MarBa

Joined on Jul 17, 2014

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Total: 49, showing: 1 – 20
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On article Pentax K-3 Mark III added to studio test scene (385 comments in total)
In reply to:

Toms cat: Reading most of the user comments seem to indicate that the DPR studio test of the K-3 mk111 camera body had the AA feature active during the test as no mention of it is in the EXIF data or the intro of the test (that I can see) .I guess Pentax users would likely be aware of how this would effect the poor detail on this studio test so we can be a bit more upbeat as to the future .We should move on and not get bogged down on the results , with all of the tensions and head scratching . DPR please inform us or re-shoot the test scene with AA filter off and tell us that in the intro . thanks

It was clearly stated in this discussion that AA was off. See below. AA is NOT the reason of this!

Link | Posted on Jun 3, 2021 at 06:56 UTC
On article Pentax K-3 Mark III added to studio test scene (385 comments in total)
In reply to:

Desmodronic: Can you do all us K-3iii owners a favour and tell us what tripod and head you were using please? :)
Many Thanks

I used 3-way head on Manfrotto 055 tripod, 20 year old. No signs of any shutter shock in my test with three different lenses and times from 0.4s to 1/640. Please look up my two posts with the images.

Link | Posted on Jun 2, 2021 at 21:47 UTC
On article Pentax K-3 Mark III added to studio test scene (385 comments in total)
In reply to:

Class A: @DPReview
Food for thought:
https://www.dpreview.com/forums/thread/4578799

Someone cannot replicate the issue you report, and yes, they use a variety of shutter speeds. Is a critical shutter speed range missing from their tests?

I tested 3 lenses at their best aperture (DFA 35 macro, FA50/1.4 and DFA 100 macro). I see no difference what so ever that correlates with variation in shutter speeds. I don't think that all three of my lenses are decentered and soft etc. And I did look at the images in LR at 400% and yes, there are very fine details in my images. So .. my conclusion is .. this issue can be prevented. It's not the camera itself but rather some combination of lens/tripod/methodology. I'm sure that DPR will be able to get sharp images of their test scene and eliminate this issue altogether.

Link | Posted on Jun 1, 2021 at 22:28 UTC
On article Pentax K-3 Mark III added to studio test scene (385 comments in total)
In reply to:

Class A: @DPReview
Food for thought:
https://www.dpreview.com/forums/thread/4578799

Someone cannot replicate the issue you report, and yes, they use a variety of shutter speeds. Is a critical shutter speed range missing from their tests?

I also used 50mm and 35mm lens. No signs of blur at any of the tested exposure times from 0.4s to 1/640s.
https://www.dpreview.com/forums/post/65192900

Link | Posted on Jun 1, 2021 at 16:56 UTC
On article Pentax K-3 Mark III added to studio test scene (385 comments in total)

I did my own test with DFA 100/2.8, FA 50/1.4 and DA 35/2.8. See them here:
https://www.dpreview.com/forums/post/65192900
https://www.dpreview.com/forums/post/65190556
I can't see any signs of shutter shock. Tested times from 0.4s to 1/640s.

Link | Posted on Jun 1, 2021 at 11:35 UTC as 49th comment
On article Pentax K-3 Mark III added to studio test scene (385 comments in total)
In reply to:

tinetz: I'm more wondering why a test of the capability of the camera does not use the latest lens, that was actually made for high resolution sensors and edge to edge sharpness. It's hard to judge results if so many variables play into the results.
However, using the DFA* 50mm would at least exclude any lens
induced deterioration towards the edges.
And by changing the specific setup I'm pretty sure any resonance effect, that's what such a result at specific shutter speeds probably is, will change. It might occur at different speeds, but these might not be the ones used for the test images. I'm pretty sure probably all cameras with mechanical shutter exhibit resonance effects at certain settings. Higher or lower and sometimes just outside used shutter speeds for test images here.

I think that Pentax should send them one of the new 50mm!

Link | Posted on Jun 1, 2021 at 06:58 UTC
On article Pentax K-3 Mark III added to studio test scene (385 comments in total)
In reply to:

dpthoughts: DOOMED. I really don't know what else to write by now. I'm lost for words by now (which is rare) 😉

I thought the forced strong RAW denoising (reaching 3 stops strength already at ISO 400), and the corresponding details fading in the red channel, was already breaking its neck.

