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Forum: Ricoh GR 05-30-2019, 01:58 PM  
GRIII doesn't show up as a USB device on a MacBook
Posted By jup
Replies: 21
Views: 4,409
Have you tried the latest firmware, 1.11? They mentioned some (cryptic) fix related to Mac: Latest GR III Firmware Update : Software Downloads | RICOH IMAGING.
Forum: Ricoh GR 05-10-2019, 12:45 AM  
AC adapters for GR III
Posted By jup
Replies: 6
Views: 2,053
I stand corrected. I think you're both right and it's Power Delivery that's the main requirement. I was confused by my Samsung 15W charger but that's apparently Quickcharge, while the camera only talks to PD devices. I just got 10,000 mAh power bank with PD support from Amazon - Anker PowerCore 10000 PD, 10000mAh Portable Charger USB-C Power Delivery (18W) Power Bank - and it powers the camera just fine without battery. It's also pretty compact and probably equivalent to carrying around about 6 or so extra batteries. Definitely a keeper. I'll update the original post.

Curiously, I don't think the camera ever draws more than 1A @5V from any charger/battery. That's what it says on the sticker and that's what my USB tester says. But maybe they want to have extra margins for spikes.
Forum: Ricoh GR 05-08-2019, 09:57 AM  
AC adapters for GR III
Posted By jup
Replies: 6
Views: 2,053
Thanks chickentender. Updated the post.


I am not sure it's that simple. The Samsung adaptive charger I tested is definitely 9V capable. It's a 15W charger that comes standard with Galaxy Tab S4 and delivers 2A @5V and 1.67A @ 9V as per the sticker and my testing with USB tester. Yet it will not work as AC adapter for GR III, it will only charge the battery.

But it can be related. Maybe you need full 18W capability at the minimum, which is what Pixel charger has. Looking at images of K-AC166U online, it actually seems to be 36W adapter - it can provide 3A @ 9V or 3A @ 12V.
Forum: Ricoh GR 05-07-2019, 12:13 PM  
AC adapters for GR III
Posted By jup
Replies: 6
Views: 2,053
I am starting this thread more out of curiosity than anything else. One of the great things about the new GR III is that it uses USB-C port for charging/connection, which is standard and huge improvement over proprietary connectors. I have bunch of USB-C chargers/cables lying around and carry some with me wherever I travel. The camera also comes with adapter which will charge the battery in camera, and I believe pretty much any USB-C charger will do that as well.

But, to get to my point, some chargers (or external batteries) can do more - Ricoh also sells AC power adapter, K-AC166U, that is able to power the camera, even with no/empty battery. Other chargers have this capability as well, and you may already own them.

Update: It seems that any charger/power bank supporting USB power delivery will work. I will try to keep the list bellow updated with known devices, especially since in many cases the fact they suport PD is not obviously stated, but any device supporting power delivery should be fine.

So, here's the list of chargers/power banks that will work as AC adapters for GR III:
  • Original Google Pixel charger (TC-G 1000 US) - sold as Google 18W charger here in the US

  • Dell laptop USB-C port (XPS-15)

  • Lenovo 65W adaptive charger (for a Thinkpad X1 Yoga laptop). Model No. ADL65YDC2A

  • Anker PowerCore 10000 PD, 10000mAh Portable Charger USB-C Power Delivery (18W) Power Bank

  • Samsung Galaxy Tab S4 - yes, the tablet will actually power the camera, while allowing file transfer at the same time

Note that while power output of the adapter may play some role, this is about more than just power rating of the adapter. Samsung adaptive chargers, which are also capable of providing 18W power, will not provide AC power to GR III.

I'll be glad to add more to this list. I don't think that the ability to power this camera externally matters that much for camera like GR III, nobody's shooting with it long sessions in studio, but it comes in handy for things like transferring lot of photos via WiFi to my phone while traveling or just experimenting.


