Dragonophile

I am on my third Fujinon 150-600mm lens. I really love the reach, lightweight and sharpness that's fine for my needs. But there is a reason I am on my third one. The first was purchased new and worked fine until I dropped it. Sent it to Fuji for fixing. Came back with unreliable IS - worked fine at times but other times rolled and/jerked. Sent back and waited. Problem not fixed but I know intermittent problems are hard to fix sometimes. So, purchased a nearly new one from Japanese dealer off Ebay. Within a few days, it was doing the same intermittent thing. Perfect sometimes; annoying other times. I have 2 Fuji X-T4s and the same lens issue when I switched the lens from one to another. Well, I finally opted for an X-T5 and got a brand new lens. Guess what... same intermittent problem. Rock solid sometimes but jumpy others. I can not figure out a pattern of when one way or the other. Flipping on/off several times does not resolve problem. Sometimes the problem does resolve after shooting a while. Most of my pictures fine but ...
My question, am I extremely unlucky or is there a design flaw in this lens or am I not understanding something.

Dragonophile

Yes, I asked this question when I was using only X-T4 cameras. But now I am using an X-T5 and new lens while before one lens was damaged and the other not new. So I am more confused than ever on what is happening and WHY.

Cany143 Loc: SE Utah

I confess to having been tempted by the Fuji X-T5, but more for the IBS (in-body-stabilazition) than it's 40 mpx stats than by anything else. (An X-Pro1 and an X-T2 had been my previous Fujis; an X-T3 is my present [mirrorless, Fuji] shooter....), but I confess that I know little other than what I've read about the X-T5, or anything whatsoever about the 150-600 Fujinons you've had problem with.

Regardless, from what you'd written, I'm not altogether sure what it is that might be the cause of the 'jumpiness' you sort of described. Is that jumpiness a matter of focus? or seeking focus? or is it a matter of something else? Not knowing whether IS can or cannot be turned on or turned off on the lens -vs- whether or not the body's IBS --or focus mode-- can or cannot be made suitable for the OIS on/off of the lens-- or somehow 'tuned' to the lens-- via some menu setting, might there be some combination of lens and/or body settings that somehow cancel one or the other out? or that cause some sort of inconsistency?

Lacking any first-hand experience with either the lens or the body, menu settings are probably the first place I'd check.

SuperflyTNT Loc: Manassas VA

Not a Fuji shooter but exactly what I’m thinking. I’m assuming that Fuji does some sort of combo with IBIS and any OIS in the lens, but are there any relevant settings that affect it.

rwm283main Loc: Terryville, CT

I assume none of your other lenses have this problem when mounted on either the X-T4 or X-T5?

If they don’t have the problem I would suspect your 150-600mm is the problem. Hard to believe all those lenses that you have purchased recently have the same issue.

Is the firmware up to date on both the camera and lens?

I use Fujifilm cameras, X-T2/4 & X-S10, and lenses and never had an issue similar to what you described.

Good luck.

Don, the 2nd son Loc: Crowded Florida

Certainly does sound like two stabilization systems working against each other. Sometimes they sync other times they fight, and there would be the "jumpiness."

billnikon Loc: Pennsylvania/Ohio/Florida/Maui/Oregon/Vermont

Looks like you should be having long conversations with these folks. They are the only ones who will be able to help you.
https://www.fujifilm.com/us/en/contact

f8lee Loc: New Mexico

Well, I've had the 150-600 for 18 months now and use it on both the X-T4 and X-T5 and FWIW have never had this problem with either body...perhaps you just got "lucky" with that second lens.

Kevin.M Loc: Forked River, NJ

I have the-150-600 and have had no such issues using it with my X-T5. Fujifilm also has a 1on1 tech support service which is no charge to use, I have found them to be extremely helpful.

Best of luck ~Kevin

radiojohn

I have no lenses like this, but I do guess that, given the complexity of modern menus, perhaps something is set wrong. Have you tried putting the camera back to "factory default" to see what happens? If others are no having the problem and THREE lenses you have are having the problem, that defies probability.

A pro friend used a certain lens, and another guy got the same one, but wasn't getting the same results. My friend put that lens on his camera and it worked just like his. In that case, it wasn't the lens, it wasn't the camera body, it was the other guy's technique or subject matter that was the trouble.

I do recall reading that turning off IS is a good idea when it is not needed.

So many variables!

efnelson

I hope your not thinking about a 4th lens.

efnelson

By any chance are you adjusting focal length after you activate auto focus?

chrisg-optical Loc: New York, NY

I am not a Fuji shooter but I had a similar problem with a 150-600 G2 Tamron lens on my D7200 when I had it. With VC (Tamron's version of OIS) on the OVF would be "jumpy" when the lens was moved quickly. There was a setting on the lens to disable VC until the shot is actually taken, but I left it as is since I knew what was causing it and just ignored it after a while. There should be a setting either in camera or on the lens to disable OIS until the shot is taken, perhaps. It may be another OIS "mode" setting.

rwm283main Loc: Terryville, CT

Is the IS programmed in your camera set to Continuous or When Shooting. Set it to Continuous if it isn’t.
Rich

JimBart Loc: Western Michigan

I’m not familiar with you camera or system but if I had your problems I’d be checking all my settings in the menu first. If all is ok then I would try a factory default setting and see what happens. If not corrected I’d call the manufacturer