Auto Iris Level (what it does??)
- Thread starter al
- Start date
Z
Zoomforce
Guest
Re: Auto Iris Level (what it does??)
auto iris controls your exposure, if you set it to -3 it will underexpose each shot by -3f.
I do not recommend using auto iris, as the shift is very noticeable and sometimes is unpleasant.
auto iris controls your exposure, if you set it to -3 it will underexpose each shot by -3f.
I do not recommend using auto iris, as the shift is very noticeable and sometimes is unpleasant.
G
Guest
Guest
Re: Auto Iris Level (what it does??)
sorry what it means: "it will underexpose each shot by -3f. "
it means 3 stops ??? (ex. 2,8 to 8???) or what???
thanks
alvaro
sorry what it means: "it will underexpose each shot by -3f. "
it means 3 stops ??? (ex. 2,8 to 8???) or what???
thanks
alvaro
J.R. Hudson
Spirit Animal
Re: Auto Iris Level (what it does??)
I use AUTO IRIS only once when setting up a shot. Then, I shut it down and adjust the shot more to my liking. Usually down.
I use AUTO IRIS only once when setting up a shot. Then, I shut it down and adjust the shot more to my liking. Usually down.
J.R. Hudson
Spirit Animal
Re: Auto Iris Level (what it does??)
I didn't know. Thanks!
I didn't know. Thanks!
Z
Zoomforce
Guest
Re: Auto Iris Level (what it does??)
sorry I forgot to put a space between the -3 and the f. each step on auto iris is actually 1/3 a stop, not 1/2. So -3 is one full stop down. Thats why you will ususally see people recommending using -3, or one full stop to underexpose, as it helps prevent the DVX's pickups to become oversaturated.
sorry I forgot to put a space between the -3 and the f. each step on auto iris is actually 1/3 a stop, not 1/2. So -3 is one full stop down. Thats why you will ususally see people recommending using -3, or one full stop to underexpose, as it helps prevent the DVX's pickups to become oversaturated.
Barry_Green
Moderator
Re: Auto Iris Level (what it does??)
Underexposing in video is one of the little secrets that can really give you a richer look. Plus on the DVX, with CineGamma, underexposing gives you a little bit of ceiling protection before your highlights blow out.
Video is basically akin to reversal film, in that both are recording a positive image, and a little bit of underexposure helps bring out saturated colors in both. When shooting negative film we would actually tend to overexpose, maybe a half-stop on average -- but with reversal (and video) I like to shoot 1/3 to 1/2 under.
Underexposing in video is one of the little secrets that can really give you a richer look. Plus on the DVX, with CineGamma, underexposing gives you a little bit of ceiling protection before your highlights blow out.
Video is basically akin to reversal film, in that both are recording a positive image, and a little bit of underexposure helps bring out saturated colors in both. When shooting negative film we would actually tend to overexpose, maybe a half-stop on average -- but with reversal (and video) I like to shoot 1/3 to 1/2 under.
Re: Auto Iris Level (what it does??)
..do you have auto iris turned on? if not than your auto iris setting wont make a difference. if so than you should notice a differnece in exposure levels beteween -3 and +3 ..
if its hard for you to tell the difference between settings, you could set it to one(-3) and turn auto iris on , and roll tape, then stop and set it to the other(+3) and roll tape. all without moving the camera or changing the lighting .when you play the tape back it will be easier for you to see the jump in exposure when it instantly goes from one to the other.
..do you have auto iris turned on? if not than your auto iris setting wont make a difference. if so than you should notice a differnece in exposure levels beteween -3 and +3 ..
if its hard for you to tell the difference between settings, you could set it to one(-3) and turn auto iris on , and roll tape, then stop and set it to the other(+3) and roll tape. all without moving the camera or changing the lighting .when you play the tape back it will be easier for you to see the jump in exposure when it instantly goes from one to the other.