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Forum: Pentax K-3 III
06-18-2021, 02:53 AM
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These threads about the K-3III blur are full of people claiming
That doesn't mean anything and we should expect people to know this. These kinds of issues happen in some use cases and with some combinations of gear or settings. The horizon correction issue has been narrowed down and identified though the work and discussions of users. The more general issue with blur is still unresolved but has been identified by several people.
The problem could of course be similar to the horizon correction issue or it could be traditional shutter shock. Regardless it appears to affect some users. An issue like this can be a huge problem if it affects you main use case. Pretending it's irrelevant or can be easily worked around just shows ignorance about people using their cameras in different ways. It can make the camera useless for some.
Sinbad1 it would, as many others have pointed out, be helpful to know your shutter speeds since normal shutter shock is generally shutter speed dependent. The iso setting is unlikely to affect the sharpness unless there's some very strange bug in the K-3III firmware.
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Forum: Pentax SLR Lens Discussion
12-13-2020, 02:35 PM
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First tests with all these lenses :
(no focus error for the Takumar : it was dirty in liveview too)
Considering these results (that confirm previous tests of Samyang vs. Takumar), I would say that if you are searching for the :
- best compromise all included and cheapest lens : Samyang 14/2.8
- best 14-15mm : Irix 15/2.4 (more constant than Samyang)
- best with unlimited budget : Irix 11 (widest) + 15 (brighter, filters)
- widest lens : Irix 11/4 validated for me
- best on Spotmatic : Takumar 15/3.5 (only lens available on M42)
- UWA with filter thread : Irix 15/2.4 (95mm filters)
- best construction quality : Takumar >> Samyang >> Irix (full metal >> plastic with smooth focusing ring >> all plastic with "plastic feeling/no feeling" focusing ring)
Note on Irix 11/4 : of course we can have better lens... but my specification sheet was to have the widest rectilinear lens in M42/K/EF mount for lets say, under 700 EUR.
The distorsion of the Laowa 15/4 is a no-go for me (if I have to process each picture, I can also take a fish-eye lens...)
The Laowa 12/2.8 zero-D is too expensive
Canon lenses are too expensive
Samyang XP lenses (10/3.5 and 14/2.4) are too expensive
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Forum: Pentax SLR Lens Discussion
11-10-2020, 12:37 PM
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I know.. old thread.. but other people will land here with the same issue... so:
#1. Remove rubber grip from focus ring
#2. Line up holes in the focus ring (that are now visible) with the small screws below (screws secure lens hood)
#3. Remove lens hood
#4. Between focus ring and lens body, you can see three screws that retain the focus ring. Seen from the top and about 2" down alongside the lens body. These have become loose, allowing the focus ring to rotate freely.
#5. Tighten them down carefully, ensuring that the infinity/focus marks align properly.
#6. Replace lens hood and rubber grip.
Done and dusted.
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Forum: Repairs and Warranty Service
08-02-2020, 10:15 AM
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The upload function of the forum is broken from my side. I have tried to upload several times, and the I almost reached the quota limit.
So I have all pictures here https://postimg.cc/gallery/LLrTGqW.
The images, in order:
00. The original lens
01. Now with the hood and lens filter removed. You see the name ring on the top
02. Now the lens with its name ring removed
03. Same as 02 picture, from another view. You see there are 3 screws which is used to fix
a protector ring. This ring is seen on the pictures 06 and 08.
I created the marker atop, very next to the screw. Which isn't really necessary though.
You will see the marker in the 05 picture. (The marker must be removed when you finish)
05, 06, 07, 08.
Now how it's after the protector ring unscrew/removed. At this step, it's very safe. You can even
attach the lens to your camera body, and give some tests :P That's because core component (glasses)
are actually fixed by 3 other crews (you see that these screws attach the aluminum ring (it's not a ring
actually; it's just a ring on the picture). Let's name them internal body screws (sorry, I don't know the name)
Now, to fix you problem, rotate the focus ring until you reach the infinity mark
(seen on the 07 picture). Then loosen the internal body screws a little bit, and shift the core component
a little bit, and then unloosen the screws. (or not, it's up to you). At the same time, attach the lens
to the body, and take any picture for testing.
Repeat the step until you think the issue is fixed. unloosen the internal body screws, and enjoy.
