xxx
Active member
Most likely some ham-fisted screwdriver jockey thought those mini screws need another 20 ft lbs of torque.
Nikkor Z 70-200 and Z 100-400 Serious Lens Foot Problem.
- Thread starter PBH427
- Start date
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Guido Bee
Active member
I think the F mount 500 PF has a similar system. I do not own any Z mount lenses.
My experience with the PF has not been good. Twice the lens separated from the mount / handle.
I replaced it with a Kirk, which has a longer "trigger" travel to the release point. No more problems.
I have seen no problems with the screws to the lens. Just my experience, not sure this relates to the Z mount issues.
All the best.
My experience with the PF has not been good. Twice the lens separated from the mount / handle.
I replaced it with a Kirk, which has a longer "trigger" travel to the release point. No more problems.
I have seen no problems with the screws to the lens. Just my experience, not sure this relates to the Z mount issues.
All the best.
I removed the screws, cleaned the threads with an alcohol swab, then used a needle to apply a small drop of Blue Loctite to each screw. I then tightened them down carefully. Did that last year to my Z 70-200, 100-400, and 600pF. Lenses are used regularly-still tight.
Ming
New member
What size screwdriver is everyone using? The manual references 2MM Phillips, which does not seem right. I have a JIS #0, which I believe is 2MM, but it seems too big.
mathjak107
Well-known member
a zero fits perfectly
i bought this one
Bikeman
Member
I have had to add loctite to my telephotos with this mounting plate. I noticed wobbling of tripod foot and when I removed the foot The four screws were loose.
Wish the mounting plate under the four screws went slid into some kind of dovetail or wedge so that the screws were only keeping it from slipping out and not the only means of holding the plate on. The lens foot will initially hold the screws In place when they loose and then I am guessing the play wiggles the screws till they can strip out as in the video mentioned.
Wish the mounting plate under the four screws went slid into some kind of dovetail or wedge so that the screws were only keeping it from slipping out and not the only means of holding the plate on. The lens foot will initially hold the screws In place when they loose and then I am guessing the play wiggles the screws till they can strip out as in the video mentioned.
If when selecting a lens for a shoot there is no "wiggle" on the tripod foot the 4 screws mentioned and the screws for any Arca-Swiss QR plate are tight.
It is also worth checking prior to a shoot if the 3 tripod screw-in feet are tight.
It is also worth checking prior to a shoot if the 3 tripod screw-in feet are tight.
KP Birder
Active member
I have to disagree. I had a brand new 500pf that had a bit of wiggle in the foot, but I didn’t worry too much about it because I had a new Kirk replacement foot on order, and may have used it that way for less than a month. After I installed the Kirk foot, I still had the wiggle, so I investigated more closely. All four screws holding the foot to the body were loose. After tightening, have had no wiggle worries whatsoever.
mathjak107
Well-known member
my wife and i both have the 70-200 f2.8 z and both have no screw issue.. but my 600mm pf f6.3 did in just the first 2 weeks
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Chris Dees
New member
I have a 100-400, 400/4.5 and 600PF with no screw-issues.
mathjak107
Well-known member
my wife and igot our 70-200 in august and sept and it’s still jis
Parfumeur
Active member
>> the 70-200 does not have the cross-type (JIS) screws. It has what appears to be very small Hex-head fasteners
Maybe a picture, even cell phone. would help out about the Hex replacement.
Also, if someone has a picture of the opening without the plate would help, as to what is under. THANKS
Maybe a picture, even cell phone. would help out about the Hex replacement.
Also, if someone has a picture of the opening without the plate would help, as to what is under. THANKS
OK - I feel like an idiot. I just re-checked my Z70-200 to take a picture of the screws and it DOES have the JIS cross-type. Sorry about that everyone.
Of course, I'm gonna have to spend tomorrow pulling every lens I own to see where I saw those other fasteners. Again - sorry.
Parfumeur
Active member
Not an issue. It's good to check and recheck. They are indeed small. As for me, I do not recall what is under the plate and what I did whan I installed the Hejnar foot NFR-001. I actually got the longer foot, not listed NFR-001-X But the foor is too close to the lens barrel, making carrying by the foot a knuckle scrapper.
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fcotterill
Well-known member
Here's the definitive information on JIS screwdrivers, notably the blog post by Richard Haw.
