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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Re: Fixing aperture blade mechanism

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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Zenzanon 80

The lens does not have a shutter - that's in the camera body. The lens contains the aperture or f stop adjustment. It is done by injecting or retracting blades in the light stream of the lens barrel between the front and rear optics. Check the aperture blades to see if they move easily and open equally by varying the f-stop ring on the lens while looking through it. If not moving all the blades the same amount or it does not continue to restrict the opening as you increase the f-stop value, there's something wrong with the lens.

Are you sure you haven't accidentally activated any exposure compensation adjustment on the camera body?

Jan 10, 2012 | Bronica 80mm f/2.8 Zenzanon-PS Lens

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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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Does the Nikon - Nikkor 50 mm F/1.8 AF lens work with a D90? Sorry, Im a newbie, but I am looking at buying this lens, and would really like it to auto focus. I think it should, I just want to be sure...

Yes. I have one and it works perfectly on my D90. If you get the version with an aperture ring, be sure to set the aperture to its smallest setting (f/22) and lock it. You control the aperture from the camera, the same way as on a lens without an aperture ring. If you get the version without an aperture ring, don't worry about it.

Feb 13, 2011 | Nikon Camera Lenses

1 Answer

Nikon24-120 vr 1 aperture blade kock zoom ring

These lenses are highly complicated, and require adjustment after reassembly. Even if you do get it fixed, you do not have the necessary adjustment software to get it working properly. Try sending it to PhotoTech Repair Service in NYC. They are Nikon authorized, and factory trained with all the necessary equipment. Also if you join they're facebook page, they will give you a 10% discount.
Here is the facebook page link, it has everything you need to send it in.

Mar 12, 2010 | Nikon 80-200mm f/2.8D AFED Lens

1 Answer

Af-s nikkor 24-120mm/3.5-5.6g vr disassembly

your efforts are appreciated,must be careful,since disturbing optics result in poor/bad formation of image,if optic surfaces,convex, concave,etcchanges u willnot get image formation as aperture unit is in between the optics,step by step carefully disassemble take out the apartur unit, set the diapharm blades and then assemble.

Mar 06, 2010 | Nikon 80-200mm f/2.8D AFED Lens

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Disassembling my nikon 18-105mm VR lens to fix the aperture blade... nikon and shops repair service cost almost the same as the price i both for this used lens..

You are right. But Nikon and other authorized repair service give you a warranty after repairing. This gives you a good trust to be relax.
Sometimes you face with tough conditions if you repair yourself. Sometimes it needs expensive equipment to fix the lens. So they are right.

Feb 28, 2010 | Camera Lenses

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

Nikkor 50 1.8 overexposes

You probably have oils on the aperture blades and they do not close to the F stop you set as quickly as required, thus causing the over exposure. Easy to pinpoint: sent the aperture to full open (F1.8) and use appropriate shutter speeds as determined by the camera (in manual mode), if the picture does not over expose, then the problem is with the oiled contaminated aperture blades. Have it cleaned.

Feb 12, 2009 | Nikon Normal AF Nikkor 50mm f/1.8D...

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

Nikkor 105mm Ai-S micro lens aperture seems stuck

It does sound like your lens diaphragm/aperture ring coupling mechanism is in need of repair.

May 03, 2008 | Camera Lenses

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