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View Full Version : Canon 28-135 IS - Strange Behavior?

scottbergerphoto
16th of March 2005 (Wed), 09:47
I recently noticed some strange behavior from my canon 28-135 IS. I usually use it in One Shot mode. The IS functions normally. When I went to use it with the camera (20D) in AI Servo, the lense looks like it has Parkinson's Disease. The image in the viewfinder bobs up and down. I've never experienced this with my 100-400 IS. Has anyone had a similiar experience with the 28-135 IS?
Scott
robertwgross
16th of March 2005 (Wed), 09:59
Mine does that just a little bit.

---Bob Gross---
xuxu1
16th of March 2005 (Wed), 10:38
Nope... didīnt experience that. Neither with my 28-135 IS and not with my 100-400 IS. But canīt tell about 20D since iīm still using my 10D.

Regards
ED
PacAce
16th of March 2005 (Wed), 11:23
I recently noticed some strange behavior from my canon 28-135 IS. I usually use it in One Shot mode. The IS functions normally. When I went to use it with the camera (20D) in AI Servo, the lense looks like it has Parkinson's Disease. The image in the viewfinder bobs up and down. I've never experienced this with my 100-400 IS. Has anyone had a similiar experience with the 28-135 IS?
Scott
Does it do it continuously or just momentarily after you depress the shutter button? If it's just for a split second, then that's normal. If it does it continuously, it's time to call 911 and have an ambulance take it to Canon Hospital. :)
scottbergerphoto
16th of March 2005 (Wed), 11:33
Does it do it continuously or just momentarily after you depress the shutter button? If it's just for a split second, then that's normal. If it does it continuously, it's time to call 911 and have an ambulance take it to Canon Hospital. :)
That's what I was afraid of. It does it contiuously in AI Servo.
Scott
steven
16th of March 2005 (Wed), 12:32
I've had the 28-135 for a couple of months now and have not experienced the problem you are describing.
Alan Neilson
16th of March 2005 (Wed), 13:30
I've not notice that happening, not sure if also used that lens when AI Servo mode though but will check it out at the weekend, won't be on a 20D but a 10D or Eos 5. If I do get the same then will let you know
CyberDyneSystems
16th of March 2005 (Wed), 16:41
I don't have that lens ,. but I do have three other IS lenses,. and no the IS behaves no differently in one shot verses AI servo CF#4-1
smoothjazzgal
16th of March 2005 (Wed), 17:20
I use said lens on my 300D w/ AI Servo quite frequently, but have never experienced anything like you've described.
robertwgross
16th of March 2005 (Wed), 18:09
Scott, I think I see that condition on that lens on my 20D, and I saw it for sure with my old D60. However, I shoot mostly in one shot mode.

Let's say I have it without a tripod, but firmly braced, pointed at a bright flower at four feet, P mode. When I half-press the button, I would expect the lens focus to hunt quickly for about a half second, and then lock focus. I would get a focus lock indication, and then I would press down fully.

Instead, I half-press the button, and the lens focus will hunt in and out slightly giving me something suboptimal. So, I half-press again, and again it will hunt in and out slightly, just bumping the focus a bit here and there and still giving something suboptimal, over and over, jumping in and out. I can switch over to manual focus, and do whatever I want. I haven't yet figured out whether it is some failure specific to my lens, or whether it is in the use of IS mode, or whatever. Since I use that lens primarily for flowers in one-shot mode, it is still usable, but I haven't gotten to the bottom of the problem yet.

---Bob Gross---
JAZZ D.P.G.
16th of March 2005 (Wed), 18:31
Scott, Bob,
I have this lens and the D60, but not with me.

When I get home this weekend I'll verify their operation in the condition you describe. I'm use to it hunting, and I usually shot in AI.

I'll let you know what I find. Can't help on the 20D, we only have snow snakes up here this time of year.

