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Forum: Troubleshooting and Beginner Help 10-11-2021, 05:29 AM  
Full spectrum cut filter
Posted By Kobayashi.K
Replies: 3
Views: 481
I gave Heliopan a look and they have one UV/IR cut filter size 30.5 x 0.5 in their price list, part nr. 1530 [1]. Heliopan has exactly one step-up ring 30.5 x 0.75 to 37mm, but several others with a 30.5 x 0.5 thread [2]. It looks the 30.5 filters mostly have a 0.5 mm thread pitch.

Heliopan
http://www.heliopan.de/wp-content/uploads/Preisliste.pdf
[1] For UV/IR cut filters see table 'Digital-Filter UV-/Infrarot-Sperrfilter'.
[2] For step-up rings see table 'Zwischenringe – Reduzierringe – Adapterringe'
Notice that some rings go up to a thread with 0.75 pitch and others have 0.5 on both sides.
Forum: Pentax Film SLR Discussion 10-06-2021, 11:18 AM  
Post your B&W Film shots
Posted By Kobayashi.K
Replies: 10,957
Views: 1,275,505
@fs999, thank you for excellent photos and the useful recipes for the development in Caffenol. Generally most of them have a full range of gray values in the histogram for good contrast. Is this the range of gray values you directly get from the negative, or is there still an adjustment needed with the scanner or in Silverfast?
Forum: Film Processing, Scanning, and Darkroom 10-03-2021, 03:11 PM  
Please validate or critique my choice of film processing chemicals
Posted By Kobayashi.K
Replies: 61
Views: 2,234
BigMackCam, if you only intend to shoot and develop small amounts of films, take a look at the new Tetenal Parvovin Tabs (developer), and Tetenal Superfix Tabs (fixer). The tablets can be stored for many years, and one tablet is good for one or two films.

https://tetenal.com/consumer-shop/s-w-chemie/phototabs/
Forum: Pentax News and Rumors 06-13-2021, 11:09 AM  
PF Pentax Interview 2021 - Question suggestions
Posted By Kobayashi.K
Replies: 201
Views: 16,514
So, to honour the advise from Kunzite, my question to Pentax is: is the menu structure as we see it now the final version or can we expect any updates in firmware in the near future, with perhaps also a Help function in the form of tooltips on the items with the INFO button.

I now quit this thread, thank you all for the constructive discussion.
Forum: Pentax News and Rumors 06-13-2021, 05:50 AM  
PF Pentax Interview 2021 - Question suggestions
Posted By Kobayashi.K
Replies: 201
Views: 16,514
Thank you for your encouraging comment. My example is showing the contrast between two design teams, and one of them looks very amateuristic at times. And yes, I have a K3-III. Very nice camera for the task I had in mind, that is JPEG monochrome with Custom Image. There are not many cameras that can be set up so easy for an optimum histogram, including the Leica Monochrom and Q2 Monochrom and to keep it stable in various lighting conditions.
BTW I know how to use the menus on a Pentax since I have the K5-II, K-50 and K-70 despite they are a hack, but one can become accustomed to it quite easy.
Forum: Pentax News and Rumors 06-13-2021, 04:20 AM  
PF Pentax Interview 2021 - Question suggestions
Posted By Kobayashi.K
Replies: 201
Views: 16,514
That is plain stupid, and they already doing this for years. My Olympus EM1X has a massive menu structure and *all* navigating is simply done with the Up, Down, Left, Right, and OK buttons on the 4-way controller, nothing else. The 4-way controller hasn't even a print on it because everybody expects it is for navigating. And when you need info for a selected menu item you press the INFO button and a tooltip is shown with an explanation what the item is doing (amazing, the logic). That's all. How much brains do you need to design such an obvious interface.
Forum: Pentax K-3 III 06-12-2021, 04:38 PM  
External power
Posted By Kobayashi.K
Replies: 17
Views: 1,193
Thanks. I like your BLUF style, never seen before.
Forum: Pentax News and Rumors 06-12-2021, 12:11 PM  
PF Pentax Interview 2021 - Question suggestions
Posted By Kobayashi.K
Replies: 201
Views: 16,514
Everything is possible. Leica makes cameras which have only basic functions and a simple user interface, but with a high price due to extensive design efforts, top quality materials and careful production. A Lomo camera is very basic and it has a low price. What I would like to see (from Pentax) is a simple camera with the quality of the K3-III at about the same price or a tad lower. That can simply be done by removing functions as proposed above. Such a camera should be offered as an alternative alongside the standard camera as we know it for users who like a minimalistic design, and I am convinced it is a cheap way to expand the palette.