How to test this:
  1. Remove battery from Ricoh GR III

  2. Plug the charger to be tested into the camera

  3. Press power on

If the camera powers on in the last step, you're in possession of an AC adapter providing full power to your GR III. It will also show plug on the screen where the battery indicator normally is. Note that you don't need to remove the battery for normal use - I just consider it a more clear proof than simply looking for the plug indicator.

Disclaimer: Do this at your own risk. While I strongly believe that USB-C is standard for a reason and no civilized USB-C charger should damage the camera, if you end up creating a black hole, I won't be responsible. :hmm:
Forum: Pentax DSLR Discussion 05-21-2018, 07:13 AM  
Developing With Pentax SDKs - Who's working on stuff?
Posted By jup
Replies: 9
Views: 1,894
The SDK itself is not open source, so modifying it would not be easy.

That said, it seems that type of connection (USB/Wifi) is just a parameter on both C++ SDK and java SDK. Maybe it can be switched. I am very curios as to what is actually possible here.

Or maybe Pentax themselves will release official support for Wireless desktop connection if there's enough interest.
Forum: Pentax KP 08-31-2017, 11:32 PM  
Wireless flash compensation
Posted By jup
Replies: 5
Views: 863
Actually, after more playing with this, regular exposure compensation does indeed have direct influence on wireless P-TTL flash. And that's true even in manual mode. Dialing in -2 EV on KP in wireless controler mode gives me dark pictures. But dialing in -2EV on camera and +2EV on flash results in about the same flash exposure as having 0 on both. It's also what AF-540 FGZ II user guide says: " If you want to use multiple flash units set to P-TTL and adjust the amount of light at the same time, use the camera’s exposure compensation."
Forum: Pentax KP 08-31-2017, 12:59 PM  
Wireless flash compensation
Posted By jup
Replies: 5
Views: 863
KP can only use the tiny on board flash in wireless controller mode, not as master (ie. the flash only provides control of other wireless flashes, but does not contribute any light). That's as per specs: Specifications | PENTAX KP | RICOH IMAGING.

Don't know about K-30 but even my K-3, when it's in controller mode, doesn't allow specifying the flash compensation. I am not expert on Pentax flashes but I believe, on newer bodies, the flash compensation you dial on the camera flash as well as the compensation you dial on any external flash only applies to that particular unit. There isn't "master" flash compensation that applies to all flash units participating in exposure (but you could try using exposure compensation). Which makes sense, because you may want different units to expose with different intensity. It also means that in controller mode, flash compensation on camera has no meaning.

What is really missing is just the ability to use on board flash in wireless master mode. I don't know why it was removed, but my feeling is that mainly because the on board flash on KP is really tiny (guide number 6, which is half of K-30), so it would more often than not be overpowerd by external flash. So I doubt it's coming back.

What you can of course do, and what Pentax probably wants you to do, is get external flash that supports wireless master mode and put it on the camera. But that requires extra flash.
Forum: Pentax DSLR Discussion 08-24-2017, 08:02 PM  
Pixel Shift
Posted By jup
Replies: 12
Views: 1,175
I wonder, and this is just a speculation, if you zoom more when shooting a crescent. ;)

As Adam said, Pixel Shift only works well with non-moving objects - which basically means, the subject shouldn't move across the pixel boundary between the time first and last image is taken - otherwise, you'll have issues. Since this is a common problem, both Pentax software and RawTherapee have movement detection mode. But what RT does (and what probably Pentax does as well) is when it detects movement, it will fall back to using single image only for the areas where the movement happened. So you won't get any advantage from using Pixel Shift and you could still get issues since movement does not always have to be detected (my understanding is, since with Pixel Shift, two of the four images are green channel, one of the easier ways to detect the movement is compare these two images for any changes, but that has its limits).
Forum: Pentax DSLR Discussion 08-24-2017, 04:09 PM  
Pixel Shift
Posted By jup
Replies: 12
Views: 1,175
The in camera RAW development, at least on KP, can turn the pixel shift off (I don't think you have any control over which image it uses, but it should just use one). RawTherapee can give you any image from PixelShift DNG - just go to RAW -> Demosaicing and select one of the images.