---------- Post added 08-03-20 at 12:48 AM ----------
PS: If you are not sure, remember to create some marks (as I created on the picture 05), however, for the internal body screws. If these screws are loosen and the core component is rotated too much / a bit far from its original position, it's nightmare, as it's very very hard to correct them: The core component must be aligned well at two positions (infinity and nearest position) of the focus ring.
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Forum: Pentax News and Rumors
10-31-2020, 02:44 AM
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Forum: Pentax News and Rumors
11-01-2020, 09:38 PM
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Forum: Repairs and Warranty Service
07-29-2020, 10:15 AM
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Hi FotoPete, I'm sorry for my late response. I just didn't check my email box often.
Let me share my story first.
I used to disassemble a few lenses (Some M42 / Manual Pentax lenses). And also Pentax zoom lens 18-55mm which was already a bit broken before I played with it. Yeah it's few years ago already. I even learnt how to short lens contacts, to trick the body to see some M42 lens as an A lens (Kr: short contacts to change aperture when using M42 lens ? - Page 2 - PentaxForums.com)
That meant, I actually practiced quite a lot before going with my Pentax 43 mm. I intended to send the lens to some repairing service, however it's not such one in Berlin, and sending the lens a few hundreds miles to another city, is quite risky. So I decided to convert the lens to a MF lens -- the AF feature for my 43mm wasn't so awesome, so why not just remove it?
The good news that I know is the design of Pentax lens is quite simple. It's even simpler than some MF lenses that I've known. So I was very confident. In my first attempt, I failed to remove the rear part (with a few contacts used by AF system): The cause was that I didn't have the right/strong screwdriver. Then I spent quite a lot of time waiting and searching for the one: I finally found one from OBI baumarkt in Berlin ( OBI Baumarkt & Online-Shop - alles für Heim, Haus, Garten und Bau ). I didn't try to buy one from online shop: it's easy to get a wrong one again;)
Then, on my second attempt, everything was perfect. You know what, the most challenging thing is to remove the name ring (the front ring, with all text about your lens). Sometimes you have to use a very special tool: But I was lucky with my hands. Once again, Pentax lens is very awesome because it's very easy to play with it.
In my case, I had to disassemble the lens from both sides: front part, and rear part. I then removed the AF gear and shaft. Then I assembled them. Well, once again, this was also very challenging because I didn't know anything about this 43mm lens structure before. On my 3rd attempt, I could make correct tuning for the focus ring. Except for the AF function, the lens now works identically as before.
Now, back to your issue, and your question. First question first: Are you pretty sure that's a mechanical issue? I meant, do you really think that just small tuning for the ring will help?
If yes, then welcome. You can fix that. And you only need to play with the front part of the lens. The rear part has a lot of tiny stuff and if you are not carefully enough you can easily break and/or lost them on the floor / carpet. ^^
How? Quite easy (but, here my instructions without any warranty: it really depends on your tools and some skills :D)
0. Requisite: Buy/Get the right/strong screwdriver
1. Open the name ring, which you can already try to do it now. If you can't open the name ring with your hand, you can try it another time. It's that pressing the ring with two fingers a bit strong, and then rotate the ring (counter)clockwise (hey, you would need to rotate in both redirections a bit, so it can be loosen easily.) Please don't rush, try that today. Try again another day, until you can open that.
1b. If you can't do that with your hands/fingers, please stop and buy some special tools, and/or look for some instructions already on the internet. There are a few tricks to do that. Please keep in mind that the name ring is very beautiful: Don't use any mechanical tool against it please :P
2. Open the front parts -- well, I don't have any pictures now, as I didn't think that's useful for anyone. Looked like I was wrong:P
3. Fix the focus ring. Quite easy I would show you then.
Well, I have a few days off this week, and I will disassemble the lens probably on this Saturday, take some pictures, and send to you.
So, stay tuned.
PS: I have a plan to fix my lens AF gear/shaft. However I really need some very strong glue that can deal with cooper gear. Do you know one?
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Forum: Repairs and Warranty Service
06-26-2020, 03:01 AM
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I fixed that myself. I can use the lens as a MF lens now, as you can see from the image , I removed the AF gear and its shaft. The gear was a bit broken.
The AF function of a 43mm is not so awesome to me anyway ;)
---------- Post added 06-26-20 at 05:06 PM ----------
Fyi, I used a PH00 screwdriver
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Forum: Sold Items
03-23-2011, 04:06 AM
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Free bump for a good looking camera.
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