.

I don't see an extended ISO option mentioned anywhere but I see that the ISO specs say (my emphasis):

"Sensitivity
(Standard output) ISO AUTO/100 to 204800 (EV steps can be set to 1EV, 1/2EV or 1/3EV)"

Does this mean that there is the possibility of extended ISO (both higher and lower) as a firmware upgrade?


Last edited by Dieseler; 02-20-2016 at 08:43 AM. Reason: too many mentions!
02-20-2016, 09:29 AM   #662
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QuoteOriginally posted by Dieseler Quote
Apologies if this has been covered earlier.


Does this mean that there is the possibility of extended ISO (both higher and lower) as a firmware upgrade?
Software lower ISO is not interesting at all. It's the same ISO in reality as base ISO100.
02-20-2016, 09:32 AM   #663
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There was a clarification from Adam recently in one of the threads.
Pentax no more mentions it as extended ISO in their specs.
02-20-2016, 01:36 PM   #664
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QuoteOriginally posted by Dieseler Quote
Does this mean that there is the possibility of extended ISO (both higher and lower) as a firmware upgrade?
Pentax don't do extended ISO ranges. They just list the whole ISO range of the camera straight-up.

But note that Pentax pixel-shift tech doesn't just boost resolution, it also boosts dynamic range and reduces noise. Hence achieving what one might obtain from lower ISO. So a ISO 100 pixel-shift shot might work out, effectively, to be an ISO 50 shot ...

02-20-2016, 01:54 PM   #665
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Plus P-S eliminates chromatic aberrations
02-20-2016, 02:36 PM   #666
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QuoteOriginally posted by Zygonyx Quote
Plus P-S eliminates chromatic aberrations
No, it doesn't. It eliminates color artifacts from the bayer filter, not color artifacts caused by the lens.
02-20-2016, 03:02 PM   #667
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OK, do you know examples where this (true CA) could be seen, on Imaging Ressources samples i only can find the first ones.
02-20-2016, 03:36 PM   #668
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IR used high quality lenses in their test, but I found a little CA anyway. Look at the corners of this test photo taken with K-3II in pixel shift mode. There is clearly some CA. I cant find the same test chart tested with the same camera without pixel shift, but from the other test charts it looks about the same amount.

The sensor and camera dont have any way of distinguishing between color fringing caused by CA in the lens and color fringes present on the subject itself.

Pixel shift mode only takes away color artefacts casused by the bayer pattern, like color moiré.

02-20-2016, 04:33 PM   #669
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QuoteOriginally posted by WPRESTO Quote
Thank you Ricoh-Pentax for giving me an excuse to squander my children's inheritance on something I do not need at all.
Well, most importantly, when handing over those one kilo of glass 24-70 and 15-30s from your deathbed, don't drop them!

A+
02-20-2016, 04:54 PM   #670
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Can someone explain why there are so many complaints about the megapixel count? I do not understand why it is a problem at all since one can choose in the menus to shoot smaller size files if they desire. It is better to have the megapixels than to not have them, as some people crop heavily and/or print very large and truly need them.
02-20-2016, 06:59 PM   #671
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QuoteOriginally posted by Dieseler Quote
Does this mean that there is the possibility of extended ISO (both higher and lower) as a firmware upgrade?
Unfortunately I don't see it anywhere in the Custom function menu, So if Pentax doesn't have it listed there there is a zero possibility of it being added in later.

QuoteOriginally posted by ogl Quote
Software lower ISO is not interesting at all. It's the same ISO in reality as base ISO100.
Software ISO is a contentious issue, but Canon and Leica cameras make use of it with considerable success so I wouldn't write it off so quickly. Keep in mind the lower the ISO range can go, the more effective the flash sync will be at overpowering ambient daylight. Since no current DSLR can sync natively at speeds greater than 1/500th.

QuoteOriginally posted by rawr Quote
Pentax don't do extended ISO ranges.
Really?

02-20-2016, 07:07 PM   #672
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They are waiting for the DXOMark score using the standard range first , if it doesn't get into the top 3 then they'll enable 80, 50, 36, the latter 2 with pixelshift enabled by default
02-20-2016, 07:16 PM   #673
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QuoteOriginally posted by Digitalis Quote
Really?
OK. I should have said 'currently'.
That option isn't there in the K-3, K-S2, nor the 645Z (as you probably are aware).
02-20-2016, 09:29 PM   #674
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QuoteOriginally posted by Dieseler Quote
Apologies if this has been covered earlier.

I don't see an extended ISO option mentioned anywhere but I see that the ISO specs say (my emphasis):

"Sensitivity
(Standard output) ISO AUTO/100 to 204800 (EV steps can be set to 1EV, 1/2EV or 1/3EV)"

Does this mean that there is the possibility of extended ISO (both higher and lower) as a firmware upgrade?
They might mean that ISO range may change in some circumstances.
FI if you enable "highlight correction" ISO 100 will not be available, and in video and auto mode the full range on ISO may not be used.

Last edited by Fogel70; 02-20-2016 at 09:36 PM.
02-21-2016, 12:31 AM   #675
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QuoteOriginally posted by Digitalis Quote
Unfortunately I don't see it anywhere in the Custom function menu, So if Pentax doesn't have it listed there there is a zero possibility of it being added in later.




QuoteOriginally posted by Fogel70 Quote
They might mean that ISO range may change in some circumstances.
FI if you enable "highlight correction" ISO 100 will not be available, and in video and auto mode the full range on ISO may not be used.
OK, got it.

Thanks everyone.
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