Yes, there is a hope. ;)
Forum: Pentax SLR Lens Discussion 08-24-2017, 02:32 PM  
HD 20-40 or HD 21 & HD 35 macro
Posted By jup
Replies: 33
Views: 5,305
This is a tough call.

I have all three (my primes are SMC version but that makes little difference) and I use them for different reasons. HD DA 20-40 does make an excellent walk around lens with weather sealing, excellent image quality and fast silent focus. It pretty much lived on my K-3 for a looong time and they go great together. On shorter end it probably beats DA 21 picture wise (though some people like unique perspective of that lens) and gives you a bit larger aperture. On longer end, your 35 is definitely better and has the macro option. I honestly think my copy of 35mm may be the sharpest lens I own, period. That said, I know the review on this side was really pretty critical of the 40mm end, but personally I never had much issues with picture quality on my 20-40 so I can't say I'd be too worried. You're not expecting it to be in the same bag as 35mm but it was always great in practical use. I do miss the extra stop occasionally though.

One thing to note is that 20-40 is significantly larger than either of your lenses (although for its size, it's very light) - it's by no means a large lens, but even 35 is tiny compared to it. Since I got KP I use the primes more simply because they seem to belong on that compact camera.;)

It all comes down to preferences. If weather sealing and not changing lenses is important to you, which it seems it might be, since it's going to be on your secondary and walkaround camera, 20-40 wins. If you want to keep the ultimate image quality (and I honestly think that 35mm may be the sharpes lens I own) in tiny size, primes are still better. And even 21 can make a decent walkaround in many cases.

You could also get 20-40, try it for a while and see how you like it. ;)
Forum: Pentax DSLR Discussion 08-23-2017, 11:59 AM  
The wrong focal length IBIS
Posted By jup
Replies: 11
Views: 989
KP has the same functionality. You can add focal length setting to INFO menu for quick access. I am pretty sure any K-3ii replacement will have that too.
Forum: Pentax KP 08-18-2017, 02:30 PM  
AE-L in Manual Mode
Posted By jup
Replies: 2
Views: 1,308
Since KP manual is rather abbreviated, I just thought I'll sure what I noticed on my KP.

I suppose most people here are aware of what some call Hyper Manual mode. In M mode, you can press green button to get immediate metered exposure (depending on your settings). You can also use AE-L button (if you have it mapped to any of the buttons customizable buttons) to lock exposure so that changing aperture automatically changes shutter speed and vice versa. I just noticed that KP also extends this to ISO. Changing ISO value while in M mode, with exposure locked, changes shutter speed. Maybe this is old news, but K-3 certainly didn't do this. It's especially cool when you have ISO on the third dial via smart function. Then you can press AE-L to tie all thre dials (representing all three variables of exposure triangle) together and press it again to modify each individually.

It's these little things and improvements that I love about Pentax. Too bad KP manual doesn't even bother to mention function of AE-L in M mode. I would really thing the Pentax should want more people to know about these.
Forum: Pentax K-1 08-18-2017, 02:14 PM  
Pentax K1 - EFCS + OVF
Posted By jup
Replies: 54
Views: 4,905
You're probably right. It's just that I can set shutter speed to any value between 30s and 1/24000s with ES enabled, so I was wondering if there's any reason to use it for slower shutter speeds.
Forum: Pentax K-1 08-18-2017, 12:07 PM  
Pentax K1 - EFCS + OVF
Posted By jup
Replies: 54
Views: 4,905
KP has full on electronic shutter in OVF mode and from my quick and dirty tests in introduces something like ~0.1s lag. The manual is not very detailed though so I honestly don't know how much it would help with the blur since mirror still has to go up. In all frankness, while I have KP, I am not really sure what are advantages of using ES in OVF except for achieving shorter times compared to mechanical shutter. Any ideas? LV is different question entirely, there you have the benefit of silent shutter.