I would say, listen carefully what users are requesting to learn what could be improved, but don't implement everything right away because these users have no clue about the consequences.

The result of feature creep is always a bloated user interface. So in practice if you would honour all the requests made in this thread the camera becomes unusable. My proposal is to do the opposite: KISS.
Forum: Pentax News and Rumors 06-12-2021, 10:29 AM  
PF Pentax Interview 2021 - Question suggestions
Posted By Kobayashi.K
Replies: 201
Views: 16,514
An interesting aspect in the Wikipedia article, at the bottom is:

"Feature creep combined with short deadlines will often lead to a "hacky solution". The desired change may be large enough to warrant a redesign of the existing project foundation, but deadline pressure instead requires developers to just "make it work" with a less elegant approach."

The K3-III is actually plagued with hacks. Without expanding on that too much I'll mention four of them:

1. In some places the menus are using the INFO button to advance into the structure instead of OK or the > button. It is a lazy hack, because the INFO button is supposed to give information.
2. The menu structure for setting the smart functions is a mess, and it looks implemented in great haste.
3. The DCU software is baked into the camera to replace the CD, but it cannot be updated, while software is supposed to be upgradeable during its lifetime. So after one upgrade (which already happened) the DCU is sitting in the camera for nothing.
4. The functionality for using M- and K-series lenses in automatic modes uses exposure measurement at full press of the shutter with all sorts of ugly consequences. Exposure measurement should always be done at half-press. They have done that to prevent users complaining about the sound of the aperture closing with the green button functionality every time you touch the shutter button with a half-press.
Forum: Pentax News and Rumors 06-12-2021, 05:33 AM  
PF Pentax Interview 2021 - Question suggestions
Posted By Kobayashi.K
Replies: 201
Views: 16,514
I said "... and *not* for the purpose of reducing the price". I also don't say Pentax should imitate Leica, it is about the minimalistic style I propose and many users would prefer, which can be implemented as desired. Reducing the number of buttons and controls would preferably imply weeding out the corresponding functions or otherwise make them available via the menus only. You can't make a lean camera without ditching functions, or the other way around, current models suffer from feature creep (well known to software developers).

P.S. Pentax and the many posters on this thread should read this:
https://en.wikipedia.org/wiki/Feature_creep
Forum: Pentax News and Rumors 06-12-2021, 04:39 AM  
PF Pentax Interview 2021 - Question suggestions
Posted By Kobayashi.K
Replies: 201
Views: 16,514
A lean K1 for me means with half the amount of buttons and controls it has now, a fixed rear screen, no built in flash. Leaving out JPEG (or RAW) has no influence on the price and it wards off buyers. However, a lean version from K1-II or K3-III alongside the standard version with the same built quality is a good idea, but I would see that as a minimalistic style (think Leica), and not for the purpose of reducing the price. When the camera is based on an existing model it could be produced with almost no extra development costs, and it gives the customer more choice.
Forum: Pentax K-3 III 06-10-2021, 03:18 PM  
External power
Posted By Kobayashi.K
Replies: 17
Views: 1,193
That would mean one or more pins on the USB are signaling to the camera that a power delivery capable device is connected instead of a 'normal' connection.
Forum: Pentax K-3 III 06-10-2021, 02:38 PM  
External power
Posted By Kobayashi.K
Replies: 17
Views: 1,193
The English manual on p40 it says in the small print: "If the camera is turned on while charging, the charging stops".

My test:

- When the camera is connected to the USB power adapter AC-U2 (Europe) and the USB-A to USB-C cable, and the camera is off, the self timer lamp on the back is on and blinks every 5 sec, signaling it is charging.
- Similarly when the USB cable is connected to an USB-C connector on the computer instead of the power adapter, and the camera is off, it is also charging.
- When the camera is switched on in both cases, the self timer lamp goes off. It is not charging.

