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Forum: Travel, Events, and Groups 20 Hours Ago  
Kiwi Pentaxians
Posted By Class A
Replies: 17,453
Views: 1,269,787
The K-3 III is capable of tracking eyes. See the video below.

I suspect the face has to be relatively large in the frame for this to work. If the face becomes too small for eyes to be recognisable, the K-3 III can still track faces, though.

The reason why the K-3 III can do this while the mirror is down is because it does not use the main sensor for eye-tracking, it uses the metering chip which has a higher resolution than any metering chip used in any Pentax DSRL before (~307,000 pixels).

Video AF will be CDAF AF, though, so it won't come close to the on-sensor PDAF performance that most mirrorless cameras use.
















You Tube



Forum: Pentax K-3 III 3 Days Ago  
DPReview first impressions Pentax K-3 III
Posted By Class A
Replies: 91
Views: 7,528
Yes, but...


... is not correct.

Magnification and AOV are two different parameters. They are only coupled, if you fix the output size.

The 50mm focal length is not special because it matches the AOV but because it is an approximation of the 43.27mm focal length that gives one exactly a normal perspective when viewing an image at a distance that is the same as the image diagonal. BTW, if the convention were to look at images at half the distance of the image diagonal, one would have to use 21.63mm to record the respective normal perspective.

A "normal perspective" neither exaggerates or lessen the angles in a scene (wide angles exaggerate angles, long focal lengths lessen them).


I'm not sure that "isn't really good" characterises what they wrote but it is true that in the D500 review conclusion the viewfinder is referred to as "the large viewfinder" while the K-3 III's viewfinder is labelled "small". I guess the justification might be that in 2016 the EVF competition was different than it is in 2021?


Viewfinder magnification is defined that way and it makes sense, since it relates to how a user perceives the viewfinder image compared to the real scene.

BTW, when DPReview quote the FF-equivalent magnification they are doing it to give a sense of the effective size of the viewfinder frame. Even a slightly enlarged APS-C image will still be smaller than an FF image at 1:1 magnification.
Forum: Pentax DSLR Discussion 4 Days Ago  
Will you buy the k3 Mark 3?
Posted By Class A
Replies: 262
Views: 7,995
It is not a lie, though. For some definition of "better" (e.g., relating to image quality), FF is objectively better.

There are still some reasons why someone may prefer a particular APS-C camera over a particular FF camera, but there is no denying that larger formats have some advantages.
Forum: Travel, Events, and Groups 4 Days Ago  
Kiwi Pentaxians
Posted By Class A
Replies: 17,453
Views: 1,269,787
Amazing!

Thanks for sharing the image!
Forum: Travel, Events, and Groups 5 Days Ago  
Kiwi Pentaxians
Posted By Class A
Replies: 17,453
Views: 1,269,787
Let me know if you go on a hike again. Would love to join sometime.

BTW, I fixed a potentially ambiguous reply to one of your earlier posts. The idea was to agree with you and I'm not sure that came through with the first version I wrote.
Forum: Digital Processing, Software, and Printing 5 Days Ago  
What to expect from K3 iii and various processing programs?
Posted By Class A
Replies: 17
Views: 1,031
It isn't.

The camera just contains internal memory which stores the DCU 5 software so that you can download it from the camera and install it on your PC/Mac.

Regarding DNG and JPEG files, any software that processes these formats will be able to deal with K-3 III files.

Only if you use PEF files from the K-3 III, you'll have to wait for new software versions to support them.
Forum: Pentax K-1 & K-1 II 5 Days Ago  
APS-C lenses and K-1 Crop mode 1:1
Posted By Class A
Replies: 10
Views: 552
The good news is that given their APS-C image circle covers the long side of the image (~24mm) and a 1:1 FF crop does not require more than 24mm in neither the vertical (naturally) nor the horizontal (due to the crop) direction, a large proportion of the 1:1 crop will be fine. Indeed, edge performance will be as good as on APS-C.

The bad news is that the corners of such a 1:1 crop are further out (~34mm) than what the APS-C image circle has been designed for. So the corners of the 1:1 crop may be anything from unusable to completely fine, depending on the lens. It's the last 30% of the diagonals into the corners that one should check for when testing lenses; no need to check the edges outside the corners.

FWIW, vignetting is only one symptom one should look out for. Optical performance can become quite weak before vignetting becomes significant.
Forum: Pentax K-3 III 5 Days Ago  
DPReview first impressions Pentax K-3 III
Posted By Class A
Replies: 91
Views: 7,528
As I wrote earlier, I agree that the comment is an endorsement of the potential of the K-3 III.