But now, even on top of that:
- "SOFTNESS of the K-3 Mark III at its ISO 100 and 200 settings"
- "we were unable to produce a sharp image using the mechanical shutter at these particular settings due to shutter shock."

Remember, this camera is not sold for $400, but for $2000. For a $400 camera, all of this MIGHT have been forgivable, but only maybe. Not for me though, I'd expect sharp pictures from a $400 camera as well. A cheap old Nikon D3500 gives superior sharpness and image quality under the tested conditions.

I don't think I can get sharper images. I really believe that this problem shows only in some particular combination of lens, speed and tripod. I don't have the same lens as Dpreview so I took the 100mm macro as that is the sharpest I have. It is focused properly (manual in LV, making sure there no sign of chromatic aberration) and it was shot at it's best apertures. So I think it can't get better than that. What I show in my post are crops. I think it's quite sharp as I see all the imperfections of the laser printer. All the thin lines even the smallest letters etc.

The point is that it does not look like that the camera has some fundamental problem. It could be either their copy .. or just the unlucky combination of lens, time, tripod.

Link | Posted on Jun 1, 2021 at 06:56 UTC
On article Pentax K-3 Mark III added to studio test scene (385 comments in total)
In reply to:

MarBa: I quickly tried myself .. and I don't see it .. I repeated this 2x, various shutter speeds from 1/3 to 1/640 and at least at the sharpness that I can reach with my 100mm macro, I can't reproduce the "blur". Maybe I need a different "test scene".

Description of what I did and images are in this post:
https://www.dpreview.com/forums/post/65190556

In addition, I did two more series after this to test if "horizon correction" could be the culprit, but it was not. To me all the images I took look identical at 400% in LR (all from DNGs), of course except a bit of noise at higher ISOs.

We could turn this into a hunt for exact combinations of lenses and exposure times that show this problem .. but to me it is good to know that there is no fundamental problem. I may try some other lenses at some point just because I'm curious but I don't care anymore as I know it's not happening all the time at certain exposure times.

Link | Posted on May 31, 2021 at 19:55 UTC
On article Pentax K-3 Mark III added to studio test scene (385 comments in total)

I quickly tried myself .. and I don't see it .. I repeated this 2x, various shutter speeds from 1/3 to 1/640 and at least at the sharpness that I can reach with my 100mm macro, I can't reproduce the "blur". Maybe I need a different "test scene".

Description of what I did and images are in this post:
https://www.dpreview.com/forums/post/65190556

In addition, I did two more series after this to test if "horizon correction" could be the culprit, but it was not. To me all the images I took look identical at 400% in LR (all from DNGs), of course except a bit of noise at higher ISOs.

Link | Posted on May 31, 2021 at 17:05 UTC as 85th comment | 4 replies
On article Pentax K-3 Mark III added to studio test scene (385 comments in total)
In reply to:

zakaria: I saw excellent owners samples at varieties iso .maybe a defective one.!!?

The softness is related to shutter speed. Probably happens (or shows up) at specific exposure times. I think some people who have this camera will have to try to replicate this. Have some very detailed scene (like a small text in a book) and shoot it at various shutter speeds but the same aperture.
I really hope that this will be solved quickly because problem like this will hurt the sales. Either, it's a bad copy .. but that would be worrying because other bad copies could be out there and those would have to be replaced (hopefully as a warranty claim) ... or Pentax will soon say ... "Thank you, we will fix this issue in the next firmware update, we already know how. Please, give us 2 weeks."

Link | Posted on May 31, 2021 at 14:32 UTC
On article DPReview TV: Pentax K-3 Mark III review (598 comments in total)
In reply to:

Richard Murdey: The K-3iii doesn't have to be cheap, it just has to be good enough that Pentax users feel they have something special in thier hands when they buy one. Mostly.

Ricoh has made a flawless APSC flagship dSLR for the post-upgrade generation, and it was the right thing to do. Whether even this will be enough to keep Pentax afloat is still in doubt, however, as Pentax must attract at least enough new users to balance natural attrition. That means convincing someone NOT to buy a Fuji/Canon/Sony/Nikon mirrorless and buy a K3-iii instead. Tough sell? I tend to think so.

