230 degree shutter

Post by **Angus** » Tue May 20, 2003 1:33 pm

Even a 200 degree shutter can produce some blurring, depending on the speed of the object you are filming.

I find the 150 degree shutter in my Chinon 1200SM produces *very* sharp images, even of racing cars. It's nice to have several cameras with different shutter angles

Post by **dantheman** » Tue May 20, 2003 3:30 pm

Heya,

That's exactly the effect I was looking for: blurring. Does anyone have any experience (intentional or unintentional) of heightening this effect. Obviously, fast movement helps and a low fps...anything else
Best
Daniel

Post by **S8 Booster** » Tue May 20, 2003 3:31 pm

LCD shutter - it is basically there already:

Fast Switching Liquid Crystal Shutters

LCS2-G
* Active area 25.5mm x 25.5mm
* Ferroelectric Liquid Crystal (FLC)
* Contrast ratio >1000:1
* Transmission 80%

Dyed Guest Host Shutters
* Full grey scale capability
* Uses dyed guest host technology
* Dichroic black dye
* Suitable for small pixel size applications

Nematic Shutters and Variable Retarders
* Millisecond switching times
* Nematic liquid crystal shutters
* Allow non symmetrical ON and OFF periods
* Contrast ratio >1000:1

R

Post by **Mikael** » Tue May 20, 2003 6:49 pm

The Canon 1014 Electronic has a 37.5 degree shutter angle setting.

Some of the variable shutter cameras go down to fully closed.
Beaulieu 4008 series does, and could be taped if you wanted an extremely small shutterangle/short shutter time. You just put a piece of tape over the shutter-lever to keep it where you want it. (Otherwise it stays in fully opened, half or closed position.)
Exposing right not knowing the exact angle of the shutter is a problem.
If the electronics in the camera can take care of that, I sure donÃ‚Â´t know.

Post by **Mikael** » Tue May 20, 2003 7:00 pm

BTW, my old "Beaulieu" 1008xl has a 225Ã‚Â° shutter. Blurs easily when doing pans.

Post by **S8 Booster** » Wed May 21, 2003 12:19 am

dantheman wrote:Heya,

That's exactly the effect I was looking for: blurring. Does anyone have any experience (intentional or unintentional) of heightening this effect. Obviously, fast movement helps and a low fps...anything else
Best
Daniel

18 fps with a XL 220 shutter blurs extensively even with quite smooth camera pans or object motion.

R

Post by **filmman35** » Wed May 21, 2003 1:35 am

>BTW, my old "Beaulieu" 1008xl has a 225Ã‚Â° shutter. Blurs easily when >doing pans.

What is the normal shutter angles on the other non-XL Beaulieu cameras like the 4008, 6008, etc? (What I mean by "normal" is their widest opening?)

Just wondering.

Richard

Post by **Cranium** » Wed May 21, 2003 8:44 am

S8 Booster-
Alas, even with that one you'd be losing at least 20% of your available light.
But I've always thought a crystal shutter would be the way to go. One less thing going "clickity clack" inside the box.

Post by **S8 Booster** » Wed May 21, 2003 9:48 am

I know but the basic technology is there and may be improved or re-developed for this particular purpose = less light loss.
Anyway, many high end S8 cams (Sample: Canon 1014/814XL-S and Nikon R10) use 2 prisms/beam splitters (One for viewing and one for precision light metering / exposure control) in series in the light path so the difference in light transfer between those S8 cams and a LCD shutter cam will not be too big? And the total flexibility of (Auto) variable shutter speeds will easily compensate for the loss in low light conditions.

Technically this thing can eliminate the aperture - all solved by shutter speed variation! DOF control may require aperture control though.

R

Post by **S8 Booster** » Wed May 21, 2003 9:51 am

filmman35 wrote:>BTW, my old "Beaulieu" 1008xl has a 225Ã‚Â° shutter. Blurs easily when >doing pans.

What is the normal shutter angles on the other non-XL Beaulieu cameras like the 4008, 6008, etc? (What I mean by "normal" is their widest opening?)

Just wondering.

Richard

For the 4008 and 5008 you will find the data in the table on previous page.
And here is for the 6008 - 7008:
http://jl-site.com/Super8/ShuterSpeed.html

R