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Molto interessante.

I used the sanding method, and it worked! Thank you 🙏

Thank you my friend, I was skeptical about this , but to my pleasant surprise it worked and it's not that difficult to unscrew the screws , it seems to much at first but it's not. Make sure you got all your screws in place, I've got one extra after reassembling 🙂but still works fine. Thanks again

Pentax has known about this for awhile and did basically nothing for the consumer on this. I'll get a Nikon next time.

This just saved me HUNDREDS of dollars!!!!!

MVP This camera has been sitting in my closet for years and now it is working again

Thanks, it was very useful. I "scraped" the little jumper with what I had at home, which is 120 sand paper, for a few minutes, and it's less used than yours but seems to work fine anyway. But warning: you should be very careful when taking off the front cover, as I broke a little plastic handle for the screw right next to "K50". Well, it doesn't prevent it from working or anything, but I'm a little sad. Anyway, even with that mishap, I just saved tons of money, hoping it will last! NB: my K50 was 5 years old, bought it in 2016. Price announced by the repairman was 250€, roughly 300$ (sent to and fixed by Pentax France).

Muy buena explicación. Gracias!! Por cierto, sabes como descargar el flash con la cámara abierta para que no te pegue descarga? Gracias y enhorabuena.

It worked for me! Thank you

Hi all. Had this issue on my K50 after not using it for 6 months. Nervous about about openiong it up and managed to find a trick that solved the problem. Put it in burst mode and fire off a load of shots. Delete them and repeat a few times. Problem solved.

Mamma Mia!!! But how ugly and poorly built these digital Pentaxes are!

Shame! After twenty years, Pentax has not yet learned how to properly build a solenoid dedicated to photographic mechanics.

Thank you very much! And your english is just perfect.

Fantastic! It worked! Thank You, mbs! Your english is GREAT! Better than the music I saw in other videos related to this K50 issue. Well, I'm bad! I must admit that In other videos I saw how to disassemble the envolving panels of the machine. In fact, there is an obscure screw, the biggest one of all, that is inside the battery case, which was almost unnoticed. For years I used this camera to take pictures in manual mode. It has been a dedicated camera to take still shots. Never used P mode nor automatic mode. Only recently I noticed this issue, since I had to compensate the light in an odd way. After the repair it works like new! Great job, mbs! About WD-40, I DO NOT Recommend it. That is oil, even though it's very thin. In the medium term, it will cause friction on the solenoid, with the consequence of losing the speed of the mechanism. Beter to use Isopropyl Alcohol or Spray electric contacts cleaner. Some guys use WD-40 to improve the performance of the lens diaphragm. The real risk is to render the lens unusable, as it will have to be disassembled to clean the blades, which lose their speed. Hey guys, a photographic camera is not a sewing machine! The latter use much more force than photographic cameras to move its mechanisms.

My work around so far has been to just only use it for m42 lenses with an adapter so far so good

Would not invest in a pentax again

Thank you for the video. This helped me fix my K50. Only took around 20 minutes.

Thanks man! I had this issue for the second time and the repair cost ~100€ and last 3 years maybe. Now I did not want to pay so much and tried this. WORKED! Though I broke off one of the cables from the actuator or what this magnet holder is, so I had to solder it back. I sanded the magnet a little bit more but looks promising. I'm courious how long will this fix last... :D Anyway thanks for the video! Helped a lot!

Thanks, worked for me, great video. Maybe need to explain more about the 3 screws under the rubber part and mainly to be careful with the most important and worst placed screws of all, the one for the selenoid, make sure to use a long and slim screwdriver to get a good angle and not wreck the one and only screw. Thanks again. Btw I have the impression that continuous shooting has slowed down a lot. Anybody felt the same?

You are a star!! I had a quote for £164 to fix my camera. Instead I bought the part from Ebay for £8 and took 20 minutes replacing the horseshoe magnet by following your clip.Thanks a million times!!

This worked perfectly fine for me, didn't filed much, just put some WD-40. All the information were really useful on a North American K-50

Thanks so much. Worked for me!

thank thats helps me to fix my friend's camera

Thanks man, you saved my camera. This is genious. Worked for me perfectly so far. I hope it won't happen again...

I did the same you did and i guess it worked. However now i got the Error message "F--" which seems like the glass isn´t recognized. Anyone know a fix for this?

Thanks man, sadly my K-70 is also having this issue and it's just one month out of warranty. I'll try to fix it with your instructions

So you are saying that the aperture control arm inside the camera mount raises up too high causing the lens to stop down too far?

