SGpro Rev3 Sky 120Shutter

[Bertholt4]

Is it normal that I can see the spinning disc when filming sky with 12oer shutterspeed and sgpro, (I think the batteries are full)?

[marco0782]

What is your shutter speed? 1/120, 120-degrees, or something else?

[Bertholt4]

1/120 second.

[Hans Moleman]

a lot of adapters' ground glasses become visible at higher shutterspeeds. though, how stopped down is our 35mm lens? that could contribute.

[Wayne Kinney]

Bright sky's are the biggest challange for an adapter regarding grain.

What lens are you using, and what is the aperture setting?

[cinebuddy]

To piggy-back off of Wayne I try to avoid putting my adapter in a situation where grain is visible. As wanderful as these adapters are there are limitations so if you see the gg at 1/120th...don't use that shutter. I know it may be contrary to your artistic choice, but to get a grainless shot you may have to compromise.

[Dennis Wood]

I would think most spinners should be ok at 1/120s. Sounds like wide angle with a small aperture?

[Wayne Kinney]

Yes, it is really a combination of shutter speed and 35mm lens aperture.

[Oedipax]

Hmm. I shot some 1/120 footage with the SGPro on my DVX and didn't have any problems at all, but granted my aperture was something like f/2 or 2.8. I was shooting some 60i footage for slow motion in post.

[Dennis Wood]

The grain masking issue is one that affects every adapter out there...spinning or not. I do most of our grain testing with snow as a background (not hard to go here) which is likely the toughest test. Stop a lens down enough in that situation (worse with wider angles) and grain even on a very fast spinning adapter will be very evident. The only way to avoid it is to make some serous bokeh compromises.

[Bertholt4]

Thanks for clearing up, And Yes it was a Wide - 28mm Nikkor but aperture was not fully wide open. Have to test a little bit more.

[Wayne Kinney]

I do most of our grain testing with snow as a background (not hard to go here) which is likely the toughest test.

Hehe, I forget how cold it must be there in Canada. Do you get a lot of Kinney's near you? My Grandfather, god rest his soul, was Canadian and moved to the UK during the 2nd world war, so I have Canadian blood! In fact he was a mounty for some time. My surname is very rare in the UK.

Bertholt4, would be nice to see some of your tests!

[Dennis Wood]

Jeeps, I think there's a shoe store with that name around the corner :-) WWII brought many war brides here from the UK, and you'd have to figure many Canuck grooms just stayed put too!

[Inoran]

why do you need a 35mm adapter for the sky?