Reflex shutter angles

[Bryce Lansing]

I have a Bolex H16 Reflex with a variable shutter, and I wanted to know the exact shutter angles so I can set them in my meter when I shoot. I'm aware of the 1/3 stop stolen from the prism, but I'd rather set my meter to the exact shutter angle, then subtract the 1/3 stop myself (opposed to using the adapted shutter angles to compensate for the 1/3 stop).

 

I read that the shutter angle for the H16 reflex is 133 degrees. Is that right? What about the shutter angles at 1/2, 1, and 2?

[Boris Belay]

I have a Bolex H16 Reflex with a variable shutter, and I wanted to know the exact shutter angles so I can set them in my meter when I shoot. I'm aware of the 1/3 stop stolen from the prism, but I'd rather set my meter to the exact shutter angle, then subtract the 1/3 stop myself (opposed to using the adapted shutter angles to compensate for the 1/3 stop).

 

I read that the shutter angle for the H16 reflex is 133 degrees. Is that right? What about the shutter angles at 1/2, 1, and 2?

 

The manual is quite useful in this respect : do you have one ? Otherwise, there is also this website :

http://www.city-net.com/~fodder/bolex/shutter.html

[Chris Millar]

I have a Bolex H16 Reflex with a variable shutter, and I wanted to know the exact shutter angles so I can set them in my meter when I shoot. I'm aware of the 1/3 stop stolen from the prism, but I'd rather set my meter to the exact shutter angle, then subtract the 1/3 stop myself (opposed to using the adapted shutter angles to compensate for the 1/3 stop).

 

I read that the shutter angle for the H16 reflex is 133 degrees. Is that right? What about the shutter angles at 1/2, 1, and 2?

 

 

1/2, 1, and 2 refer to the amount of stops of light the shutter is not allowing to hit the film compared to the 133deg angle - '1' is therefore 66.5deg and '2' is 33.25deg - 1/2 I dont have the right calculators here to work out (log₂) - I dunno, take a stab at 100deg :lol:

[Bryce Lansing]

1/2, 1, and 2 refer to the amount of stops of light the shutter is not allowing to hit the film compared to the 133deg angle - '1' is therefore 66.5deg and '2' is 33.25deg - 1/2 I dont have the right calculators here to work out (log₂) - I dunno, take a stab at 100deg :lol:

 

Ok that makes sense, thanks! But what I'm confused about is how the above link lists 1/2 as 65 degrees, and 1 at 32 degrees. Does the 1/2 mark then represent 1/4, then the 1 mark represents 1/2, and the 2 mark represents 1?

[Chris Millar]

That website is wrong