30k views of people willing do diy repair them. wonder how many really have this problem. its the second time my K30 broke. first time was a mirror flop issue (within warranty). thank you for the video!

Good fix, I filed the ends of the horseshoe in the way you showed and put it back together. I tried some recipes for cycling the shutter and it worked for a minute but didn't stay fixed. Instead of taping screws to a picture of the camera, I printed out pictures of the camera as I went and poked the screws in holes in the printed picture.

Could anyone please explain why, if the aperture arm in the camera is not working, the images are dark, under exposed, and not over exposed? When you insert the lens onto the camera the aperture is made to be wide open at it's largest opening, regardless of the lens or lens setting, "A", aperture # other than "A". or newer lens with no aperture ring (same as "A"). So when you take an image the arm in the camera body goes up, either all the way, or a lesser precise travel to control the aperture opening to let the spring in the lens stop the aperture down. Therefore if the camera aperture arm is stuck the lens will remain wide open, not close down all the way to result in a dark image. If the arm was stuck in an up position it would be immediately obvious when you look through a very dim viewfinder, yes? I am completely confused by this issue.

If this is such a common problem with K50, K30, K500, why hasn't there been a class action lawsuit? not worth it?

Another hack (without opening the camera) to get this fixed. It works for me on my K-30 1. Go to Menu > keep pressing the right on the 4-way button until you see the "spanner" icon > Go to 3 > Dust Removal > Select both Startup Action and Shutdown Action 2. Now switch off and ON. You will notice the camera stutters every time you off or on the camera 3. Go to Home and press the right 4 way key (timer icon) > Choose Continuous Shooting (Lo) and press and holder picture shooter button to continuously shoot pictures 4. Now choose Continuous Shooting (Hi) and take continuous pictures By now the aperture would have set and issue resolved. Again works for me.

Many thanks, worked perfectly on my K30. I wrote a small tutorial (in Italian) here: www.gustavocevolani.it/personale/fotografia/pentaxk30.html

Hi, I had the same problem, but used "Continuous shooting-Hi" for a few seconds; that fixed the problem, but ofcourse I do not know how long this will last. But it is worth a try, before taking the camera apart.

Awesome, thanks for sharing this, this worked great !!! Sanded down the horseshoe magnet, wiped it down with isopropyl alcohol and my K-50 is back in action.

Worked for me! Instead of using sandpaper, I used a small file and chamfered the horseshoe exactly like the sketch. Thank you very much for making this video!

Thanks for posting the video I have a K30 that acts up once in a while. I'm going to give this a try.

It works! I have a K30 model, so i had to find an extra movie with the cover dissasembly, but the repair itself really works. I am afraid of using WD 40 or other greasystuff inside the camera, i have used the 2500 sand paper. Thanks for sharing your experience and expertise.

This other method worked for my camera, they don't like not being used for extended periods and the aperture motor sticks. 1.) Go to the camera menu to button customization and define the raw/FX button to "optical preview". 2.) Use Manual or AV mode and dial in an aperture other than open wide. 3.) Press the raw/FX button 10 to 20 times ( I did so). Every press you should hear the aperture lever working. 4.) Take some shots. At this point my K-30 did correct exposures with some exceptions. So I repeated the procedure until no wrong exposure occurred. You may have to repeat several times. Good luck!!!

From the comments section, it seems that this works well, so hopefully I can do this.

I just had to have my k30 fixed in Ontario, the problem was just what you are fixing yourself . I was charged 270 dollars . I was given a deal , 230 dollars . Not cheap . Im not mechanically minded or I could have saved all that cash .

Before you take your camera apart, put your camera on continuous shooting and just go for it, not saying it will work for you, but it certainly unstuck mine. good luck.

Hello, To change the LCD screen is the same process (To open the camera)

My sister gave me a pentax k500 (shoots black pictures). They were about to dispose this garbage of a camera but i said to them that just give me the camera and i might try to fix it. then i found this video. Got my self a free working camera 😂😂 thank you for the guide sir.

Thanks heaps mbs tv for your video. I did not sand the horseshoe, I just cleaned it with the isopropyl alcohol and it works!!!!! Thank you a lot, you saved me $800 for new camera:-)

Thank you so much for making this video. You gave me the confidence to do the same repair to my own K50, and it worked! Great job 😁

Please can you help me do I need to solder/unsolder anything to get the horseshoe? Or do I just put it out and put it back in.

Thank you for this tutorial My K500 was dead, taking dark pictures. Now it's working again. I use a sandpaper and isopropilic alcohol to clean it, and worked perfectly!

Awesome I fixed mine. Pentax quoted me £180(250$)

Thank you! My K-30 is working again :)