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Forum: Photographic Technique 11-04-2020, 01:02 PM  
The ISO 1 Million Club?
Posted By stevebrot
Replies: 51
Views: 3,729
You could make neo-impressionistic painterly images!


From: Pointillism - Wikipedia


Steve
Forum: Pentax News and Rumors 09-25-2020, 08:42 PM  
2020 Pentax Forums T-shirt Contest!
Posted By impossibro
Replies: 55
Views: 8,981
I have been saved by Adam's deadline extension :p


Anyways, here's my design. Inspired by Astrotracer, I made a stylized, doodle KAF-mount filled with the infinite of space.



Forum: Pentax Camera and Field Accessories 08-26-2020, 01:05 PM  
Pentax D-li90 battery adapter for the Hähnel Procube 2 Charger
Posted By Mikkel128
Replies: 12
Views: 2,429
Hi All,

I read a favorable review of the Hähnel Procube 2 Charger on dpreview and wanted one for my Pentax Batteries. The procube 2 charger uses a modular design to fit many brands of camera batteries. I contacted Hähnel and was sorry to hear that they have plans to support the Pentax D-Li90 batteries. They did offer suggestions for one of their other chargers that would fit this battery the Unipal Plus and they did reply very swiftly, so I cannot fault their customer support.

Since the design of the Procube is modular, and this really was the charger I wanted, I decided to purchase one anyway and try to modify it myself. This required some 3D printing and a little bit of soldering.

I have uploaded the 3D files on thingiverse, if anybody wants to copy my design.

https://www.thingiverse.com/thing:4576379

The charger works great with the Pentax batteries, and it is a very nice feature, with the LCD display, that displays the battery levels.

Feel free to ask me any questions, if you need help assembling the charger.

Best regards,
Mikkel
Forum: Pentax News and Rumors 05-24-2020, 06:35 AM  
D FA 21 Limited is one of the three.
Posted By Parallax
Replies: 1,748
Views: 145,944
So am I.

ENOUGH!

:closed:

We'll consider re-opening this in a day or so.

The forums lately have become far more confrontational and less civil than we (the moderators) are willing to tolerate and these schoolyard testosterone spitting slap fests are going to stop.
Forum: Pentax DSLR Discussion 01-22-2020, 10:15 PM  
400,000 Shutter Count Club
Posted By iCrop
Replies: 12
Views: 1,364
My trusty K-50, bought new in July, 2015, just had another milestone. 400K shutter count on January 16, 2020. After 250K, in December, 2017, I sent it in to Precision for a CLA, but only to make sure it would last a bit longer. there were no problems with it. They said it needed the aperture block replaced, though there were no issues with exposure, I said go ahead. The actual 400,000 image had just a bird butt in it, so i tossed it. Here's the next worthwhile one, number 400256.
Forum: Giveaway Archives 02-27-2018, 03:20 AM  
2018 Pentax Survey
Posted By BigMackCam
Replies: 156
Views: 4,978
How can a survey requesting information be considered any kind of "shut up"? :hmm: Frankly, this shows a quite astonishing lack of appreciation for Adam and the PF staff who've done their best to pull together a meaningful survey for us, the forum members. It's not perfect, no... it might not cover everyone's needs, might be missing some things, but it's a really well-intentioned and - in many respects - fairly comprehensive effort, from which a lot of useful data can be harvested. Could we applaud the staff for putting in the work, perhaps?

To Adam and the staff who prepared this - THANK YOU...
Forum: Giveaway Archives 02-26-2018, 10:06 AM  
2018 Pentax Survey
Posted By angerdan
Replies: 156
Views: 4,978
"2.Which forum's user are you?"
doesn't cover users who're registered at booth :)

"6.How many images to you shoot per year (2017)? This refers to shutter actuations, not how many images to keep later on."
Do you?

"12.Look at the following list of prime lens options and pick your max. 3 most wanted lenses.

FF 17mm F4 T/S at about 2400 EUR
FF 19mm F4 T/S at about 4000 EUR"
The less wider lens should be cheaper instead of more expensive.



