Forgot Password
Pentax Camera Forums Home

Showing results 1 to 25 of 103 Search:
Forum: Contest Voting 03-14-2018, 12:43 AM  
Moonlight lights the vulcano Teide under the Milky Way in bright moonlight + a meteor
Posted By LeFanch
Replies: 29
Views: 328
I would like to nominate this photo
Forum: Contest Voting 03-14-2018, 12:37 AM  
Moon Eclipse
Posted By LeFanch
Replies: 24
Views: 290
I would like to nominate this photo
Forum: Pentax K-3 10-24-2016, 11:09 PM  
Posted By LeFanch
Replies: 3
Views: 858
Hi Michael,

You can find the groups here.
There is a link in the menu at the top of the forum's page.

Forum: Pentax Camera and Field Accessories 12-11-2015, 12:35 PM  
So who makes the "best" SD cards?
Posted By LeFanch
Replies: 20
Views: 2,123
I use some Sandisk Extreme Pro 95MB/s and Lexar Professionnal 633x on my K3 and I am quite happy whith them.
Forum: Welcomes and Introductions 12-07-2015, 08:58 AM  
Hello from new french member
Posted By LeFanch
Replies: 9
Views: 461
Bienvenue ici, Sylvain! ;)
Forum: Pentax Full Frame 08-25-2015, 07:56 PM  
Poll: When do you expect the new Full Frame in shops?
Posted By LeFanch
Replies: 47
Views: 6,100
I voted for November 2015...
Maybe a bit optimistic. :)
Forum: Travel, Events, and Groups 03-09-2015, 01:10 PM  
2015 Pentax Forums T-Shirt Design Contest
Posted By LeFanch
Replies: 367
Views: 54,885
I like that. A lot. :-)
Forum: Welcomes and Introductions 11-02-2014, 06:30 AM  
New member from France
Posted By LeFanch
Replies: 9
Views: 361
Bienvenue ici, Alain! ;)
Forum: Pentax DSLR Discussion 03-05-2014, 12:04 AM  
Resurrecting Pentax firmware hacking
Posted By LeFanch
Replies: 721
Views: 216,980
Donated as well...
Forum: Pentax DSLR Discussion 03-03-2014, 02:05 PM  
Resurrecting Pentax firmware hacking
Posted By LeFanch
Replies: 721
Views: 216,980
Cool! :)
Forum: Pentax DSLR Discussion 03-02-2014, 05:13 PM  
Resurrecting Pentax firmware hacking
Posted By LeFanch
Replies: 721
Views: 216,980
Awesome! :D
Forum: Pentax K-3 12-03-2013, 08:12 PM  
K-3 astrophotography
Posted By LeFanch
Replies: 27
Views: 9,680
Hi mamathot,

If you're interested in making your own power adapter, I recommend visiting this thread.
A few persons (including me) have been listing what's needed.

If you need more info, let me know.

Forum: Pentax K-3 11-11-2013, 12:05 PM  
K-3 In-Depth Review: November 12th
Posted By LeFanch
Replies: 93
Views: 14,521
Great news, thanks Adam!
Forum: Pentax News and Rumors 09-12-2013, 12:37 AM  
New Firmware for K-500, K-50, K-5 II, K-5 IIs, K-5, K-30, K-01, K-r, and 645D is out
Posted By LeFanch
Replies: 60
Views: 14,190
It looks like the EXE files contain the previous version, the very last version can be found in the zip file ("Mac/Windows" version).
Forum: Pentax K-5 10-17-2012, 12:59 AM  
SD card preference for your K-5
Posted By LeFanch
Replies: 16
Views: 2,413
I use only Sandisk Extreme cards, and have not had 1 issue so far.
Forum: Pentax K-5 10-14-2012, 11:25 PM  
K-5 For Astrophotography
Posted By LeFanch
Replies: 1,068
Views: 244,240
Great pictures Stéphane!

