Question about Canon T90 35mm SLR Camera

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Lens mount ring on body is slightly loose, can this cause any problems if so is there an easy solution? thanks David.

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  • Anonymous Oct 02, 2008

    I just got my T-90 by post and it is beautiful EXCEPT for this very same problem: a slight loose lens mount. After owning a rock-solid A-1 this is no fun at all !



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If the lens you're using has an aperture ring, turn it to its smallest setting (largest f/number). You can control the aperture from the camera body, the same way as on a lens without an aperture ring.
If the lens does not have an aperture ring, try cleaning the electrical contacts, both on the back of the lens and in the lens mount on the camera body.

Feb 27, 2012 | Nikon D3000 Digital Camera

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I have a Nikon D70, and a Quantaray lens (28-90mm). I have had this camera for about four months, and it has been working fine with the lens. When I received the camera, the aperture ring moved, but the...

In order for the aperture to be controlled by the camera's program or primary and secondary control knobs, the lens must be set to the smallest opening - or highest number value f stop. The aperture must be operated by the ring if it is not left in the smallest opening position.

The FEE code you are seeing refers to a communication error between the lens and the camera body. Sometimes, simply removing the lens from the body and reseating it to the body will solve the problem. While the lens is off the body, carefully inspect the gold colored contacts on the lens and mating contacts on the camera body. Remove any dirt or debris found, being careful not to allow it to fall into the camera - or land on the back glass of the lens.

I found another explanation and possible remedy that stated:

"A flashing "FEE" is an improperly set aperture ring in 99.9% of all cases with this error message (i.e. user error). In very rare circumstances it can be caused by a damaged aperture ring (small lug broken from back edge) that can't "tell" the camera it is at the minimum position. If the aperture rings on the lens is set to minimum aperture (highest number) and locked there, but you still get a FEE error, it's possible that sloppy tolerances are causing the lens aperture ring to not move the little switch at the 8 o'clock position (on the D70 lens mount) as far as necessary to get a proper indication of minimum aperture. Try to see if the aperture ring (while locked) will move slightly when mounted on the camera to clear the FEE error.

Another remote possibility is that the little switch at the 8 o'clock position mentioned above is not functioning properly (sometimes they get dirty). Try "exercising" it by moving it back and forth with your finger, then try the lenses again. Usually FEE has nothing at all to do with CPU contacts (with a reverse engineered third party lens anything is possible I suppose), but it doesn't hurt to clean them to eliminate that possibility."

You can also try a different Nikon compatible lens. If the trouble is still present, the camera may need to be returned for repair. If the the problem goes away, then the issue is tied to the lens itself. This would mean the the lens needs repair.

I hope this helps and good luck! Please rate my reply - thanks!

Jun 30, 2011 | Quantaray 28-90mm f/3.5-5.6 for Pentax

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It is brand new Tamron 28-75 f2.8 for Sony mount. When it is focusing on an object and rotates from one end to the other velocity causing to shift image slightly in the direction of rotating AF ring....


You should turn the aperture ring on the lens toits smallest setting (largest f/number). If the ring has a lock, lock it inplace. You control the aperture from the camera body, just as you would on alens with no aperture ring.

Let me know if you need more information


Feb 18, 2011 | Tamron 28-75 F2.8 XR AF Lens

2 Answers

I changed lens to a 50mmf.1.8 d and the camera wont let me take photos with it in autofocus mode. i get an F-- error.

This can be cause by invalid contact point between the lens and the body of the camera
You can try these simple troubleshooting steps:
  • It usually resolves immediately if I give a slight twist on the barrel, worst case scenario I unseat and re-seat the lens.
  • Turning the camera off and on often fixes the problem
This small metal contact should be responsible for "ground" contact with the camera frame on a lens with plastic mount:bourngenius_10.jpg
Keep this clean and it should limit the error

Jan 04, 2011 | Nikon D7000 Digital Camera

1 Answer

Lens will not connect to camera body

If one or more of the screws that hold the mount are loose, that could cause that problem.

Oct 05, 2009 | Canon EF 70-200mm f/2.8L USM Lens

1 Answer

Upper left corner prismatic simicircle when screen is black

Sounds as if you have some sort of foreign body within the unit possibly an insect I know this sounds strange but I have removed Mice from sets before now ?. How they get in is a mystery but they do and they can bung up the works .
A less helpful reason is that heat has caused some plastic to crack and drop into the lens mechanism , I have had that happen a few times usually from off the fan blades above the lamp now inverted on celling mounts puts the fan under the heat . An inspection by a qualified engineer may be the first step then decide what to do when you are told the cause ?. .. Regards Vortash

Oct 31, 2008 | InFocus LP 530 Multimedia Projector

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80~200 not focusing on my D200

If lens has aperture ring, set to min aperture before mounting (f22 etc)
With heavier lenses it is not so easy to tell when lens clicks in all the way to mount, Lens wont autofocus if not clicked in to mount just so. Also both camera and lens should be set to AF.

May 17, 2008 | Nikon D200 Body Only Digital Camera

2 Answers

The Zoom ring is stuck between 24 mm and aprox 40 mm. What can I do to fix this? Any hints would be appreciated. Charlie

My lens started catching as I zoomed in and out and would not go wider than ~24mm. The problem is one or more of the screws holding the zoom mechanism comes loose and jams. Follow this link for the fix; took me ~20 min to repair (I went very slowly)! Much easier than taking it apart from the rear.

Good luck...

Feb 16, 2008 | Nikon 18-70mm f/3.5-4.5G ED-IF AF-S DX...

2 Answers

Camera (D200) no longer sees that the diaphragm lock is on. If I jiggle the diaphragm ring it works for amoment. How do I fix this?Thanks

With the lens off, look at the camera mount area. If you are looking straight at the mount, there is a small tab sticking out at about 7oclock on the outside edge of the mount ring. The tab is spring loaded and may be damaged. You should be able to push the tab toward the base of the camera and it will snap back if functioning properly. If it feels loose or doesn't spring back, then switch that ab controls is not being activated.

Oct 24, 2007 | Nikon 20MM F2.8 AF NIKKOR Lens

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Your problem could be caused by one of several things. The lens may be out of adjustment or have a loose mount. The camera also had problems with the mirror hinges. Look into the mirror area with the lens off to see if the mirror is square within the mount ring.

Oct 09, 2007 | Nikon N2000 35mm SLR Camera

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