We are in agreement that in that regard the comment is a positive one.

However, the invocation of a "death of the DSLR" theme is unwarranted. It is a narrative that has no place in a preview like that, unless there were hard proof and it would be adequate to warn potential customers that they'd be investing into a dying species. This aspect of the comment is relevant, i.e., I don't think I'm "overthinking" this, because you cannot tell your readers that a product category is obsolete and at the same time claim you are neutral or even positive regarding a recommendation of a product in that category. If it were true that the K-3 III could be a last hurrah, how advisable would it be to buy one (except for a small group)?

I accept that the author may be convinced that DSLRs are done for -- but intentionally or not, he is painting the K-3 III into an obsoleteness corner. If it was not intentional and the comment was purely meant to be a positive one, as you suggest, then the comment is yet another example of the lack of care that is often found in their Pentax pieces (to which they admitted, BTW).
Forum: Pentax K-3 III 5 Days Ago  
DPReview first impressions Pentax K-3 III
Posted By Class A
Replies: 91
Views: 7,528
That's how I read it as well.

The point is that the implication that the K-3 III might be the last great DSLR or, more generally, that it would be adequate to expect that last DSLR ever to be released any time soon, is just unwarranted and implies the notion that "DSLRs should no longer be considered as a long-term alternative". Unless he has first hand information from Canon, Nikon, and Ricoh to that effect, he should not be invoking the idea that none of them have long-term plans for DSLR production.
Forum: Pentax K-3 III 5 Days Ago  
DPReview first impressions Pentax K-3 III
Posted By Class A
Replies: 91
Views: 7,528
Sorry, not sure what you mean?
Forum: Pentax News and Rumors 5 Days Ago  
K-3 III To Be Released Next Week
Posted By Class A
Replies: 422
Views: 31,418
That, and an improved API (behaviour) if possible, would be very much welcome!
Forum: Pentax K-3 III 5 Days Ago  
DPReview first impressions Pentax K-3 III
Posted By Class A
Replies: 91
Views: 7,528
This can definitely be observed in the way the weight and size of the K-1 II was referred to compared to the terms used for the Nikon D850:

D850K-1 II"big, heavy camera" "as heavy" as a tank"a bit heavy" "hulking mass of a camera""little unwieldy" "Camera is large and intimidating""not a petite camera" "Large and obtrusive..."

The K-1 II weighs 5g more (1010g vs 1005 g, both including battery).
In terms of size, if anything the D850 could be considered to have a larger profile.



It seems the extra 5g make all the difference! :)

BTW, the Panasonic S1R was described as "hefty" and "The payoff is a camera that feels a lot more like a pro camera body than any of its immediate peers."

P.S.: I don't know why cameradecision have the Nikon D850 at 1015g. I found 1005g elsewhere.
Forum: Pentax K-3 III 5 Days Ago  
DPReview first impressions Pentax K-3 III
Posted By Class A
Replies: 91
Views: 7,528
It's definitely an uninformative way of talking about the camera.

I think the potential negative undertone is too subtle to warrant challenging it, but I see no problem with asking a question about what he meant with "doesn't diverge too much". If there is anything worth saying then it should be said in a manner that helps the reader understand whether they like the change or not.


Well, the simple answer is "yes".

In every recent Pentax camera review, they never failed to opine that there is not enough to attract users from other brands.

That's their prerogative, I guess, but it seems premature to already put this sentiment into a what is essentially a preview article only. They have not properly tested the features and IQ yet, however already somehow know that K-3 III is only of interest for existing Pentax owners. That does not seem to be living up to the highest standards of journalism.

This idea of "for Pentaxians only" is in the same category as the unwarranted assumption that the K-3 III might be the "last great DSLR". How do they know and why make such presumptions?
Forum: Pentax K-3 III 5 Days Ago  
DPReview first impressions Pentax K-3 III
Posted By Class A
Replies: 91
Views: 7,528
Very well put and I 100% agree.
Forum: Pentax DSLR Discussion 6 Days Ago  
Will you buy the k3 Mark 3?
Posted By Class A
Replies: 262
Views: 7,995
But wait, Richard Butler's crystal ball tells him that the end is nigh: In the K-3 III initial review he writes "Maybe we've not yet seen the last great DSLR, after all.".

So lock your doors, hide your lenses, and guard your DSLRs. It's all going to be over!
Forum: Pentax K-3 III 6 Days Ago  
DPReview first impressions Pentax K-3 III
Posted By Class A
Replies: 91
Views: 7,528
He probably implies upgrading from another Pentax APS-C DSLR.