I think it is tougher than it looks .. many Pentaxians will not buy this camera either. It does not satisfy all user base. For one thing .. some people focused on FF so will will wait for K1-III. And while this is a great upgrade from K-3 II, there are also couple things that the camera lacks. And for many others it can be just too expensive. So more bodies will have to come to satisfy all current users.

Link | Posted on May 10, 2021 at 20:04 UTC
On article DPReview TV: Pentax K-3 Mark III review (598 comments in total)
In reply to:

Daft Punk: My finger is hovering over the “buy” button for this camera.

I see it as an old school analogue experience blended with the latest tech like pixel shift. I’m sold.

I have just ONE major reservation - focus accuracy. I hate, hate, hate fine tuning the AF on DSLRs. It’s one of the biggest benefits of mirrorless. My old 5DIII was terrible for this. My D810 has an active dislike for the Tamron 35mm prime I brought for it.

If the Pentax doesn’t need AF tune on the 3-4 lenses I would use with it, I am in.

You may need to adjust the lenses. That is why the feature is available.

Link | Posted on May 9, 2021 at 20:36 UTC
On article DPReview TV: Pentax K-3 Mark III review (598 comments in total)
In reply to:

Lightright: I would like to get this camera as I haven't given up my pentax lenses. Although I love the latest AF technology in mirrorless systems, there is always a joy in using manual lenses which I have grown to learn and love. If Pentax can engineer a way to mimic the focus peeking features of mirrorless into their next iteration of dslr's, then I am in!

The only way would be probably to have a transparent OLED in the light pass. Not sure if those are transparent enough.

Link | Posted on May 9, 2021 at 18:17 UTC
On article DPReview TV: Pentax K-3 Mark III review (598 comments in total)
In reply to:

MarBa: I did not know about the crop in 4K. It's not mentioned in the preview article or in the manual for the camera. Thank you for pointing that out!

I don't think these things are even mentioned in the manual! Dpreview should update the spec sheet and the preview article.

Link | Posted on May 9, 2021 at 18:15 UTC
On article DPReview TV: Pentax K-3 Mark III review (598 comments in total)
In reply to:

wed7: Thank you Chris and belated happy birthday Jordan.

I hope the Pentax mngt. is listening well with that fixed screen.

I really hope they listen to all wishes! There is probably more to be improved...

Link | Posted on May 9, 2021 at 10:04 UTC
On article DPReview TV: Pentax K-3 Mark III review (598 comments in total)

I did not know about the crop in 4K. It's not mentioned in the preview article or in the manual for the camera. Thank you for pointing that out!

Link | Posted on May 9, 2021 at 07:27 UTC as 55th comment | 2 replies
On article DPReview TV: Pentax K-3 Mark III review (598 comments in total)
In reply to:

MarBa: Thank you for a nice review and the comparison to D500! Is another camera in for testing at Dpreview? Would be great to see the test scene to know how much NR in raw actually matters.

I'm not assured much honestly. The noise reduction shown by the analysis on https://www.photonstophotos.net/ tells me that this time the NR is far more aggressive than what any other camera applies so that is why a comparison of images of the test scene will be critical.

Link | Posted on May 9, 2021 at 07:26 UTC
On article Pentax K-3 Mark III initial review (877 comments in total)

4K video has a crop. Should be mentioned in the text and the comparison table. Thanks!

Link | Posted on May 8, 2021 at 23:05 UTC as 13th comment
On article DPReview TV: Pentax K-3 Mark III review (598 comments in total)

Thank you for a nice review and the comparison to D500! Is another camera in for testing at Dpreview? Would be great to see the test scene to know how much NR in raw actually matters.

Link | Posted on May 8, 2021 at 22:39 UTC as 67th comment | 2 replies

Cool stuff! I will get a bit of it for fun .. Just a side note .. Do you know why was it such a big deal to use a wide aperture lens? It does not matter, no? What matters is the contrast (the difference in the amount of reflected light) between the black material and the photographed object, no?

Link | Posted on Apr 27, 2021 at 20:11 UTC as 43rd comment
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