p.5 #1 · IS unit of RF 100-500mm not parking - a mechanical weakness?
cpe1991 wrote:
I started this thread because of the report by Roger and I wanted to find out if there were any forum members evidence. Now that Roger has stripped down the broken lenses and found that the damage appears unrelated to the unparked IS unit, I am relieved and wont' worry any more.
p.5 #2 · IS unit of RF 100-500mm not parking - a mechanical weakness?
dcisive wrote:
While you all are obsessing over some "theoretical" flaw in design by some of the most competent engineers in the business around the world,
p.5 #3 · IS unit of RF 100-500mm not parking - a mechanical weakness?
I’m not at all concerned about my 100-500 or other RF lenses at all. After getting my RF24-105 over a year I ago I made sure to power down before swapping lenses as per instructions and will continue to do so.
p.5 #4 · IS unit of RF 100-500mm not parking - a mechanical weakness?
So it is not the IS group, but now there is still the question of why that element cracked failed. Changes in temperature can cause failures if parts are not in tolerance.
p.5 #6 · IS unit of RF 100-500mm not parking - a mechanical weakness?
Zenon Char wrote:
I’m not at all concerned about my 100-500 or other RF lenses as all. After getting my RF24-105 over a year I ago I made sure to power down before swapping lenses as per instructions and will continue to do so.
I've been turning OFF power before doing a lens change since a D30 in 1999 and never looked back. it's just sensible practice on nearly anything electronic. I for one am not the least bit concerned about the 100-500's design. I don't drop or mangle my gear so no worries at all.
p.5 #7 · IS unit of RF 100-500mm not parking - a mechanical weakness?
I have never turned power off on any Canon, Nikon, Sony, or Olympus camera before doing a lens change, and never had a malfunction or damage as a result.
p.5 #8 · IS unit of RF 100-500mm not parking - a mechanical weakness?
dcisive wrote:
I've been turning OFF power before doing a lens change since a D30 in 1999 and never looked back. it's just sensible practice on nearly anything electronic. I for one am not the least bit concerned about the 100-500's design. I don't drop or mangle my gear so no worries at all.
I should have as well and I agree with you when it comes to electronics. Reading forums over the years people didn’t so I sort of fell into that. I waited a few seconds for the IS to shut off. The R system (with EF lens in use) is different. I only mentioned it because IS runs for 45 seconds minimum before it powers off and you can hear and feel it shut off. It
On an RF lens the IS assembly continuous to run if you shut the lens IS switch off. It doesn’t stabilize but it runs.
IBIS I believe is the same. I have read posts about rattling in the body. I’m not worried about that either. That is the design and I’m confident is equally protected when powered down properly.
I guess I should have not mentioned powering down the R system before swapping lenses in this thread. It was not meant to invoke fear.
p.5 #9 · IS unit of RF 100-500mm not parking - a mechanical weakness?
RCicala wrote:
The cracks we see are NOT in the IS unit, they are in the front focusing group. Looking through the lens the cracks seem to move with the IS unit when we shook it, because optics and all. But the IS units, while not parkable, seem very sturdy. We literally rattled it in our hands as hard as we could and it cared not.
Now why the front focusing element cracked, I do not know. It's not directly impacting any other element, we fit them all back together and it's not possible. Maybe there were a couple of defective elements or something. But we're looking into it and Canon knows about it.
p.5 #10 · IS unit of RF 100-500mm not parking - a mechanical weakness?
dcisive wrote:
While you all are obsessing over some "theoretical" flaw in design by some of the most competent engineers in the business around the world, I'm off enjoying the remarkable shots taken with this wonderful accurate lens and all it's attributes. I've never experienced one defective or problematic Canon lens over the last 25 years I've been buying many of them. But then I don't drop them. smack them into a mountain while hiking, hand it to a child to play with, take it to a rumble, send it across country via UPS and FedX on a regular basis nor use it as a weapon. Perhaps that's why they always work flawlessly. ...Show more →
Yeah, I just take it out and shoot, don't worry and don't obsess over what might happen. If there's a problem, I will cross that bridge when I get to it.
p.5 #11 · IS unit of RF 100-500mm not parking - a mechanical weakness?
