Question about Tokina f/PENTAX- 28/2.8 SL Lens f/Pentax-Ricoh PKAR USA SLR Lens sl28p

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Fixing aperture blade mechanism

Please indicate the how to for disassembling the aperture mechanism for this lens, the RMC version. Thank you.

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If your not a trained qualified tech,never try to open your lens,you may spoil it all, since you need refocusing.

Posted on Jan 26, 2007

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Posted on Jan 02, 2017

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Hi, I have a Nikon D60. Somehow I locked aperture at highest number. Even with Manual setting, it does not let me change aperture! Please help


The lens is supposed to be locked at its smallest setting (largest f/number). You can control the aperture from the camera body, the same was as on a lens without an aperture ring. For example, in aperture priority mode (A), simply turn the command dial. In manual mode (M), hold down the exposure compensation button while turning the command dial.

That was for a lens with the electronics to communicate with the camera. If you have a purely mechanical lens, you must shoot in manual mode and control the aperture by turning the ring on the lens. There should be a small orange slide near the aperture ring, Slide it toward the front of the lens to unlock the ring.

If you need more help, please feel free to reply to this post. Please specify the lens when you do.

Aug 13, 2011 | Nikon D60 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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I am new user for DSLR, using old 50 mm 1.8 manual focus on D80, unable to see any inmage on playback (shows information). Will this lens work with D80, using settings as manual mode, f22 . Please guide...


Turn the aperture ring to its smallest setting (largest f/number). You control the aperture from the camera body, as on a lens without an aperture ring. Turn the mode dial to M (manual). The camera's exposure meter will not work with this lens. You can use another lens to get an approximate exposure, or take pictures and review them and/or use the histogram to fine-tune the exposure. The camera won't autofocus, of course, but the in-focus indicator in the viewfinder will still light up to indicate proper focus.

Jun 17, 2011 | Nikon D80 Digital Camera with 18-135mm...

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I have a Sigma 70-300mm lense which, when I attach it to my D300 gives me an error message of FEE. I was assured when I bought the lense that it would work. Am I doing something wrong?


You didn't specify which Sigma 70-300mm lens (Sigma has at least five different versions, and I'm not referring to the lens mount), but from the error message I assume the lens has an aperture ring. Turn the aperture ring to its smallest setting (largest f/number) and lock it in place. Control the aperture from the camera, the same way as on a lens without an aperture ring.

If the lens doesn't have an aperture ring, please reply to this post specifying the exact model of the lens. That's all of the numbers and letters around the 70-300mm, like AF, DGO, f/4.5, etc.

Feb 27, 2011 | Nikon D300 Body Only Digital Camera

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I just bought a Tokina 100mm f/2.8 AT-X M100 AF Pro D Macro Auto Focus Lens from B & H and put it on my Nikon D300. When I press the button a blinking FEE appears. What seems to be the problem?...


The FEE error indicates that the camera cannot control the full range of the lens aperture. If your lens has a mechanical aperture ring, rotate the aperture to its smallest opening, or highest f-number - normally marked in orange. Select this aperture and lock it using the aperture locking switch to prevent this message from appearing again.

Dec 18, 2010 | Cameras

1 Answer

Sticking aperture


Yes. A good camera technician can partially disassemble the lens and then thoroughly clean the blades and the rest of the aperture diaphragm mechanism. This is commonly referred to as an internal CLA (cleaning, lubrication, and adjustment). This is a very nice macro lens and it is worth repairing if it otherwise is in exceptionally nice condition.

Apr 19, 2009 | Nikon 55mm f/2.8 AIS Micro Nikkor Lens

1 Answer

Canon ef 75-300 aperture fixed at f22


I disassembling my canon eos kiss body my self.

I used some pictures given by Google search. Did u try that??

Jul 31, 2008 | Canon 75-300mm f/4-5.6 III USM EF Lens

1 Answer

Pentax ist DS aperture setting problems


If you want to use the aperture ring on the lens you must enable this in the Custom settings menu. jamknight, sounds like your camera may need a professional cleaning.

Feb 01, 2008 | Pentax *ist DS Digital Camera

1 Answer

F8 aperture


You are able to shoot at F8 by opening the lens barrier and sliding the macro switch to the Macro mode. This provides a mechanical aperture of F8. We recommend the use of this setting either when shooting close up images or when shooting images in a very brightly lit scene. Unfortunately, because the aperture is mechanical, the EXIF information is not recorded. Therefore, you can not see whether you photographed an image in the Macro mode or if the aperture has been changed. However, you can physically see the aperture close down by looking at the lens with a magnifying glass or loupe when turning the sliding the macro switch to the Macro mode.

Aug 31, 2005 | Olympus Camedia D-380 Digital Camera

1 Answer

F8 aperture


You are able to shoot at F8 by opening the lens barrier and sliding the macro switch to the Macro mode. This provides a mechanical aperture of F8. We recommend the use of this setting either when shooting close up images or when shooting images in a very brightly lit scene. Unfortunately, because the aperture is mechanical, the EXIF information is not recorded. Therefore, you can not see whether you photographed an image in the Macro mode or if the aperture has been changed. However, you can physically see the aperture close down by looking at the lens with a magnifying glass or loupe when turning the sliding the macro switch to the Macro mode.

Aug 31, 2005 | Olympus Camedia D-370 Digital Camera

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