Regards
defordphoto
16th of March 2005 (Wed), 18:34
This lens is a first generation IS and is not meant to be used in AI Servo when using IS.
robertwgross
16th of March 2005 (Wed), 19:21
This lens is a first generation IS and is not meant to be used in AI Servo when using IS.

Jim, I don't doubt what you say, but is that documented anywhere?

It might explain what Scott is into, but it doesn't explain what I am into.

---Bob Gross---
scottbergerphoto
16th of March 2005 (Wed), 19:34
I tested the lens on my 10D and 20D. Fine in one shot, bonkers in servo. Then I tested my 100-400 on both cameras in AI Servo and it was fine. Jim if you have any documentation as to what you say about the 1st generation IS and AI servo, please share it. I'd hate to send it to Canon for nothing.
Scott
JasonW
16th of March 2005 (Wed), 20:10
If I recall correctly the 28-135 IS USM was released with the EOS3 and was promoted by Canon as the kit lens for this camera. The EOS3 has an AI Servo function so it would seem a bit strange if the lens can't be used with it.

I have the 28-135 IS USM and have used it on both the EOS3 and 20D. I haven't noticed the issues that are referred to...
scottbergerphoto
17th of March 2005 (Thu), 06:01
The instruction manual that comes with the 28-135 IS says that the IS should not be used for moving subjects, but it doesn't say specifically that it shouldn't be used in AI Servo. Many people use AI Servo as their default mode even if their subject isn't moving. I remain flummoxed.
Scott
robertwgross
17th of March 2005 (Thu), 09:49
Dear Flummoxed in Brooklyn, we feel your pain.

---Bob Gross---
PacAce
17th of March 2005 (Thu), 11:13
The instruction manual that comes with the 28-135 IS says that the IS should not be used for moving subjects, but it doesn't say specifically that it shouldn't be used in AI Servo. Many people use AI Servo as their default mode even if their subject isn't moving. I remain flummoxed.
Scott
I was flummoxed about what "flummoxed" meant exactly so I looked it up in my handy-dandy PC dictionary. Now I am no longer flummoxed about the meaning of the word. But I am flummoxed at how you come up with all these words that mere mortals, such as myself, find flummoxing. :confused:


:mrgreen: :lol: :mrgreen:
robertwgross
17th of March 2005 (Thu), 11:20
Scott has dual degrees. Flash photography and rhetoric.

---Bob Gross---
blackviolet
17th of March 2005 (Thu), 14:55
scott - i just tested it on both the 1d and the 10d in ai servo... i'm sorry to report i do not see the behaviour you're seeing. :(
PacAce
17th of March 2005 (Thu), 19:01
Scott, I just tried the lens on the 1DmkII in AI Servo mode and sure enough, my lens exhibits continuous jittering although it's ever so slight. I can only notice it by paying close attention to the image. If I weren't looking for it, it'd be very hard to tell.

I then tried it on my 10D and it did the same thing although it was hardly noticeable compared to the 1DmkII. My camera shakes were much more noticeable than the lens jitters.

So maybe there's nothing wrong with your lens after all but that may depend on how severe your lens jitters are.
defordphoto
17th of March 2005 (Thu), 19:18
Jim, I don't doubt what you say, but is that documented anywhere?

It might explain what Scott is into, but it doesn't explain what I am into.

---Bob Gross---

Not that I know of, other than the fact that only the L lenses support horizontal tracking in IS mode II. BTW: I tested my 28-135IS on my MKII and it's solid as a rock. No shaking at all...
scottbergerphoto
17th of March 2005 (Thu), 20:31
I was flummoxed about what "flummoxed" meant exactly so I looked it up in my handy-dandy PC dictionary. Now I am no longer flummoxed about the meaning of the word. But I am flummoxed at how you come up with all these words that mere mortals, such as myself, find flummoxing. :confused:


:mrgreen: :lol: :mrgreen:
:lol: :lol: :lol: :lol:
Very good!
Scott