Now that I seem to have better results with K5 and O-GPS1, I hope I can get half as good as you! :)


Edit : I've had a look at your gallery... It's going to take time before I get half as good. A very long time!
Forum: Pentax SLR Lens Discussion 10-09-2012, 12:54 AM  
Poll: Have you ever broken a lens mount?
Posted By LeFanch
Replies: 23
Views: 2,398
Never broke any mount so far... (finger crossed) :)
Forum: General Talk 09-22-2012, 05:40 AM  
Definition of a Pentaxian... by an 8 year old
Posted By LeFanch
Replies: 6
Views: 1,425
Nice! :-)
Forum: Pentax SLR Lens Discussion 09-16-2012, 03:10 AM  
Good news for the manual lens lovers: New Helios 40-2
Posted By LeFanch
Replies: 17
Views: 4,999
That's great news! I love Russian lenses, and never had a chance to own this one... :-)
Forum: Pentax DSLR Discussion 08-26-2012, 12:46 PM  
Poll: Which Pentax FF would you buy ?
Posted By LeFanch
Replies: 54
Views: 3,943
Mid-level for me... ;-)
Forum: Pentax Camera and Field Accessories 08-23-2012, 12:31 PM  
Poll: How many memory cards do you have?
Posted By LeFanch
Replies: 48
Views: 4,710
6... from 1 GB to 16GB, all Sandisk Extreme.
Forum: Digital Processing, Software, and Printing 08-22-2012, 02:14 PM  
Poll: What kind of post processing software do you use?
Posted By LeFanch
Replies: 32
Views: 2,925
UFRaw and Gimp, sometimes Rawtherapee...
Forum: Do-It-Yourself 07-31-2012, 05:26 AM  
D-AC50 power adapter cheap replacement
Posted By LeFanch
Replies: 32
Views: 18,049

Here is how I made my adapter...

What I wanted:
A 12V to 8.4V that I could connect...
- Directly on a car battery
- On a smaller battery (carried in backpack)
- In a car, on a cigarette lighter plug
- To a 220V (or 110V) to 12V transformer.

What I needed:
- Adjustable voltage regulator from Dimension Engineering, 25$
- A MQ172-3SA-CV(50) connector, 3$
- DC connectors 5.5x2.1mm (male, female). 6$ per pair
- Speaker cable (price depends on length used)

There are only 3 pins on the regulator, making easy to mount it. If you don't want to solder it, you can use a breakout board.

On the GND pin, 2 wires will connect. One from the power supply ( (-) on battery), one to the connector on the camera side.
Vin connects to the battery (+) or 12V transformer
Vout connects to the connector on camera side

On the battery side, I soldered some DC connectors, in order to be able to use it in all kinds of combinations. However it is not absolutely necessary to put DC connectors on the cables if you plan on using this in 1 unique configuration.

The tricky part is actually to solder the cable to the connector on the camera side. The contacts are not very large, and are close to each other. It is not technically difficult, but it is important to make sure that there is no solder bridge between the contacts. Fortunately, we use 2 contacts out of 3, the middle one remains unconnected, that makes it a bit easier.
I put some heat-shrink around the contacts after soldering them, but some electrical tape can be used.

Since the voltage converter is put in-line with the cables, I chose to tape the wires to it, in order to prevent too much stress on the connections. Any tension will be taken by the wires in that case.

The finished "product" looks like the picture below.

Before connecting the adapter to the camera,the voltage needs to be adjusted to 8.4V. This can be done by turning a potentiometer with a small (flat) screwdriver and checking the voltage value with a multimeter.

I must emphasize that even though that might seem a bit technical to some, it really is simple. Really. I managed to do it, believe me, that's proof enough... ;-)

I have not found the spare connectors and converter yet (moving house) so I have not had the opportunity to take more detailed pictures, but I will try and do that ASAP.

I hope this helps...
Forum: Do-It-Yourself 07-15-2012, 02:29 AM  
D-AC50 power adapter cheap replacement
Posted By LeFanch
Replies: 32
Views: 18,049
Unfortunately I will not be home before 28th July so I cannot post pictures right now. I will as soon as possible!
Forum: Do-It-Yourself 07-15-2012, 12:37 AM  
D-AC50 power adapter cheap replacement
Posted By LeFanch
Replies: 32
Views: 18,049
I went the lasy way, using a regulator from DimensionEngineering...
All you need is a connector on battery side, the connector on camera side (MQ172-3SA-CV(50)), some wire to link those to the regulator.

Total cost for me, as I had a small battery (12V) and the wire : 29$.

I used it for several hours when taking pictures / videos of birds in a park nearby. That works very well.

I had also made an adapter based on Roamingdrones design, that worked fine, but I did not use it in "real life" conditions.

I hope that helps...

Search took 0.01 seconds | Showing results 1 to 25 of 103

Forum Jump

All times are GMT -7. The time now is 05:54 AM. | See also:, part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]