I've had JIS screws loosening on the D850 bayonet ring from its hard life. If anyone is wary of fixing such issues oneself, then it'll only take a photo repair technician a few minutes to sort out.
bcgforums.com
I always carry the correct sized JIS tools on trips with a Loktite tube, Leatherman, Allen key multitool for tripods etc
bcgforums.com
I've had JIS screws loosening on the D850 bayonet ring from its hard life. If anyone is wary of fixing such issues oneself, then it'll only take a photo repair technician a few minutes to sort out.
JIS (Japanese Industrial Standard) screwdrivers for cameras and lenses
I recently found that a few of my photography friends had never heard of JIS screwdrivers. I thought I'd share what I know with the group here. Many people use mini screwdriver sets manufactured in the US to tighten or unscrew the small screws in our Japanese cameras and lenses. These mini...
bcgforums.com
JIS Screwdriver Sets | revlimiter.net Store
revlimiter.net Store - JIS Japanese Industry Standard screwdrivers by Vessel.
revlimiter.net
I always carry the correct sized JIS tools on trips with a Loktite tube, Leatherman, Allen key multitool for tripods etc
What tools and accessories do you carry in the field?
Besides camera and tripod/monopod what essential photography gear do you always take to the field? I was only carrying an extra battery, memory cards and a cleaning cloth till last week when I hand a screw loosen up on my monopod gimbal head. I’m adding a few Allen head screwdrivers to my...
bcgforums.com
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The wobble you reference is a clear sign that the screws are loose. That was the sign on each of my lenses that had this issue. If you use a lens on a tripod you notice easily, but if you only handhold the lens, it's more difficult to notice a problem. If you get to the point of a wobble, you have more than just a single screw loose - all four are loose to varying degrees. It may take just a half twist or they may be much looser.
It's quite possible that a loose screw or plate that is ignored could lead to damaging the threads. Also be aware that manually tightening the screws to could break the adhesion provided by any thread locker that might have been used, so you need to use Blue or Purple Loctite to properly tighten the screws.
This kind of thing is a nuisance, but easily handled. I also keep a set of JIS screwdrivers, a set of Allen Wrenches, and a small tube of Blue Loctite in my camera bag. My "spares and repairs kit" also includes extra lens and body caps, sensor swabs, a rocket blower, and Zeiss lens wipes - all in a small ZipLock bag.
Parfumeur
Active member
Also contact cleaner like Stabilant 22A. The generic is also used to clean litho plates and is a pluronic in SDA or IPA. Not a petroleum base solvent.
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mathjak107
Well-known member
the 241 locktite is usually not available locally as the standard blue is 242 and has a viscosity for larger screws .
i used what was available which was the regular 242 and so far so good . i periodically see if i can move them backwards with a light tough so as not to break the loctite adhesive. it’s been 6 months now and none have worked loose
Dollar
Member
Sorry to hear that you've had that issue, I know you're not the only one with that experience. Having seen many others with similar complaints, any time I'm replacing a lens foot I go with whatever aftermarket brand I have to in order to not have that side screw and release lever design.
RRS, Kirk, ProMediaGear, Hejnar, whatever. I haven't had a quality complaint with any of them but I don't want to deal with any fancy mechanisms that make it any easier to release a tripod foot. My strap is QD so I don't see why I would want the foot to come off anyway. All of my lens feet are secured to the lens or collar by screws running directly from the foot to the mount.
That's a good idea, I've been carrying the Allen wrenches in my bag but will have to add the screwdrivers. Now to go find out if I can spend entirely too much money on some nice ones.
Spending too much money on good tools is always a good idea.
TCzPhotos
Member
My guess is that the screws were loose for a while and wore out the threads.
mathjak107
Well-known member
mine were loose on a two week old 600mm pf f6.3
pierrecamin
Member
Well, nothing is impossible but to be loose enough to do that kind of damage to the threaded holes......I can't believe one wouldn't feel how loose / sloppy the lens foot would feel even by simply holding it before that kind go damage...but, never know I guess.
I checked my new Z 70-200/2.8 and the bolts needed about 1/4 turn but at that scale, the max Nm is tiny, probably like 2-2.5Nm at most. Interestingly I looked at my canon RF 70-200/2.8 "Z" (internal zoom) and its foot has SIX bolts vs the Nikkor 4 bolts.
Sometimes this forum is so helpful! I have never heard of this issue. If I can confess my ignorance, I have never heard of JIS screws either. I have a Z 70-200 and a Z 600PF and have not had an issue (and checked both just now - no wiggle). I rarely use them on a tripod so have not exerted much pressure on the plate. Still, I am now inclined to buy the screwdriver to have just in case. Thank you so much for this information (including that the screwdriver size is zero).