His closing thought also implies that he sees no potential of anyone else but already existing Pentax owners being interested. Why put such an assumption into an initial review? Likewise invoking the notion of a "last great DSLR" reveals that he sees no future for DSLRs.

Well, I guess being pessimistic about the role of DSRLs in the future and expressing that view in articles as an editor is one way of helping one's idea of the future to become the future. My preference would be for an editor to abstain from commenting on the matter in product reviews. Whether they have enough information about how DSLR sales numbers will end up to warrant an (unneeded) "opinion piece" on the future of camera technology, I don't know, but that would be the place to express one's sentiments, not in an initial review.
Forum: Pentax K-3 III 6 Days Ago  
DPReview first impressions Pentax K-3 III
Posted By Class A
Replies: 91
Views: 7,528
I didn't spot any snarky comments at all.

He is, however, not exuding much excitement.

To comment on the impressive achievement of the new 1.05x magnification viewfinder as
"That's small by the standards of many mirrorless cameras..." (emphasis is mine)
  • might not be accurate (in another piece Carey Rose writes "...though there are a few mirrorless APS-C models that have larger equivalent magnifications for their electronic viewfinders." (emphasis is mine)). I don't know who is right because I don't care about cameras with EVFs. They certainly should agree on one of these versions.

  • is unnecessarily using an absolute ("small") rather than a relative ("smaller") characterisation. Is he going to refer to regular-sized FF viewfinders as "small" from now on?

  • is not acknowledging the engineering feat that the new OVF in the K-3 III required.

Yes, if OVF vs EVF is a matter of tomato-tomato to you, I can see how one might be nonplussed by the K-3 III's OVF. However, if you understand that EVFs are a no-no for some photographers, you celebrate the arrival of a new gorgeous viewfinder and applaud the fact that a company is brave enough to make an investment into a technology that many are trying to write off as "obsolete".

In a similar vein, IMHO, it would have been adequate to highlight the fact that the K-3 III supports face-AF and eye-AF outside LiveView. Only a handful of DSLR models pull this trick off and I believe anyone with a true appreciation for DSLRs would have pointed out how unusual this is.

Again, it is just a "yawn" if one has no problems with staring into a mini-TV while making images, but for anyone who highly values an OVF experience, what Pentax have done here is very noteworthy. Instead the feature is pretty much mentioned in passing only. If it was always part of the article, I missed it the first time around which could be owed to me being overtired at the time but the presentation surely did nothing to make sure I don't miss such a remarkable feature.

I could continue nitpicking about a number of further issues, but I don't see the return on investment. :)

I hope Carey Rose will do the K-3 III review, if they receive a sample (they never reviewed the HD D-FA* 85/1.4, even though it is sold on Amazon). If their "science editor" gets involved, it will be the death for any favourable review.
Forum: Pentax News and Rumors 04-02-2021, 04:54 PM  
K-3 III To Be Released Next Week
Posted By Class A
Replies: 422
Views: 31,418
There is no difference. With "post facto denoising" I referred to the approach (practised by Pentax) of reducing noise through post-capture image processing. This kind of image processing can be done at any point in time, in-camera or in post-processing on a computer.


I use the following definitions (perhaps debatable but definitely useful):
"noise reduction" = reduction of sensor-induced noise using in-sensor technology (e.g., dark current suppression). These techniques address shortcomings of the light capturing process and never have detrimental effects on image data integrity (due to the fact that interfering sources are attenuated, subtracted, etc.; they cannot be confused with the signal/data).

"denoising" = image processing technique for removing noise from images (e.g., by smoothing high spatial frequencies). This approach does not have access to additional information at the time of capture and will result in some loss of data integrity (some information will be lost, due to the fact that signal/data and any interferences one wishes to remove are now inextricably combined). Subjective evaluation may attest "better image quality" since the image does not look as noisy anymore, but inevitable some information will have to be sacrificed (hence Pentax's comments on the need for caution when using this approach).

It would be reasonable to use "noise reduction" as a general term and regard "denoising" as a special case of "noise reduction" but then I don't know what term I'd use for the in-sensor "noise reduction".


Modern sensor technology is so good that there is hardly any noise added to the data (data = photon count received by the sensor). The order of magnitude is a couple of individual electrons per pixel.

