[ronald]

All over this forum people write about choosing aperture speeds like 1/25th and 1/50th when shooting video on a K-x.

I own a K-x and I do not see those f-stops.

What I see is 1/15, 1/20, 1/30, 1/45, 1/60 etc.

It is not really a problem. I choose either 1/45 or 1/60 for video to get as close to 180 degree shutter. I am just wondering why everyone else seems to be able to choose eg. 1/50..?

Can someone explain it for me?

/Ronald

[Parallax]

You have confused aperture/f stops with shutter speed. 1/125, 1/60, etc., are shutter speeds, not f stops. I don't have a Kx, but with most cameras, if you are using aperture priority the camera is able to select more shutter speeds than what you can select in Manual or Shutter Priority mode.

[ronald]

Sorry..

I am only talking about shutter speeds that you can select in P mode, before locking ISO and dialing to movie mode.

I only see is 1/15, 1/20, 1/30, 1/45, 1/60 etc.

But I often see people talking about selecting 1/50 and 1/25.?

[ronald]

Thanks, TheoSixx.

I am living in Denmark (Europe). So I guess I am from 'Abroad' and therefore I should have the PAL version, if such different versions exists..

But my video is shot at 24 fps, and I can only select 1/15, 1/20, 1/30, 1/45, 1/60 etc. as mentioned above..?

[ronald]

Thanks for your opinion on that, TheoSixx. You may be right, but I am a novice and not the one to judge on that.

I do not believe in Santa Claus, but I do believe, that frames without motion blur gets me closer to a cinematic look that I am after. I have no experience with 'Washing' the frames. That sounds like an interesting technique.

But with all that said, my question is still unanswered:

Why does some people refer to selecting 1/50 and 1/25 in P mode, when I am only able to select 1/15, 1/20, 1/30, 1/45, 1/60 etc.?

[vanakaru]

This is strange. I can choose 1/15, 1/20, 1/25, 1/30, 1/40, 1/50, 1/60, 1/80, 1/100 depending what aperture I choose and how much light I have with Pentax 16-45. And 1/15, 1/20, 1/25, 1/30, 1/40, 1/60 with Pentax 55-300.
I have a feeling that the increments depend of the light and specific lens aperture structure. Moreover I have doubts if that translates to fps actually in any way. I think that the camera will sustain the frame rate regardless of shutter speed by compensating in other parameters when lower SP is needed(or chosen).

[vanakaru]

I believe this is due to the difference in VIDEO STANDARDS

I don't! Because you are setting up in P mode that has nothing to do video PAL or NTSC.

[Parallax]

We're in the VIDEO forum.

Original post was about frame rates, in VIDEO.

"P" stands for 'Priority' mode. Right? That's STILL photography.

So, therein lies the rub; ..........................

Actually, the rub is that the original question was about shutter speed in "P" mode, not frame rate. ("P" stands for "Program Mode", BTW)

I am only talking about shutter speeds that you can select in P mode, before locking ISO and dialing to movie mode.

Your responses have dealt with frame rates. Other than the fact that shutter speed obviously has to be faster than frame rate, I don't believe they have anything to do with each other.

.

[TheoSixx]

this is about trying to get 180° shutter angle affect when shooting video.
not what you're talking about parallax.


this thread is in the "Pentax Video Forum"

[ronald]

I am talking about the well known and often discussed MOVIE technique, where you trick the Pentax K-x to maintain ISO and shutter speed in video mode, by fist choosing P mode and locking the shutter speed before dialing to video mode.

My question is: Some people talk about selecting 1/50 and 1/25. But I can only select 1/15, 1/20, 1/30, 1/45, 1/60 etc. no matter what lens I am using..?

Is there a difference between european models ann US/asian models regarding shutter speeds..?

[vanakaru]

I do not think so. As much I understand the video RECORDED is neither PAL or NTSC. It is JPG square pixels. All that talk about frame rates related to these two TELEVISION systems may be irrelevant. With K-5 PAL/NTSC becomes up only when viewing on TV via HDMI cable. Not when recording video that will be done in frame rate you choose - 25, 30.
So I do not know why you can not see these shutter speed steps. I can with my K-5, but depending of the light and other settings like ISO and aperture and the lens I am using.

[TheoSixx]

I am talking about the well known and often discussed MOVIE technique, where you trick the Pentax K-x to maintain ISO and shutter speed in video mode, by fist choosing P mode and locking the shutter speed before dialing to video mode.

My question is: Some people talk about selecting 1/50 and 1/25. But I can only select 1/15, 1/20, 1/30, 1/45, 1/60 etc. no matter what lens I am using..?

Is there a difference between european models ann US/asian models regarding shutter speeds..?

don't know, can't say

i did see in the SPECIFICATIONS it notes this:

Shutter Electronically controlled vertical-run focal plane shutter

Shutter Speed • 30 to 1/6000 sec* • Bulb

PENTAX K-x movie recording function: Widescreen HD movie recording at 1280x720 pixels at a cinematic 24 frames per second (720p24)

Good luck in your quest.

[ronald]

Hmm maybe I should just leave this little question unsolved, as itis not because it is of any real problem to me.

BTW: Could someone tell me what 'washing' the frames in editing means (as TheoSixx mentions above).?

[ronald]

Thanks The. I know creative Cow, it is a great website.

[youyou]

This might have to do with how you have set the increments of your dials. E.g. 1/3 per step or 1/2 per step.

Like with ISO if it is set to 1/3 you can select values like ISO 320, 640, 1000, etc. besides the normal values like 200, 400, 800, etc.

Same applies for appertures like 3.2 and 6.3. By choosing a different 'step-size' you might be able to select those 'in between' shutterspeeds as well.

I own a K5 (formerly a K20d) so I don't know where to find this in the menu on the Kx but it should be mentioned in the manual.