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Forum: Photographic Industry and Professionals 2 Hours Ago  
DPR - why we're changing the way we process lens images
Posted By beholder3
Replies: 88
Views: 1,996
The other part of their admitting nonse approaches is even worse:






QuoteQuote:

Canon doesn't pass its distortion corrections on to third-party software, so we can't show its corrections and may have to rely on Adobe or Capture One creating their own distortion profiles. We'll be adding this shortcoming as a 'Con' to all our reviews of Canon R-series cameras,



  • So a tabloid "camera review" is penalized because the converter software makers have to add software components (which they have been doing for many years). Laughable.

  • Further - while there is a dozen of raw developers out there - they will not penalize all the other camera producers for not providing their lens correction profiles to Rawtherapee, Darktable and such for free. Go have a look if your Sony and Nikon lenses are perfectly corrected in all raw developers out there. Will we see that as "Con"?

This is basically blackmailing a camera / lens producer to give away freebies to specifically and only the company Adobe (a well known tiny charity organization in dire need for free of charge input).

The whole market is going up scale and multi thousand EUR equipment now is being judged on a) JPG processed output and b) free giveaways to one specific software maker?
Forum: Photographic Industry and Professionals 1 Day Ago  
Is photography dead?
Posted By beholder3
Replies: 122
Views: 4,630
+1

Best post so far. :)

I'd add that I do expect that a "photo" actually is without heavy content manipulation, otherwise it is just a digital image, same as a comic book image.
So I do expect the type of art/product in front of me to be declared honestly, just the same as I want to know if I eat actual meat or plastic tasting like meat.
Forum: Troubleshooting and Beginner Help 01-11-2022, 02:15 PM  
Clackers' Beginners Tip 3: Electronic Shutters
Posted By beholder3
Replies: 21
Views: 1,001
As clackers wrote, it is about the shutter mechanism not the sensor.

And actually it is not about „stopping motion“ either.
The set shutter speed will typically stop the motion in the sense of freezing it without motion blur.

It is just frozen in a distorted way. The top part in early state, the bottom part in a later state.

A Pentax 645 has 1/60 sync.
A Pentax 67 has 1/30 sync.
A Pentax LX has 1/75.
A Nikon F3 has 1/80.
A Canon AE1 has 1/60.


Leaf shutters are much faster, typically 1/500 to 1/1600 in some very modern cases.

From what I read 1/60 is pretty typical for film SLRs.

And at around 1/60 sync speed the distortion in normal average use cases starts to be a non issue.
Obviously if you shoot very fast moving subjects such as hummingbirdwings or propellers 1/60 is not enough.
Forum: Pentax K-3 III 01-09-2022, 08:45 AM  
K3 mkIII Dynamic Range - Issues or not?
Posted By beholder3
Replies: 70
Views: 4,682
The Imaging Ressource provides raw files of a comparable test target for both the Pentax K-3 III and multiple other models.
So if you are interested, you can do any comparison yourself and do not need to waste time with advertising videos.


Spoiler:
You'll easily find out the Cameraville obviously is a mix of incompetent and/or liar. Not that this is rare with internet-advertising-speakers.
Forum: Troubleshooting and Beginner Help 01-09-2022, 02:31 AM  
Clackers' Beginners Tip 3: Electronic Shutters
Posted By beholder3
Replies: 21
Views: 1,001
To add:

In consumer cameras cheaper than $6000 (those without at least a stacked sensor) ES (electronic shutter) doesn't work with flashes at all due to those readout times (the brandnew Sony a74 for EUR 2800 still is stuck at sad 1/15 sec).

ES even in the expensive cameras has negative impacts (The Nikon Z9 dynamic range in ISO 100-400 is just on the level of a seven year old APSC D7200).

Due to LEDs and other lights flickering at various frequencies much faster than 1/15 ES risks generating irrepairable images with heavy banding. And you only know this after the fact, since every signle light bulb might be flickering at a different speed.

So avoid silent shutter / ES when:
a) there is low light illuminated with artificial light sources
b) fast moving subjects (bicycles, cars, flapping bird wings...)

c) you need a flash (then you normally simply can not turn ES on)

Obviously that is a lot of limitations.
Forum: General Photography 01-09-2022, 02:17 AM  
Ultimate pixel peeping
Posted By beholder3
Replies: 18
Views: 1,022
Two comments:

1) Especially with true art (regardless of oil paining or photography) the pixelcount is completely irrelevant. It either impresses at VGA-resolution or not and "impressing" is not related to any technical aspects. So from the creative/artistic/skill/value side this is worthless.
It probably is good for theft protection, art history, studying painting technique etc.