The overwhelming noise one sees in a high-ISO image is part of the data. Illumination is a stochastic process -- individual quanta (photons) randomly hit a scene -- and in very low light levels, its random nature is revealed. The random nature of illumination means that recorded intensities will fluctuate. Some pixels receive more photons than others but not because there is an actual brightness difference, but because they randomly received more photons. When the number of photons is large (i.e., light levels are higher) then two pixels recording the same brightness will statistically receive a very similar amount of photons. When the number of photons is small (i.e., light levels are low) then one pixel may receive zero photons and the other pixel two photons, even though they both should have received one photon each.

So, in summary, the salt & pepper look of high-ISO images is correctly capturing reality; that's how the scene looks like when only a very limited number of photons are around. In other words, there is "scene noise" which is part of the data.

What "denoising" does is attempting to make the image of the scene look better than the scene looked. Granted, "denoising" will also address the very low residual sensor-contributed noise, but due to the proportion between "sensor-induced noise" and "scene noise", "denoising" mainly combats "scene noise".

As you can imagine, leaving the data intact, i.e., refrain from "denoising" can have advantages, e.g., by stacking multiple noisy image one can get a clean image since one is essentially simulating a longer exposure time, which in turn means more photons are being used, which in turn increases the signal to noise ratio. If you stack denoised images, you no longer get this simulation effect, as you are now working on data that no longer represents the photons during capture. Another advantage of preserving intact data is that future image processing may do an even better job than the "accelerator unit (II)" of reconstructing a nice looking scene from noisy (here, "noisy" = "incomplete") data.

I hope this helps to better appreciate my perspective.
Forum: Pentax News and Rumors 04-02-2021, 01:10 PM  
Members of the Ricoh Imaging - Pentax Design Team
Posted By Class A
Replies: 10
Views: 1,224
It is truly impressive to witness the dedication of these engineers and to realise how many parts were newly developed, as opposed to taking them from a parts bin and trying to make the overall design work around these generic parts.
Forum: Pentax News and Rumors 04-02-2021, 11:41 AM  
K-3 III To Be Released Next Week
Posted By Class A
Replies: 422
Views: 31,418
There is still the on-demand Bayer-AA filter, astrotracer option, great ergonomics, weather-sealing, unique shooting modes, the green button, etc., so there are a few more reasons why someone might fancy a Pentax DSLR, but in general, yes, anyone able to tolerate an EFV can find a lot of things to like elsewhere as well (particular as far as video is concerned) .
Forum: Pentax News and Rumors 04-02-2021, 11:37 AM  
K-3 III To Be Released Next Week
Posted By Class A
Replies: 422
Views: 31,418
I used the Panasonic S1R EVF in 120Hz mode. Still awful.
Forum: Pentax News and Rumors 04-02-2021, 11:33 AM  
K-3 III To Be Released Next Week
Posted By Class A
Replies: 422
Views: 31,418
There is nothing that can be done about any processing the Sony may perform already (having said that, there is absolutely no evidence supporting the idea that Sony sensors do anything to artificially improve perceived IQ; they employ hardware-level noise reduction but this is completely distinct from post facto denoising.). Pentax does not have the means to develop their own sensors so any discussion about what the Sony sensors already do is moot (and again, any suggestion that they do anything that would affect data integrity is baseless speculation.)

In contrast, there is a choice of what is done with the Sony data before it is written to a RAW file.

Obviously, Pentax would not purposefully degrade the image quality but there are judgements to be made how invasive denoising should be, because some people may would like to apply different judgements. Pentax themselves say:
"We believe that noise contains some photographic data that is better left untouched. ... In other words, excessive noise processing may sometimes eliminate some data that is essential to photography."
So Pentax recognise that too much denoising can be harmful. What is too much and what isn't depends on the user and the application. Hence, it would be best if the choice were available to the user, including accepting the choices Pentax propose.
Forum: Pentax News and Rumors 04-02-2021, 11:21 AM  
K-3 III To Be Released Next Week
Posted By Class A
Replies: 422
Views: 31,418
Thanks for naming the R6, I didn't know about this one.


Which does not make the practice one bit better.

One can just hope that DPReview keeps in mind how commonplace the practice has become when reviewing the K-3 III instead of throwing another unwarranted fit.
Forum: Pentax K-3 III 04-02-2021, 09:26 AM  
K-3 III Article Collection
Posted By Class A
Replies: 21
Views: 3,729
I have added a link to the "Challengers - Messages from the development team members" page which provides further very interesting background information on the K-3 III and its development.
Forum: Pentax News and Rumors 04-02-2021, 08:03 AM  
K-3 III To Be Released Next Week
Posted By Class A
Replies: 422
Views: 31,418
My experience (with other Fuji and Panasonic EVFs) as well.

For some reason (...) one does not read about this in "reviews".
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