"17.Your most images are shot at which FF equivalent (!) focal length ?"
If you use the same lens on APS-C & FF, this question isn't perfect. In my opinion it should only reflect the used physical focal length, not any equivalent angles of view.
Forum: Giveaway Archives 02-26-2018, 03:56 AM  
2018 Pentax Survey
Posted By mazwick
Replies: 156
Views: 4,978
Hi Adam,
please consider the 645 users as well! the Survey covers only APS-C and FF
Forum: Pentax News and Rumors 07-09-2017, 03:51 PM  
Pentax User Map : New Forum Feature!
Posted By Adam
Replies: 88
Views: 18,627
I'm rolling out a new member-only feature that will make it easier for you to find fellow Pentax users in your area:

Worldwide Pentax User Map - PentaxForums.com

Adding your location is optional and you can choose the degree of accuracy you want (I don't recommend pinning your home address, for example!). If you set your location (even if you decide not to make it public), the map will show you the 10 nearest members with public locations.

The map is accessible via the "forum" dropdown menu on both the homepage and the forum, as well as through a link at the top of the member list and through the sidebar of each member's profile.

Attachment 363247
Forum: Pentax K-30 & K-50 02-21-2017, 01:01 PM  
K-50 / K-500 Aperture Solenoid fix (DIY with pics)
Posted By madphys
Replies: 417
Views: 108,527
I hope this will be of help to those who are afraid to slightly take apart the camera, are not able to get their cameras serviced or the repair is too expensive. There are related bits of information scattered around the forums but I will try to put everything here - step by step - an easy to follow approach.

This can be applied to other cameras than K50/500 but the placement of screws can be a little bit different. In general it is the same for all models - you just have to be observant when looking for the screws.

So my approach uses an old but fully functional K100D (If you have an old camera gathering dust you can try a similar approach). I didn't want to ruin the K100 as it was in mint condition but after a long thought I figured out that I won't affect its functionality in any way. So the earlier models such as isD, K100D, K10D, K200D etc have a better quality solenoid part (it doesn't seem to fail in such large numbers) in them + they have 2 solenoids in them - other controls the flash compartment. Yes...this means less work to get the part.

Essential Tools required: Patience, 100g Vodka (HUMAN SR), Small but long screw-driver that fits the screw-heads - I suppose it is a JIS-type but you could get away with phillips, small soldering iron with rather pointy tip (low power - for electronics), tweezers (will help with the tiny screws and soldering).

PART I (Extraction from the donor_K100D).

To extract the solenoid we need to remove just the top cover

1) Press the open-flash button and don't close it. Take out the battery prior following operations.
2) If you didn't open the flash, then: Opening the flash...as it is electronic, we need to push the lock manually - for that we need something thin but rather stiff...something out of plastic works just fine. The lock is positioned on the side of the grip - so slide in the sheet of plastic inside the gap and wiggle - flash pops open.
3) Unscrewing screws -there are 8 screws to unscrew before it is possible to take off the top cover. 2 screws are hiding behind the rubber of the viewfinder (refer to Figure 1 of K500 as it is very similar) - pull the rubber part upwards to remove, next, 2 screws are in the flash compartment - that is why we opened it (Figure 2, green circles), 2 screws are each near the strap loops (Figure 2, purple circles - on K100 position is a bit different but you will find them), 1 screw is at the side of the flash compartment (Fig.3,b, purple circle)+ there is one final screw hiding in the battery compartment (Fig.4, green circle).

Figure 1


Figure 2


Figure 3


Figure 4


4) Now we can carefully take off the top cover. And what wee see - it is Fig 5.

Figure 5


5) The solenoid is held in place by one single screw - so we need to unscrew it...take notice - the contacts at the solenoid end are fixed with polymer - so it is hard to unsolder them - this is why I chose to unsolder at the board end and take out the solenoid with wires.

Figure 6


6) As can be seen in Fig 6, it is an easy task to unsolder the wires. Get your soldering iron up to the temperature and just touch the pads - if needed use tweezers and pull of the pink and purple wire. DO NOT heat the pad for prolonged time - if you didn't succeed, let it cool and try again a bit later. You don't want to overheat these pads.