2) If the museum is smart they turn this image file into 10 NFTs and sell them. I am pretty confident that will generate lots of money for the museum which is always good for the arts.
Forum: Mini-Challenges, Games, and Photo Stories 12-26-2021, 02:04 AM  
Thematic Cosplay photos
Posted By beholder3
Replies: 26
Views: 662
For the most part there was only very little clouds and it was bright sunshine. I do like it that way, because I think the sunlight supports the very colorful costumes.

I am not a fan of indoors situations for this type of photos, due to both the better light and nicer more spaced out background.

One manga fair is taking place in a building right near to a big and nice park, so that is where everybody goes for a walk and picnic.

The other event is mainly a challenge due to being absolutely crowded (pre-pandemic) outdoors, so that is why I ask the models to pose against the river background and that is why you see the railing in the backgrounds.

This is how the situation looks like in reality: https://static.duesseldorf-tonight.de/thumbs/partybilder/9/66/76/11/i_detail...17-1176669.jpg

... for photos like this:

Forum: Mini-Challenges, Games, and Photo Stories 12-25-2021, 02:56 AM  
Thematic Cosplay photos
Posted By beholder3
Replies: 26
Views: 662
Here we only have two events of this type per year (usually in May) and the last two years fell victim to the pandemic.

But here is 278 images I shot in previous years:

Cosplay | Flickr

It is always very colorful and good spirited.
Forum: Photographic Industry and Professionals 12-19-2021, 10:29 AM  
Critical security threat - Log4j - older Adobe Software uses that
Posted By beholder3
Replies: 63
Views: 2,869
Just fyi, the apache guys write this:






QuoteQuote:

Other insufficient mitigation measures are: setting system property log4j2.formatMsgNoLookups or environment variable LOG4J_FORMAT_MSG_NO_LOOKUPS to true for releases >= 2.10, or modifying the logging configuration to disable message lookups with %m{nolookups}, %msg{nolookups} or %message{nolookups} for releases >= 2.7 and <= 2.14.1.
The reason these measures are insufficient is that, in addition to the Thread Context attack vector mentioned above, there are still code paths in Log4j where message lookups could occur: known examples are applications that use Logger.printf("%s", userInput), or applications that use a custom message factory, where the resulting messages do not implement StringBuilderFormattable. There may be other attack vectors.
The safest thing to do is to upgrade Log4j to a safe version, or remove the JndiLookup class from the log4j-core jar.



Forum: Non-Pentax: Canon, Nikon, Sony, etc. 12-14-2021, 04:09 AM  
Nikon's recent press releases
Posted By beholder3
Replies: 60
Views: 2,108
And they have gone one step further by not buying the current G2 version, which in this case actually has some significant improvements.
Pentax used the Tamron design that were current at release time.
This will open the can of worms for Nikon in internet discussions just as has been the case for Pentax. People will question why they have to pay more for the same and they'll get the Pentax answers.

What probably is more concerning to Z-mount fans is that IMHO this release hammers the nails into the coffin of any hope that Tamron will ever release lenses for Z-mount.
In Pentax case the situation was the other way around: Tamron already had stopped new release so rebranded stuff was actually an improvement. For Tamron they all hoped that "soon" Tamron will release all their new stuff for the new mount.


I guess those two lenses are for absolutely different audiences. The Nikon one will probably cost somehwere between +500% and +1000% more than the Canon. They can be lucky if it's for just $5000.
Forum: Photographic Industry and Professionals 12-12-2021, 10:46 AM  
Critical security threat - Log4j - older Adobe Software uses that
Posted By beholder3
Replies: 63
Views: 2,869
As far as I read and understand:
  • Apache is a server software that runs on many platforms (https://httpd.apache.org/) So a windows OS provides zero protection

  • Updating Java does not provide protection

  • It is all about the Log4j plugin software (https://logging.apache.org/log4j/2.x/). So it makes sense to check if you have this on your computer.

--> If you have the Log4j on your computer you might be at risk.
--> more indirectly but that is not something we can realistically protect against: If some company servers using that piece of software are compromised and your computer connects to these (for example "updates") then the infected systems might be turned into virus/trojan slings. And I guess this would be one target for the hackers.


The fun part is here that practically everyone uses the risky software:
"Amazon, Apple iCloud, Cisco, Cloudflare, ElasticSearch, Red Hat, Steam, Tesla, Twitter, and many more"

Here is more info:
https://thecyberpost.com/news/security/apache-log4j-vulnerability-actively-e...va-based-apps/
Forum: Photographic Industry and Professionals 12-12-2021, 09:37 AM  
Critical security threat - Log4j - older Adobe Software uses that
Posted By beholder3
Replies: 63
Views: 2,869
Thanks for the tip. Ultrasearch seems to use the exact same background as "everything". They are just blazing fast and need no indexing.
Forum: Photographic Industry and Professionals 12-12-2021, 07:11 AM  
Critical security threat - Log4j - older Adobe Software uses that
Posted By beholder3
Replies: 63
Views: 2,869
That is interesting. Running the download through Microsofts virustotal yields zero issues.
If you use the Lite version without web functions that's even safer.

