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Forum: Welcomes and Introductions 2 Hours Ago  
Hello
Posted By MarkJerling
Replies: 3
Views: 53
Welcome from New Zealand!
Forum: General Talk 3 Hours Ago  
Tour de France Fantasy - Join PentaxForums League today. Racing starts in 12 hours.
Posted By MarkJerling
Replies: 9
Views: 741
Such time again!

Enter now!
Tour de France Fantasy by Tissot

How to join:

Go to: Tour de France Fantasy by Tissot
Search for League no: 17345
Join the League using password: VHFFI

Create your team and see how you do.
Good luck!
Forum: Weekly Photo Challenges 4 Hours Ago  
Caption Contest Caption contest Opened 1st July 2022 to 8th July 2022
Posted By MarkJerling
Replies: 1
Views: 89
Red wire or black? Red or black? Oh shoot - let's go for red.
Forum: Travel, Events, and Groups 4 Hours Ago  
Kiwi Pentaxians
Posted By MarkJerling
Replies: 18,880
Views: 1,448,119
Good to hear, re Ronald McDonald house. It's my understanding that they provide a good service.
How old is your dog?
Forum: Digital Processing, Software, and Printing 4 Hours Ago  
Discussion of PEF vs DNG and raw files moved from News and Rumours thread
Posted By MarkJerling
Replies: 36
Views: 147
Coincidentally, I see this topic was discussed some years ago too.
See: PEF vs DNG - PentaxForums.com
Forum: Digital Processing, Software, and Printing 4 Hours Ago  
Discussion of PEF vs DNG and raw files moved from News and Rumours thread
Posted By MarkJerling
Replies: 36
Views: 147
Let's turn it around: I'd be super interested to hear what advantages PEF brings over DNG.
So far as I'm aware, a PEF file and a DNG file, as per the output from a Pentax camera, is absolutely identical for pixel data.
I would imagine that a PEF to DNG conversion, done outside the camera and using software such as DCU5 may or may not result in identical raw data, but I have not tested that.

As I understand it, therefore, DNG or PEF, straight from a Pentax camera are both the "manufacturer's proprietary raw format(s)" with the only difference being that DNG follows the file structure as laid down per the Adobe open source DNG specification. I'd be keen to hear if that understanding is incorrect.
Forum: Pentax K-3 & K-3 II 8 Hours Ago  
why I won't buy a k3 (Warning: Satire Thread)
Posted By MarkJerling
Replies: 97,171
Views: 4,342,511
Or, go boil some ribs! :D :p
Forum: Pentax News and Rumors 8 Hours Ago  
New firmware for K3 III and K-1 introduced season specific shooting modes
Posted By MarkJerling
Replies: 115
Views: 8,720
As the PEF / DNG / RAW is an interesting topic, but tangent to the thread this discussion was posted in, I've moved it to it's own thread.
If I've missed any posts in this thread that belong there, then please let me know the post numbers and I'll do a further cleanup.
Here's the new thread: Discussion of PEF vs DNG and raw files moved from News and Rumours thread - Page 3 - PentaxForums.com
Forum: Digital Processing, Software, and Printing 9 Hours Ago  
Discussion of PEF vs DNG and raw files moved from News and Rumours thread
Posted By MarkJerling
Replies: 36
Views: 147
As this is an interesting topic, but tangent to the thread this discussion was posted in, I've moved it to it's own thread.
If I've missed any posts in the thread that belong here, then please let me know the post numbers and I'll do a further cleanup.
Here's the thread this discussion originated in: New firmware for K3 III and K-1 introduced season specific shooting modes - Page 8 - PentaxForums.com
Forum: Travel, Events, and Groups 11 Hours Ago  
Kiwi Pentaxians
Posted By MarkJerling
Replies: 18,880
Views: 1,448,119
A few interesting trademe listings, all by one seller:

Trade Me 645Z body
Trade Me D FA 645 55mm f/2.8 AL[IF] SDM AW Lens
Trade Me smc FA 75mm f/2.8 Lens
Forum: Weekly Photo Challenges 20 Hours Ago  
Caption Contest CAPTION CONTEST: Open Jun 20th through June 27th 2022, 12PM NZ Time
Posted By MarkJerling
Replies: 8
Views: 396
@K2 to K50 is having some computer issues. If, by tomorrow night, there's been no new competition posted by him, I'll ask our second place entry to do the next competition.
Forum: Travel, Events, and Groups 20 Hours Ago  
Kiwi Pentaxians
Posted By MarkJerling
Replies: 18,880
Views: 1,448,119
We visited Mt Bruce on Tuesday for the first time in years. The one kaka photo is shot through thick mesh. How the camera managed that, I don't know.
The kiwi photo is poor, but the best I could do with very, very poor light and the entirely wrong lens.
Forum: Digital Processing, Software, and Printing 22 Hours Ago  
Discussion of PEF vs DNG and raw files moved from News and Rumours thread
Posted By MarkJerling
Replies: 36
Views: 147
The point of a DNG file is not certainty that it's straight from camera or the other options you mention. The point is that it's a TIFF type file with all its parameters recorded in an industry agreed way. That's what makes it good for archival storage.

The original raw data in a DNG file is never altered. The DNG file is writable in certain segments, although not in the raw data segment. As such, with the correct tools, it should be possible to find what modifications, if any, has been made to a file. Certainly, people who work in the evidential image sector will be able to tell if a DNG file has been manipulated or not. This could be done by looking at factors such as whether they're looking at Raw DNG" or "Linear DNG" and other pointers, well beyond my understanding.