So one might conclude, when the camera is turned on it does not use power from a source on the USB.

P.S. I did an other test with the battery removed. When the USB cable on the camera is connected to the power adapter or the USB on the computer, and the camera is switched on with the main switch, the camera doesn't come to life.
Forum: Pentax Film SLR Discussion 06-10-2021, 11:41 AM  
:cool: Lets see those ''film'' shots
Posted By Kobayashi.K
Replies: 23,745
Views: 3,051,969
[Auto merge posts]
If you make two consecutive replies to a thread, they will be automatically merged by default.
You can choose to disable this behavior.

My account | Edit Options | Auto-Merge double posts
Yes = Default
Forum: Pentax K-3 III 06-10-2021, 08:58 AM  
A few K-3 III questions
Posted By Kobayashi.K
Replies: 22
Views: 1,188
I have seen fraying of my valuable Nikon AN-4B straps on Pentax cameras and in the past put a small leather strip inside the loop to prevent that. But what you are saying is that the invention of this ring by Nikon is a waste of time, and that all the other brands don't know why they are using them.

As far as I know Leica is the only one who hasn't this type of ring. They have classic circular rings instead, but most of the Leica owners are using leather straps I guess, and these are not as much vulnerable to fraying.
Forum: Pentax K-3 III 06-10-2021, 08:20 AM  
A few K-3 III questions
Posted By Kobayashi.K
Replies: 22
Views: 1,188
These split rings with the small plastic bit are an invention of Nikon to prevent fraying of the strap. And all other brands are copying them and implementing it correctly. However, Pentax (with the supplier of the rings) is the only one who has no clue how this simple item works. Very sad. I dumped them in the litter bin and got original Nikon rings (and a Nikon AN-4B strap).

---------- Post added 06-11-21 at 01:33 AM ----------



A design compromise implies that you understand what you are doing and that you are searching for an optimum, but in the case of Pentax it is plain stupidity in most cases. They are the laughingstock for the other brands.
Forum: General Photography 06-10-2021, 07:14 AM  
Cousins
Posted By Kobayashi.K
Replies: 7
Views: 719
At some point I was completely fed up with the introduction of the K3-III endlessly postponed (and the bicker about flippy screens on this forum), so I looked for an alternative to shoot monochrome in particular. After a search among all brands, I spent 3 days unraveling the EM1X manual (680 pages) to look for a skeleton in the cupboard, but all signs stayed green and I snapped it up when the price went down. I also looked what lenses were available and saw some small high quality metal lenses (I got the 12 and 17mm). However an 28mm equivalent (my standard lens) was not available so I got a Panasonic 14mm F/2.5 for that.

For setting up the camera for monochrome shooting, a Pentax is far more convenient using Custom Image Monochrome, including color filters, and also the D-Range feature. All of this can also be done with the EMIX but most of it is deeply hidden into the menu structure. So, actually the Pentax is an excellent choice for shooting JPEG and all the choices you have in Custom Image. So in the end I also got a K3-III.

The EM1X (and the EM1 which is virtually the same camera) is endlessly customizable to the point you can invent a feature for yourself and then search the manual if it is available. And most of the time you can indeed find it. Notably the viewfinder can be customized in great detail, showing a big histogram live, a zoom option for focusing manual, and grid lines (which are also customizable by themselves) etc. Of course a disadvantage is that all these features must be set via the menus, which is a very large structure and only understandable with the user manual as a guide. All the items though have a Help by pressing the INFO button on the item.
Forum: Pentax K-3 III 06-10-2021, 05:21 AM  
A few K-3 III questions
Posted By Kobayashi.K
Replies: 22
Views: 1,188
I fully agree with these points including the SFn thing. If you look in the Pentax Camera Reviews thread you might think this camera is perfect, but the truth is there is long list of strange design failures on this camera. I'm not going to mention them here though, because Pentaxians are allergic to critique.