Which software claimed the "unsafe"?
Forum: Photographic Industry and Professionals 12-12-2021, 01:56 AM  
Critical security threat - Log4j - older Adobe Software uses that
Posted By beholder3
Replies: 63
Views: 2,869
There is a very broad and critical (highest level possible) security issue out there:

Log4Shell: critical vulnerability in Apache Log4j | Kaspersky official blog

https://www.itworldcanada.com/article/it-could-take-years-for-applications-u...-expert/468238

While one might want to believe "servers" are just computing center and company stuff, it is not that easy.

A simple check on my windows machine searching for filenames "log4j" brought up some older Adobe products which phone home using server functionalities ("CSxService manager") and do employ that component.

For windows users I suggest doing a thorough filename search for "log4j".

The portable/non-install software called "everything" is pretty good and fast for hunting files IMHO. voidtools
Forum: Photographic Industry and Professionals 12-01-2021, 07:30 AM  
Lithium Ion Batteries - collection of photographers' fires and explosions
Posted By beholder3
Replies: 8
Views: 568
Just as a reminder to not be cheap and go full risk with your batteries:

An external flash burnt down the house:
https://www.the-sun.com/lifestyle/2556734/family-charger-explode-house-inferno/

Another flash exploding, luckily only a garden fire:

https://www.diyphotography.net/watch-as-this-flashpoint-godox-battery-pack-explodes-on-camera/

Camera battery exploded in the airport:

https://petapixel.com/2017/11/11/camera-battery-explodes-airport-sparking-panic/

DSLR battery fire:

https://petapixel.com/2018/05/30/when-your-camera-battery-bursts-into-flames/



If it's swollen or otherwise damaged: throw it away.

Buy only stuff that has all safety features on board (most cheap 3rd party batteries only fake those).
Forum: Troubleshooting and Beginner Help 11-24-2021, 11:16 AM  
Can a camera autofocus with a f/5.6 lens through a teleconverter?
Posted By beholder3
Replies: 18
Views: 808
My experience is that Pentax DSLR cameras with their F5.6 sensors can function down to "wide open" F9 lens/converter combos.
But that needs bright and contrasty subjects (due to the effective area of the remaining AF sensor now being so small; I guess the size of the AF cross then is less than 1/3 of the full thing and within that tiny area there needs to be a good contrast edge).
Forum: Non-Pentax: Canon, Nikon, Sony, etc. 11-12-2021, 07:56 AM  
Smartphone camera and video progression
Posted By beholder3
Replies: 74
Views: 2,767
For many applications any current $100 smartphone can deliver results which are no different from what a R3, A1, Z9 can deliver yes.

The Pixel 6 is a pretty high priced item with comparatively low (to nonexistent) advantages versus much cheaper phones or old point and shoots.
The crappy sample images above could have been done 10 years ago with a dirt cheap point and shoot and nobody would be able to tell the differences.


But all this in no way means that outside clearly defined applications no other requirements exist, where a phone is sheer and utter crap.

To suggest so is like stating that since you can do great photos with a DA18-55 a DFA600/4 lens "is not needed".
Forum: Non-Pentax: Canon, Nikon, Sony, etc. 11-11-2021, 06:36 AM  
Smartphone camera and video progression
Posted By beholder3
Replies: 74
Views: 2,767
+1

The Pixel 6 phone seems to have severe issues with colors and exposure. Not important for throw-away documentary snapshots, but then somewhat 2002 level.


Overall any cheap current $100 phone can shoot images which are not different from a $7000 Sony A1 if it is bright daylight, static and big DoF subjects.
So there simply isn't any difference to be expected in these scenarios.

Shoot indoor sports or show 36 MPx resolution details on slowly moving subjects or colorchecker proof colors and that is where they suck.
Forum: Photographic Industry and Professionals 11-11-2021, 12:58 AM  
K-1 Sports Photography - Tutorial Rec's
Posted By beholder3
Replies: 13
Views: 1,017
1) don't zoom during the time you want to push the trigger, zooming disturbs AF function

2) use the center F2.8 AF sensors
3) use back button AF activation well before you intend to push the trigger, so the camera has some data to predict movement. Best to keep the back button AF pushed all the time.

4) on a K-1 with 36 MPx there is no need to fill the frame 100% with the subject, as you can safely crop in post. This makes it easier.
5) turn off SR. You gain nothing while you swing the camera around but it can create unwanted effects.