That said, since this is available on KP, I wouldn't rule out making it into K-1 firmware sometime in future. Although scan time of full frame sensor may be even longer.


Not only that. My first ES pictures happened to be under fluorescent/LED lightning and I got such a nice banding that I almost returned my camera as broken. ;-)
Forum: Pentax SLR Lens Discussion 01-12-2016, 12:41 PM  
35/2.8 and 100/2.8 at 1:1 magnification
Posted By jup
Replies: 24
Views: 1,861
One advantage of 35mm that hasn't been mentioned is that it's theoretically easier to hand hold at the same magnification - DoF being larger and focal length being smaller you can get away with hand held shots sometimes. I say in theory, because in practice it's also subject movement (wind etc.) and ultimately for macro you'll want tripod anyway. I have both, and like 35 mm as a universal tiny lens with macro capabilities as a bonus, but when I know I will want to shoot macro, it's 100 mm I take.
Forum: Pentax K-3 05-16-2014, 12:06 PM  
FluCard broken
Posted By jup
Replies: 32
Views: 4,922
I just returned the card for exchange. Got a new one that so far is working fine. The only thing I mentioned, when you go to the pentax page on the card, it always starts in Japanese but quickly switches to English on working card. On broken card, the switch never occurs. I still think this is software bug most likely, but hard to say.
Forum: Pentax K-3 03-23-2014, 10:04 PM  
FluCard broken
Posted By jup
Replies: 32
Views: 4,922
BTW, I can change the language on the page by calling some JavaScript functions. It just doesn't do much for functionality. But it gives the menu that it normally gives and the pop up then says "Please wait..." With images that are still broken (as are in the initial picture). I have this feeling that most functionality of Pentax FluCard is in one HTML file:confused:.

Still believe something got corrupted. The only question if it's something small (which can be easily fixed by finding the right setting/command) or big. Too bad there's no firmware for this thing anywhere yet, since reflashing it might just do the trick.

In a sense it's fun to play with its linux filesystem. But I don't have days to spend on this, so I'll probably send it back.
Forum: Pentax K-3 03-22-2014, 10:28 PM  
FluCard broken
Posted By jup
Replies: 32
Views: 4,922
/mnt/mtd/config/config.trek looks like it's not used in normal operation with OF-C1 (at least not directly), although it exists (and can be changed with cgi scripts, ie. http://pentax/cgi-bin/input). I can force the card to use it by calling flu_app directly from autorun.sh (found it by the side effect) but that's not very useful.
Forum: Pentax K-3 03-22-2014, 01:30 PM  
FluCard broken
Posted By jup
Replies: 32
Views: 4,922
Thanks. Yes, I can connect to the card via telnet. But I still don't know what to change:






Code:



# ls

bin home linuxrc param_value.txt sbin usr www

dev init lost+found proc sys var

etc lib mnt root tmp wifi_flag.txt

# cat /proc/cpuinfo

Processor : ARM926EJ-S rev 5 (v5l)

BogoMIPS : 50.68

Features : swp half fastmult edsp java

CPU implementer : 0x41

CPU architecture: 5TEJ

CPU variant : 0x0

CPU part : 0x926

CPU revision : 5



Hardware : KeyASIC Ka2000 EVM

Revision : 0000

Serial : 0000000000000000



The only possible problem I see (but I don't have another flucard to compare to) is broken formatting in /home/config.trek - it's missing opening parenthesis on LANGUAGE]





Code:

# cd /home/

# ls

config.trek

# cat config.trek

LANGUAGE]

English

[AP]