Extraction completed!

Part II (getting to the green friend)

In theory you wouldn't need to remove the top cover of K50/K500 but as it is easier to change out the solenoid with wires - we will have to remove the top cover as well. Plus with loosened screws of the top cover it is easier to get off (and back in) the front cover.

1) Let's remove the bottom cover. Figure 4 - shows already removed bottom cover - take notice that some screws go inside metal and some inside plastic - so obviously threads on them are different - what I want to say - there are so many different screws in this camera - don't mess up. It is very advisable that you somehow take exact notice from which place you unscrewed a particular screw - make a sketch of the camera body if it helps or maybe you have a phenomenal memory.

So - Fig.4 purple circles are outer screws which are obvious. Blue circles show 2 screws which are underneath the battery compartment cover (so obviously you will need to open it). So Purple + Blue screws = bottom cover can be removed. Nice

2) Now the bottom cover has been removed but our goal is to remove the front cover - so underneath the bottom cover there is one more screw (green circle), which has to be unscrewed...and while we are here - undo the one inside the battery compartment (because we will need to remove the top cover as well)

4) The top cover goes the same as in the case of K100D - please refer to pictures. If you decide not to remove the top cover (somehow you have acquired fresh part and you want to solder the wires at the solenoid and not at the board), then still you need to undo screws inside flash compartment and one above RAW button (Fig.3). I would also advise to undo the top cover screw at the strap loop (Fig.2 - purple circle one the left) - it will hugely help to get the front cover back in more easily.

5) Final screws for the front cover...They are hiding beneath the rubber. (Fig 3 - green circles) - so on the right side there is one obvious screw and one underneath the rubber, but on the left side of the camera (right side of the image) - both are hidden from view. You need something sharp - I used my sharp tweezers to slightly rip of the corners (market with arrows) - the rubber sits on some sort of double sided tape, so it won't be too hard.

6) Now the screws have been undone (I really hope I didn't forget any) and it is time to remove the front cover. It sits tight. I suggest to start with the grip side - don't force it too much. But a slight force should be applied to get it off. The keyword is patience. Just to be safe - be careful with the flash capacitor (Fig.3 b shows its approximate position). If you have multimeter you can check the voltage across its terminals - If HOT..then discharge with ~10 KOhm resistor or just wait with the voltmeter attached.

7) Bingo...now we see our green friend (Figure 7). Again - you need to undo just one screw...I didn't drill any holes in the battery compartment and you don't need it either - a slight angle - when you use a long screw driver doesn't hurt. When you remove the solenoid be careful not to change position of the gear.

Figure 7


8) Unsoldering part - top cover has to be removed, because it is where the soldering pads are (Figure 8). Again be very careful - don't overheat - just touch with soldering iron and simultaneously remove the wires. BTW this is the part where HUMAN SR becomes handy. If something doesn't goes right - don't force it - let it cool and try again later.

Figure 8


9) Now let's look at both solenoids side by side (Figure 9)

Figure 9


As you can see - the dimensions are the same - color of wires is the same - so it is 1:1 replacement - both in K50/500 and K100D purple goes back to purple, pink goes back to pink.

10) So it is obvious that we put the better part from the K100D inside K50/500 where it will function as it should. When I checked the green friend I found that the magnetic attraction was really strong...the white friend could be taken appart considerably easier. So as I didn't want to limit functionality of my K100D, I decided to put the green friend back for opening the flash - as it is not such a crucial place (basically I have never used the built in flash). But before I did it - I used the "filing-trimming" method on the horse-shoe ends. You don't need to file a lot - just a bit (Fig. 10 shows my approach). After filing the force that hold it in place became considerably weaker...so I thought - good enough - and put it back in K100D, where it indeed works like intended.

Figure 10


So to put everything back you need to work in reverse order. Word of caution - when putting back the front cover - pay attention to the AF-switch...The equilibrium position is C.AF - move the switch on the cover in C.AF position and move the actual switch on the body also in its middle position - it will help to get the front cover on with the first time and not to take it off when you discover that something is wrong with the AF switch.

