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-   Canon XL H Series HDV Camcorders (https://www.dvinfo.net/forum/canon-xl-h-series-hdv-camcorders/)
-   -   IRIS steps (https://www.dvinfo.net/forum/canon-xl-h-series-hdv-camcorders/51320-iris-steps.html)

Frederic Segard September 18th, 2005 06:44 PM

IRIS steps
 
I hope there are going to be more steps for iris control then the XL1s. Not sure about the XL2, but I find the stepping when opening and closing the iris quite annoying.

Chris Hurd September 19th, 2005 01:12 AM

I can tell you it stops down to f/9.5 before closing completely. Whether more discrete steps have been added in between, I'm not sure.

James Emory September 19th, 2005 03:22 AM

I noticed that the wheel is back on the H1 instead of the lever on the XL-2. That's good.

Jacques Mersereau September 19th, 2005 07:10 AM

One of the things we asked Canon to do was provide a smooth iris
tranistion. Obvious image changes caused by stepping are a
'prosumer' alert and hard to edit around.

James Emory September 19th, 2005 07:14 AM

Well, if it's anything like the XL-1/s, then it still has steps however subtle. Why can't it just be a free moving wheel, the way it should be?

Jacques Mersereau September 19th, 2005 07:31 AM

That was requested along with HD-SDI. At least they got that right,
but I hope the wheel is like the ring on a pro rig.

Chris Hurd September 19th, 2005 08:20 AM

Sorry but it is not an analog ring. It's a wheel with a discrete number of contacts.

Jacques Mersereau September 19th, 2005 08:24 AM

Hey Chris,

So it's the same as the XL1 and you see the iris changes
with each click?

Chris Hurd September 19th, 2005 08:36 AM

Yes that's right Jacques. If there's any improvement here, I'm thinking that it would be the same number of steps as before, but since the f/stop range is not as broad as before that means each step is more discrete (that is, smoother) than before.

26 steps from f/1.6 to f/9.5 is smoother than 26 steps from f/1.6 to f/16.

A. J. deLange September 19th, 2005 09:30 AM

0.2 stops per step as opposed to quarter stop steps (assuming they are uniformly spaced).

Boyd Ostroff September 19th, 2005 11:56 AM

In the Sony world the PD-150/VX-2000 had only 12 discrete clicks which resulted in very noticeable manual changes. With the PD-170 they doubled this to 24. I don't know how this works on the Z1, but the wheel turns smoothly with no discernable clicks and the transitions look completely smooth - huge improvement. Let's hope Canon did something similar.


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