AP_ACCOUNT : 3

SSID : test1

Key : 81461A688C

SSID : Rubbish and Dustbin

Key : 0102030405060708090A0B0C0D

SSID : Trek_Test_TP-LINK

Key : 1234567890

[FTP]

FTP Path : 192.168.3.100

User Name : minjian

Password : trek2000

[Wi-Fi Setting]

FLUCARD SSID : Trek_FLUCARD_WiFi

Channel : 11

My IP Addr : 192.168.1.1

Target IP Addr : 192.168.1.1

[MISC]

Download Enable : no

Power Saving : on

Buzzer Mode : Normal

#



However, that file is obiously autogenerated. Any change I make to it gets wiped up on reboot. I browsed around the filesystem on the flucard for quite a while and don't see any obvious place where this file gets generated (it's not init scripts, at least not directly) and where config parameters come from. But if you're already telneted to the card, you can still please check how your /home/config.trek looks.
Forum: Pentax K-3 03-21-2014, 11:21 AM  
FluCard broken
Posted By jup
Replies: 32
Views: 4,922
As I said, I tried different browsers - Safari too, which haven't connected before this problem started at all, so it's no just caching issue. I also tried clearing caches. If it was language problem, the card would still function, just in Japanese. But it doesn't, I cannot get inside of the any of the menus, it just displays the message I've posted before. I tried switching language of the camera back and forth, that was one of the first things I tried, but again - no effect on card.

Basically, unless someone knows how to totally reset the card into factory defaults (other then formatting), then I don't think there's much hope.
Forum: Pentax K-3 03-20-2014, 10:33 PM  
FluCard broken
Posted By jup
Replies: 32
Views: 4,922
It's the card that is broken. Chrome for Android does use almost zero resources for background tabs. Google did hell of a job with it - it won't sweat at all with 70+ tabs. Unlike any desktop browser (Chrome included). But that's not the issue here, so could we please get back to the topic of the card instead of Chrome?

I am not silly. I did try connecting from my tablet and just for the heck of it also from ipod with Safari. The page is still the same.
Forum: Pentax K-3 03-20-2014, 11:59 AM  
FluCard broken
Posted By jup
Replies: 32
Views: 4,922
What? This is Google Chrome on Android. There is actually an Easter egg you get to once you open 100 tabs ;): Chrome for Android Easter eggs: stupid tab tricks - Android Community. Google's such a show off... Anyway, this has nothing to do with it. Chrome will easily manage 100s of tabs open. Now if I can manage them, that is a different question.

Beeping is normal (three beeps). Connection is strong and worked fine before the crash. Cannot switch channel since I cannot get into the menu to switch channel. No overheating, as I said, card was out for the day and this persisted right after it got inserted. I guess it will get shipped back.
Forum: Pentax K-3 03-19-2014, 01:58 PM  
FluCard broken
Posted By jup
Replies: 32
Views: 4,922
The menu setting only resets communication settings. And as I said, I tried both of these. I also tried leaving the card out for the day and inspecting the card in the computer. Doesn't do much. Can always send it back to Adorama and get a new one, but it seems very fragile and has me worried how long the new one will last...
Forum: Pentax K-3 03-19-2014, 11:58 AM  
FluCard broken
Posted By jup
Replies: 32
Views: 4,922
I managed to get my FluCard into unusable state after first 30 minutes of use. The card was in the camera in remote capture, working fine, I switched from P to M mode and connection died. On subsequent reconnects, all I get is broken menu (in Japanese?). Tried to format the card/reset communication settings to no avail.

I attach screenshots of the menu and what happens when I try clicking any of the items.

Anybody had this happen before? Any ideas what I could try before sending it back?

PS: I did contact Trek support (no response so far) and will try to contact Ricoh as well.
Forum: Pentax DSLR Discussion 03-05-2014, 03:16 PM  
Resurrecting Pentax firmware hacking
Posted By jup
Replies: 765
Views: 264,718
Me too.
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