Gain question

[combatentropy]

When shooting a shutter speed of 1/24
(not just 24 fps, but 1/24 sec. shutter)
can you raise the gain at least to 12 dB,
or is it stuck at 0 dB?

The brochure says that you cannot raise the gain past 0 dB while shooting in slow-shutter mode (I don't know why). The question is, is 1/24 a "slow shutter speed"? The brochure lists only 1/30 and 1/15 as slow shutters, but I just wanted to make sure.

I think that 1/24 and + 12 dB would be useful sometimes.
Since this camera's gain is so clean, I would even use 1/24 and +18 dB, but the brochure says that in 24p you can raise the gain to only + 12 dB (again, don't know why).

 

[Peter Mosiman]

i just got out of class where we learned all about this...minus the gain bit.

let me get this straight. you are undercranking and shooting at 12fps?
i would assume that 1/24 is a "slow shutter speed" because anything under 1/48 is considered undercranking and that means that your shutter is going to spin slower, where as if you were shooting at 1/60 or 1/120, your shutter would have to be spinning faster.

i hope im right or else i didnt learn anything hahaha. (well i learned, just got a brain spanking)
dont even think i answered your question. just kinda rambled, sorry.

 

[Luis Caffesse]

let me get this straight. you are undercranking and shooting at 12fps?

Slow shutter speed does not equal 'undercranking.'
"undercranking" refers to the framerate.
In this case you would still shooting 24 frames per second, only the shutter is running slower than "normal."

 

[Peter Mosiman]

that makes a world of sense Luis.
thanks.

what does that do to the picture?

 

[Luis Caffesse]

Well, I don't want to totally hijack this thread (seeing as the original question was about gain) -

With a slower shutter speed you are increasing the amount of time each frame is 'exposed.'
The longer the time, the more light (which is why 1/24th can be helpful sometimes in low light scenarios).
However, more time per frame also gives you more motion blur.
Sometimes that can be a desired look, and sometimes it can simply be used out of necessity to get the extra bump in exposure.


Hopefully someone with some experience using the HMC150 can answer the gain question.
Unfortunately I haven't seen the camera myself yet.

 

[combatentropy]

I just wanted someone who owns one of these things to set it to 24p, 1/24 of a second, and see how high they can dial up the gain.

I don't own one, otherwise I'd do it myself. I was just curious.

 

[Bucknfl]

I just wanted someone who owns one of these things to set it to 24p, 1/24 of a second, and see how high they can dial up the gain.

I don't own one, otherwise I'd do it myself. I was just curious.

12db

 

[combatentropy]

Merci.