35mm adapters max f-stop.

snodart

snodart

Veteran
[SIZE=+0]My experience has been that f/5.6 is about as high as I can go with the 35mm lens before the grain in the GG (vibrating) starts to show up. This is especially true with any camera movement against a light background. With a still shot, I can take it a little higher, but not much. I was just curious how high of an f-stop number some of you have been able to achieve with the various adapters... before the GG grain starts to show up. [/SIZE]

Thanks
 
PaPa said:
u, ive gone to about 27
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Not that I don't believe you, but I don't see how it could be possible. I would love to know more details.

EDIT: unless you have the M2 that is
 
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F 16
with both Go35 and SGpro.

(F22 on the Sgpro with a 200mm lens.)


you just need lots of light. as long as the GG is being illuminated properly, there will be no static grain.
 
I am truly surprised by all of this. I understand the "lots of light" idea, but how much light are we talking? For example, on a slightly overcast day during mid-day, do you still need to add lights? I understand that that is not a very specific question, but I'm looking for something just to give me an idea.

With minimal lighting, do these adapters show grain. In other words, without enough light, does the grain show up?

Thanks.
 
Yardsale said:
I have ordered a M2, this shouldn't be a problem for me :D
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You are right, two months from now when you get it you will be good to go. :)

Only kidding, I'm thinking pretty seriously about getting one as well.

Policar said:
G35 beta unit.

f1.4 (minor grain at 2.0, totally unusable at 4.0)

Believe it.
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That sounds pretty rough, but I do believe it.

Also, are these claims of grain free images with the camera stationary or in motion? Motion (especially across the sky or a light background) seems to reveal the grain (or the pattern that the grain is making from being vibrated or rotated).
 
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it depends on the gg setup and how much light you have. overcast midday with the ND filters off and the dvx at wide you can probably hit F8.0 withot trouble on a sgpro or m2. on a g35 or go35 you have to leave it wider. like F 2.8 or less.

hence why spinning gg is my personal fav. it helps eliminte grain.
 
TimurCivan said:
it depends on the gg setup and how much light you have. overcast midday with the ND filters off and the dvx at wide you can probably hit F8.0 withot trouble on a sgpro or m2. on a g35 or go35 you have to leave it wider. like F 2.8 or less.

hence why spinning gg is my personal fav. it helps eliminte grain.
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That sounds more realistic to me. I agree that spinning seems to hide the grain much better.

guskersthecat said:
In proper light, the Brevis will do f16 no problem. I don't believe any DP would do that though :-)
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That sounds pretty impressive. Yea, I'm not sure it would be used all that often, but still impressive.

Thanks for the info all.

Is anybody using the new Cinescreen (a.k.a. M3) with their M2? According to their website and this clip...

http://www.redrockmicro.com/footage/misc/aperture_test.mov

...there is no problem at any aperture/shutter speed combo. I would love to know that the heck the Cinescreen is made from or where I could get my grimy hands on one.
 
guskersthecat said:
In proper light, the Brevis will do f16 no problem. I don't believe any DP would do that though :-)
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well actually F16 is very useable. Because F16 is a relative apeture to the focallength of the lens your using. F16 on a 55mm F1.2 lens is NOT the same as F16 on a 200mm F4 lens.

The Dof at F16 on my Canon F1.4 50mm lens is still provides a relatively Shallow Dof if the actor is close up. ITs specifically usefull when you have two actors ( in adequate lighting of course) a few feet apart, and you want both of them in sharp focus, but hte back ground out of focus. F16 on a 35mm lens isnt really as Deep as the F16 on a 1/3ccd video camera. it is deeper, but not nearly as pronounced.

It only gets that infininte DOF look if thet subjects are morte than 10 feet from the camera.

of course this all depends on the specific lens used, and the subjects relative distance to the background.
 
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