The whole point of DNG is to be a universally accessible raw format. I've yet to see evidence that the different parameters you mention cannot be found by people with the necessary skills. It's not an "elephant in the room" moment.

For more information about the DNG format and how it preserves it's original dataset without manipulation, see: https://opencommons.uconn.edu/cgi/viewcontent.cgi?article=1027&context=libr_pubs

The Library of Congress only uses DNG format and, for many reasons, views it superior to all other proprietary (manufacturer based) raw formats. It's also the archival master format at The National Gallery of Art, Washington, D.C. It is, in short, the most trusted raw format there is and can operate without the input of any specific supplier's camera / system specific software.
Forum: Pentax K-3 & K-3 II 1 Day Ago  
why I won't buy a k3 (Warning: Satire Thread)
Posted By MarkJerling
Replies: 97,171
Views: 4,342,511
Huh? :confused:

You've wandered into the completely satirical and famous WIWBAK3 thread. If you'd like to join in the banter, go right ahead.
If you'd like to do "gear talk", then please read the entire thread and answer the 403 question multiple choice questionnaire which you can find about halfway down page 2304.
You'll find questions like: "What Is the Airspeed Velocity of an Unladen Swallow?" Answers include: "African or European?"
If that sounds too hard, then write a 100 page essay on "bacon" or "squirrels" and stand in the corner for a half hour.
Forum: Pentax K-3 & K-3 II 1 Day Ago  
why I won't buy a k3 (Warning: Satire Thread)
Posted By MarkJerling
Replies: 97,171
Views: 4,342,511
Priceless as we'd say. Great story.
Forum: Travel, Events, and Groups 1 Day Ago  
Kiwi Pentaxians
Posted By MarkJerling
Replies: 18,880
Views: 1,448,119
We're a bit far. When I had my operation in Wellington Hospital, my wife stayed at an Airbnb literally 5 minutes from the hospital, but when I search on Airbnb it does not come up so I guess it's no longer an Airbnb. But, also no pets, so would not have worked.
Forum: Digital Processing, Software, and Printing 1 Day Ago  
Discussion of PEF vs DNG and raw files moved from News and Rumours thread
Posted By MarkJerling
Replies: 36
Views: 147
All the information I can find online (and through Adobe) points to DNG being based on the TIFF file format, which is an industry standard file format, to which a set of rules is then applied so that Adobe (or other software) can read a DNG file regardless of origin. There's also a particular (loss-less) compression algorithm as well as the ability to determine very easily if the file has been corrupted in some way.

Because DNG uses a specific file specification, all users should be using that specification. See: Digital Negative (DNG), Adobe DNG Converter | Adobe Photoshop
So far as I can tell, therefore, there is no evidence to suggest that the DNG specification varies from brand to brand.
Forum: Weekly Photo Challenges 2 Days Ago  
Caption Contest CAPTION CONTEST: Open Jun 20th through June 27th 2022, 12PM NZ Time
Posted By MarkJerling
Replies: 8
Views: 396
PM has been sent.
Forum: Digital Processing, Software, and Printing 2 Days Ago  
Discussion of PEF vs DNG and raw files moved from News and Rumours thread
Posted By MarkJerling
Replies: 36
Views: 147
PEF = "Pentax Electronic File"
DNG = "Digital Negative Image". "DNG is an open-source, royalty-free, highly compatible raw image format used by many different camera manufacturers."

I don't think there can be any argument that DNG is used by more camera brands than Pentax. It's also the preferred format for a number of archival systems, most notably the US Library of Congress.

Here's a little video that delves into this in more detail.
















You Tube




Of course, you'll notice the video is from 2010. Back then, there was probably less support on all operating systems for the PEF and other proprietary raw formats. DNG sought to address that problem.

I'd argue that it still offers advantages over PEF and other proprietary raw formats.
Forum: Welcomes and Introductions 2 Days Ago  
Penta Asahiflex
Posted By MarkJerling
Replies: 4
Views: 164
Welcome from New Zealand Andy!
Forum: Welcomes and Introductions 2 Days Ago  
Couldn't stay away from Pentax!
Posted By MarkJerling
Replies: 13
Views: 581
Welcome from New Zealand Jason!
Forum: Welcomes and Introductions 2 Days Ago  
Pozdrawiam z Polskich Beskidów
Posted By MarkJerling
Replies: 3
Views: 178
Welcome from New Zealand!
Forum: Pentax K-3 & K-3 II 2 Days Ago  
why I won't buy a k3 (Warning: Satire Thread)
Posted By MarkJerling
Replies: 97,171
Views: 4,342,511
Truth be told, I've missed all things cricket as one of my oldest friends was over visiting from Brisbane. We've not seen him or his family for 11 years so it was quite special to catch up on everything. Pizzas, single malts and red wine were on the menu and a good time was had by all.
Forum: Pentax K-3 & K-3 II 2 Days Ago  
why I won't buy a k3 (Warning: Satire Thread)
Posted By MarkJerling
Replies: 97,171
Views: 4,342,511
Nice. We have one of those for camping and it's great.
Forum: General Talk 2 Days Ago  
Alas, many good things come to an end.
Posted By MarkJerling
Replies: 44
Views: 1,338
Steve, I've been away from the forum for a few days so missed your post.
Your kind and knowledgeable interactions in this forum has always been appreciated. I will miss your posts and am deeply saddened that we will cease to have your contributions and, indeed, that those that know you must learn to live without you. Please know that you will be sorely missed.
It's heartening that you intend sharing your gear.

I wish you only the best for this part of the journey.
Most sincerely,
Mark
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