P.S. When I make an exception in the context of the strap issue there are two other points worth mentioning.
1. The split-rings supplied with the camera, for mounting the strap, have a construction fault, exposing the bare wire-ends to the inside of a mounted strap, potentially causing fraying of it after some time. The plastic bit on the ring is there to force exposing the smooth part of the ring to the strap but it is mounted wrongly and the position cannot be changed because the ring is not a regular triangle.
2. The strap lug on the left side is too close to the Mode dial on top. The camera tends to tilt forward quickly even with a light lens, so the strap is easily bouncing into the Mode dial when walking around. That could lead to a failure of the mode dial in due course.
Forum: General Photography 06-10-2021, 04:41 AM  
Cousins
Posted By Kobayashi.K
Replies: 7
Views: 719
I am a long time Pentax user and recently also got the K3-III, but alongside I also have the Olympus EM1X. It is strange but I immediately settled in with this camera, the design, the ergonomics, and the extreme customizability. The way Olympus communicates with their customers, everything well organized, and all details well thought out into perfection is in strong contrast with Pentax. However, Pentax and Olympus are both underdogs, so that is certainly a binding factor.

I don't want to pick off customers from Pentax, but nowadays you can get an EM1X body with the same price as the K3-III, and if you like small well built lenses similar to the Limited series, Olympus has a few of them too. And if you are cautious about Olympus's future, be aware Pentax could be in the exact same situation tomorrow. That is a similarity between these two brands too, albeit less positive.
Forum: Pentax DSLR Discussion 06-09-2021, 05:10 PM  
Pentax K1 manual is 140 pages when Pentax K5 manual is 380+ pages, why?
Posted By Kobayashi.K
Replies: 28
Views: 1,835
There is a relation between the number of pages and the amount of info you get from the manual. More info is more pages, you can see that from the Olympus EM1X manual which has 686 pages, and it fully describes every little detail.
Forum: Pentax DSLR Discussion 06-09-2021, 04:22 PM  
Pentax K1 manual is 140 pages when Pentax K5 manual is 380+ pages, why?
Posted By Kobayashi.K
Replies: 28
Views: 1,835
You missed that the newer manuals have two pages side by side on one PDF page instead of one.

However, even when you double the number of pages for the K1 manual it has still less pages than the K5 (or even K-50) while the K1 is two (or three) times more complex.

Instead of counting pages a better benchmark is to count the number of discussions on the this forum to figure out how all the features work that are not mentioned or insufficiently explained in the manuals. And lack of detailed descriptions was actually the complaint of OP.
Forum: Pentax K-3 III 06-09-2021, 08:03 AM  
A few K-3 III questions
Posted By Kobayashi.K
Replies: 22
Views: 1,188
In a similar way it also momentarily shown in the viewfinder, which is quite practical actually.

The 'image counter' is officially called 'image storage capacity' in the user manual, but these instances for LCD panel and viewfinder (p16) are not showing up in a search because they are hidden in a larger string.

It seems the image storage capacity is only permanently shown in the Status and Live View screens.
Forum: Pentax News and Rumors 06-07-2021, 03:39 PM  
K-3 Mark III firmware V1.02 now available.
Posted By Kobayashi.K
Replies: 39
Views: 4,134
I wonder if the firmware update is also for the random freezes of the camera as some users reported, hidden in
'Improved stability for general performance'.
Forum: Pentax K-3 III 06-07-2021, 03:07 PM  
Initial Reaction: K-3 III
Posted By Kobayashi.K
Replies: 234
Views: 19,436
When I saw those reviews I thought WOW! so many 10's, this is the most perfect camera Pentax has ever made. I have considered making a review too, but I have too many founded points of critique, so I'm not adding my contribution to bring those numbers down to a more realistic level. Pentaxians are very sensitive to that, and it would too much harm my reputation on this forum.
Forum: Pentax News and Rumors 06-07-2021, 01:38 PM  
K-3 Mark III firmware V1.02 now available.
Posted By Kobayashi.K
Replies: 39
Views: 4,134
That is very true. I have studied this random thing as a sort of hobby because I wanted to know if you can create a true random process in software. But doing so I came to the conclusion that it is plausible that 'random' actually doesn't exist, and that we are only calling a process random because it is too complicated to find out its deterministic properties.
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