Imagemaster wrote:
I have never turned power off on any Canon, Nikon, Sony, or Olympus camera before doing a lens change, and never had a malfunction or damage as a result.
Me either. Those photojournalist do it all the time. I wander what they do when out in the field and need to change quickly because something popped up.
p.5 #12 · IS unit of RF 100-500mm not parking - a mechanical weakness?
Is the notion that, because something behaved in a particular manner on a past design, render it conclusively impossible to behave differently on a future design, equate to sound logic?
p.5 #13 · IS unit of RF 100-500mm not parking - a mechanical weakness?
Sy Sez wrote:
Is the notion that, because something behaved in a particular manner on a past design, render it conclusively impossible to behave differently on a future design, equate to sound logic?
Yes, no, maybe. I do it with my R5, too, and no ill effects. So, this includes past, current and future gear.
p.5 #14 · IS unit of RF 100-500mm not parking - a mechanical weakness?
I am worried about dust on the sensor more than anything else. I understand that leaving the sensor exposed, especially when the camera is not turned off, is inviting dust to settle on the sensor. This is not a problem with Olympus lenses as they have the best self/auto cleaning sensor of any camera/brand. I’ve not had to clean the sensor even once in the 8 years of shooting with Olympus cameras. But I would definitely want to turn off the camera when I change lenses on my R5 - as the shutter closes and shields off the sensor when it’s switched off.
Imagemaster wrote:
I have never turned power off on any Canon, Nikon, Sony, or Olympus camera before doing a lens change, and never had a malfunction or damage as a result.
p.5 #15 · IS unit of RF 100-500mm not parking - a mechanical weakness?
Imagemaster wrote:
I have never turned power off on any Canon, Nikon, Sony, or Olympus camera before doing a lens change, and never had a malfunction or damage as a result.
I also have no time nor inclination to wait and miss critical opportunities.
p.5 #16 · IS unit of RF 100-500mm not parking - a mechanical weakness?
Imagemaster wrote:
I have never turned power off on any Canon, Nikon, Sony, or Olympus camera before doing a lens change, and never had a malfunction or damage as a result.
p.5 #17 · IS unit of RF 100-500mm not parking - a mechanical weakness?
Most photojournalists do not own the equipment they use at work. Speed of operation is of the essence and being careful with their gear is the furthest thing on their minds.
Unless you you are in a situation where the loss of 4 or 5 seconds can cost you an amazing capture, I would make a habit of turning the camera off when changing lenses to minimize the risk of sticky dust settling on the sensor.
Methodical wrote:
Me either. Those photojournalist do it all the time. I wander what they do when out in the field and need to change quickly because something popped up.
p.5 #18 · IS unit of RF 100-500mm not parking - a mechanical weakness?
Imagemaster wrote:
I have never turned power off on any Canon, Nikon, Sony, or Olympus camera before doing a lens change, and never had a malfunction or damage as a result.
Reminds me of the guy who jumped off the Empire State and was heard to say on the way down: "So far so good, so far so good, so far..."
p.5 #20 · IS unit of RF 100-500mm not parking - a mechanical weakness?
bobbytan wrote:
Most photojournalists do not own the equipment they use at work. Speed of operation is of the essence and being careful with their gear is the furthest thing on their minds.
Unless you you are in a situation where the loss of 4 or 5 seconds can cost you an amazing capture, I would make a habit of turning the camera off when changing lenses to minimize the risk of sticky dust settling on the sensor.
It is not about dust for me. The IS assembly does not stop operating after you release the shutter or BBF using an R body. This is not the same as a my SLR and DSLRs. When I swapped the lenses with DSLR's the IS assemble stopped operating by the time I got to it. I know about the electronics part and the EF manuals say to power down but others did and no reports. The new IS system is only a few years old.