---------- Post added 11th Nov 2021 at 09:02 ----------

As for framing:

Google sports photos and pick the ones you like the most. Simply try to recreate them yourself. Think about what makes you like them.
Copying is the way to go here. It all has been done before.
Forum: Pentax News and Rumors 10-27-2021, 08:52 AM  
The former president of Ricoh Imaging is back
Posted By beholder3
Replies: 673
Views: 28,934
Those types of activitities can mean two opposing things:

a) someone really creates a new positive push with long term perspective
or
b) some dresses up the bride for marrying a new partner (selling it off)

The one thing this kind of rules out is shutting it down.


Let's hope for a). That will depend on the funds he is given.

I think, all recent products were great, all product decisions were very much in line what the market asked for (in Pentax DSLR world), so zero to complain here. They couldn't have done better.

The one thing that has limited everything is the glacial un-speed, which to me seemed like Pentax is only allowed to invest into new product production based on current earnings - once the previous products have made enough money.
While economically understandable, that emans slowly starving things.
We have to accept the more and more digital world with short product lifecycles.
Forum: Photographic Industry and Professionals 10-24-2021, 12:51 AM  
Contractual difference between pre-order and normal order?
Posted By beholder3
Replies: 6
Views: 772
Most reputable stores here will not charge any money up front for a pre-order and handle it just as a reservation.
Once the item comes close to delivery they confirm a "real" order.

Due to the 14 day free returns without reason to be given after shipment legislation in the EU dealers have no interest in creating more complications.
If you have a good relationship with the dealer they'll even send the item first and only ask you to pay the invoice later.
Forum: Non-Pentax: Canon, Nikon, Sony, etc. 10-24-2021, 12:44 AM  
Z9, will it have a mechanical shutter?
Posted By beholder3
Replies: 47
Views: 1,918
As JPT mentioned, thats not really new. Even recently Sony saved some production cost, by crippling their a7c to not have a fully function mechanical shutter option any longer. The a7c is limited to efcs or just es (and that with Sony's abysmally slow readout times, where the Z9 will be much better).



I hope for Nikon that they will not only again come late to the game with another metoo product like the specs you quoted suggest.

Currently it sounds like an
  • A1 minus resolution, minus EVF resolution, plus 60p for 8k, plus cheaper

  • R3 minus eye controlled tracking, minus GPS, minus motorsports tracking, minus more expensive, plus resolution, plus 60p for 8k

  • potentially minus 30 FPS, if it is only 20 FPS

If they offer a better functioning version of the F-mount adapter then at least on the FPS side they could draw even with Canon for Sigma and Tamron lenses, which Sony actively cripples down to 15 FPS only on the A1.

The Z9 doesn't seem to provide a single strong aspect beyond what's already there from the competition.
That might convince the few remaining Nikon fans, but why should anybody else go down this route?
I don't see this winning anybody over from the other brands nor stopping the leakage from Nikon away.

Let's hope the big spec things are yet to be revealed.
Forum: Pentax DSLR Discussion 10-14-2021, 10:03 AM  
FF vs. APSC
Posted By beholder3
Replies: 182
Views: 7,275
I am not confusing things.

The TO asked about "better quality" and I just highlighted that while you can objectively measure a number of aspects, there is absolutely no way to aggregate all these factors into one single judgement of the "better" type without going massively subjective.

Basically we have a TO asking "compare a tall wife versus a short wife which one is overall better?"
Certainly you can measure aspects like "ability to play basketball" objectively.
But that doesn't give an answer to the "better overall" question that is "correct" or "consensus" or "generally true". :D
Forum: Pentax DSLR Discussion 10-13-2021, 04:00 AM  
FF vs. APSC
Posted By beholder3
Replies: 182
Views: 7,275
Oh, boy.

Even the - mostly irrelevant - measurements-wise "better" discussion is not possible without massive subjective bias.

We are talking about zoom lenses. If the person making the decision has a subjective preference for the shorter focal lengths then story might be quite different from looking at the long ends (where the DFA24-70 is weakest).
Then we have the subjective question which aperture values are most relevant in actual use.
And we have the third question about how relevant extreme corner sharpness is.

Picking out 1) 45mm APSC equivalent + 2) F2.8 absolute + 3) extreme corners is a triple subjective decision that will lead to a fully subjective "better" based on measurements.
And it is highly possible that the APSC combo will win hands down.

Now one could as well include more "techno image quality " relevant aspects like 4) vignetting (which is a nice way of discussing noise on edges) where APSC usually is quite superior.
Or look at 5) lateral CAs where APSC image quality also tends to be better.
Are these aspects relevant for the decision maker?

So we have at least 5 completely subjective factors upon which the "better" discussion hinges.
Forum: Pentax DSLR Discussion 10-12-2021, 01:08 PM  
FF vs. APSC
Posted By beholder3
Replies: 182
Views: 7,275
If theinitial post is a genuine question, then I would recommend looking at real life images in full res from both combos.
I wouldnt waste time reading posts of other people‘s opinions but rely on my own eyes.
Some people obviously forget that all this is about photos.
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