Iris Issue With Canon 5D Mark II Firmware Update 2.0.4

April 6th, 2010

***UPDATE***

Canon Rumors is reporting this could be considered “Normal” behavior for this lens. I will follow up with more details when available.

The crew over at 5D Mark II Team have discovered a glitch in the new firmware update 2.0.4  for the Canon 5D Mark II. The Canon 100mm Macro’s Iris takes on a life of it’s own. Check out the tantalizing video of the Iris acting up. Here are some additional details from the 5D Mark II Team’s website.  Click Here For More Details.

· It does NOT happen with Firmware version 1.1.0
.

· It happens WHEN recording video and also when NOT recording video
.

· It happens with ISO and every possible automatic setting fixed to a value, or turned off
.

· It happens in C1/C2/C3 too (if they are registered as “M” modes for movie recording)
.

· It happens in PAL and NTSC modes
.

· It happens in both lens modes: MF and AF mode
.

· The camera does NOT tell any change in aperture setting (it keeps showing the same value) nor give any kind of advice either
.

· The iris shifting can be heard (and seen)
.

· The brightness shifting of the image is visible on the camera’s LCD monitor when the iris/aperture shift occurs
.

· The iris/aperture usually changes in small values, but enough to make the footage unusable, so using this great lens for movie/video purpose may result impossible

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Darryl
Guest
May 2nd, 2011

I have the same issue with:

70-200 f2.8
50mm f1.4
24-70 f2.8

Im suprised that this has been an error for so long and not addressed by Canon.

Anyone have any workarounds that do not involve hardware isolation of the lens aperture control?

D

jeremyw
jeremyw
Guest
April 20th, 2010

I’m getting the iris jitter as well with my Canon 180 mm macro since the firmware update.
I DO want to use my 5DII for macro video, and am pretty unhappy about this.

Come on Canon…

spiky247
spiky247
Guest
April 8th, 2010

+1 to mthomas, the camera is compensating for the loss of light when you change focus from infinity to macro distances.

Pablov
Pablov
Guest
April 12th, 2010
Reply to  spiky247

No, the iris jitter occurs even in dark room, it’s not related to light metering at all.

And I guess you misunderstood what mthomas has explained, he said the opposite.

Pablov
Pablov
Guest
April 12th, 2010
Reply to  spiky247

Forgot to mention: If you watch the videos carefully, it’s not an iris normal behavior stopping down, it’s a “jitter”.

Also, it’s NOT limited to Macro lenses.

Check: http://5dmark2.wordpress.com/2010/04/08/malfunction-in-firmware-2-0-4-update/

inmotion
inmotion
Guest
April 7th, 2010

I was using my 100mm macro on an important shoot and it was doing this for me as well. I can even see the flicker of iris changes when recording in live view mode. You can actually look through the lens and while focusing see the iris changing and making noise. Is there going to be a fix for this or should I go back to the prior firmware?

Chris Miller
Chris Miller
Guest
April 7th, 2010

weird noises out of my 70-200 IS F2.8 lense in Live Mode…(almost as if the focus motor is working OT. Decided not to mess around with it too much as the lense is worth as much as a new 7D and boy is that loolking like an option for my video work. 5D mark11 for stills 7D for slo-mo non downconverted video. Sounds good to me

Pablov
Pablov
Guest
April 6th, 2010

It’s good to clarify something that is already clear if you see the 2 videos posted.

What we are reporting is the iris “jitter” in full manual mode for movie/video. In this mode (M and LV set to “Stills+Movie-Movie Display”) the camera should not make any change at all to the iris, because it’s “full manual”.

This issue has nothing to do with what some people has posted at CR (I guess most of them didn’t even see the videos nor read the report)

A reader has sent a comment with a video test link, he found the same iris behavior on his Canon 300 F/4L IS. It’s not as noticeable as on the 100mm 2.8 Macro, but it’s there.

Check the updated post:
http://5dmark2.wordpress.com/2010/04/05/malfunction-in-firmware-2-0-4/

Of course, manual lenses on which the camera cannot change iris won’t show any issue of this kind.

Bandigo
Bandigo
Guest
April 6th, 2010

none L macro m8, just popped it on myself, this kills a few shoots ive been wanting to take >.<

jared
jared
Guest
April 6th, 2010

Just tested the 5D with 2.0.4 using a Zeiss ZE 100mm Macro, manual focus. No Iris Change whatsoever. I don’t have a Canon L 100mm Macro to test.

mthomas
mthomas
Guest
April 6th, 2010

CanonRumors is completely WRONG about this. Somebody needs to explain how light and aperture works to “Mike” before he starts confusing people.

The fact that an f2.8 aperture passes the same light as f5.6 at full macro distance has nothing to do with the actual iris closing down. This is because the distance from the film plane to the iris changes dramatically, making the iris opening appear to be smaller because it is farther away from the film plane.

If CR were right, reducing the iris when focusing near macro would result in 2x as much light loss as macro photographers experience. Of course, this is not correct.

If the actual lens iris is mechanically stopping down as the focus distance approaches macro, this must be a mistake in the 5D firmware’s algorithm for that lens. Few macro photographers use camera in video modes since large sensors are not ideal for close-up photography. I’m sure this element was not tested by Canon beta testers, due to its relative obscurity.

W
W
Guest
April 6th, 2010

Just test out any macro lens yourself.
Uncouple it and mess around with the focus ring and look at the iris. Remember it’s a photo macro lens

behyer
Guest
April 6th, 2010

Is that the old 100 macro, or the new L 100 macro?

jared
jared
Guest
April 6th, 2010
Reply to  behyer

New L Macro. I’m going to test it now. I will also test a Zeiss 100mm macro.
Jared

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