I hope this can help someone who is ready to try this operation. There is just no need to let a good camera loose some of its functionality.

UPDATE:

I did a bit of digging about solenoid part and I came up with some links for you. Still it is not that easy to buy just one single solenoid for a regular person, but - here is the info:
1) Part made in South Korea
2) Alibaba offering what I guess is the same as above
3) Summit electronics - this I think is already known
4) Maotech with some extended specifications

So I suppose these can be ordered just in large quantities. My guess is that for a regular person who doesn't have an old K100D or doesn't want to apply the "filing mod" (as it might not be a permanent fix, as reported by some people) the best thing is to hunt for a cheap (used) DVD or CD drive from laptop. I did a quick search and managed to find something as cheap as $5 on ebay. But - unfortunately these drives can utilize different solenoids so it is a lottery to some extent.
Forum: Post Your Photos! 08-26-2016, 09:08 PM  
Macro Oh my aching back !
Posted By old4570
Replies: 6
Views: 934
Too much bending for these ,,,,










Forum: Pentax News and Rumors 08-22-2016, 04:42 PM  
Pentax K-70 with "accelerator unit"
Posted By rawr
Replies: 89
Views: 18,099
Now there is the currently shipping Socionext M-8M to look forward to in future Pentaxes. :)
From a press release late last year:



And 4K video at 30 fps, with low-power usage.

A future K-3 III and K-1 II will probably make use of this M-8M Milbeaut, I bet.
Forum: Pentax News and Rumors 08-24-2016, 03:06 PM  
Pentax K-70 with "accelerator unit"
Posted By D1N0
Replies: 89
Views: 18,099
Forum: Sold Items 05-01-2016, 09:09 AM  
Wanted - Acquired: Sigma 400mm F5.6 APO (AF Tele Macro)
Posted By Scorpio71GR
Replies: 4
Views: 618
This is a very rare find. Best bet will be a seller from Japan. I have only seen one in the Marketplace. Another option is the Tokina 400mm.

Tokina 400mm f5.6 ATX AF Lens Reviews - Tokina Lenses - Pentax Lens Review Database
Forum: Ricoh Theta 360° Cameras 02-29-2016, 07:36 PM  
Ricoh Theta At The Edge Of Space
Posted By JimmyDranox
Replies: 8
Views: 2,513
A very interesting usage for this tiny camera was made by a group of students, called Earth to Sky Calculus. They have launched this camera with a stratospheric balloon, up to 115,000 feet - 35 000 meters, above California's Sierra Nevada, capturing fantastic images. I must mention that the camera withstand temperatures of - 65 degrees Celsius, and a thermal pack was used to keep the batteries warm.

A picture before the launch:


Theta Image


A ''low'' altitude image. The baloon and the Sun can be seen:


Theta Image


A high altitude one:


Theta Image


A spectacular shot of the moment after the balloon has exploded;


Theta Image


Here is the group Facebook page:

https://www.facebook.com/Earth-to-Sky-Calculus-174490502634920/
Forum: Pentax Forums Giveaways 01-15-2016, 01:57 PM  
READ ME! Pentax Tips from the Community (55-300mm Giveaway)
Posted By mattb123
Replies: 773
Views: 111,245
A lens like this would make a nice small travel zoom for when you don't want to carry something like the 60-250 around.

Since I have the non-wr version, if I win I'll give away my old one to a forum member. :)
Forum: Pentax Forums Giveaways 01-15-2016, 01:21 PM  
READ ME! Pentax Tips from the Community (55-300mm Giveaway)
Posted By martyd14
Replies: 773
Views: 111,245
My biggest Tip?

Shoot for yourself. Don't worry if no one notices you. Keep working and keep trying new things. I have been doing photography for around 6 years now and I am in one of the biggest slumps of my life. But today? I will keep shooting. Keep trying to get better. The rest will catch up.

There is no equipment in the world that will make me pick up that camera and press that shutter. No software, no new lens that can take the place of passion, motivation and creativity.

That is my advice.
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