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

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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.

Posted by Roger Bartlett on

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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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1answer

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.
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1answer

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
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1answer

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.
http://www.facebook.com/pages/New-York-NY/PhotoTech-Repair-Service-Inc/102527215194
0helpful
1answer

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.
3helpful
1answer

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.
0helpful
1answer

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.
0helpful
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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 • Cameras
0helpful
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50mm C lens issue

From your description, Yes. All RB67 lenses have common problems, usually sticky blades. Since there are 2 sets of blades, (shutter and aperture), the shutter blades may be contaminated with oil/debris
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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.
0helpful
1answer

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.
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Pentax IqZoom 700 film camera E9 error shutter failure Hi, I have a pentax iqzoom 700 that I'd like to repair myself but E9 appears on the lcd screen after inserting a new battery and powering on. Other posts mention this is a shutter failure. When turning on, the zoom lens extends and the outer shutter covering the outside of the lens opens. I've read tutorials that say you can sometimes fix a shutter error by causing a power outage during a shot and opening the battery door while taking a picture, but this isn't possible in my case because no shot is fired when the shutter is pressed, likely because the camera recognizes the shutter failure. I've also watched videos on how to repair leaf shutters and mechanical shutters, but the manual for this camera states the shutter is an AE between-the-lens shutter so I have no idea how to disassemble and fix this sort of thing. Looking thru the lens both thru the front of the camera and in the film compartment on the other side show a dark covering behind the lens even while the outer shutter is open covering the outer lens, which I'm assuming is the between-the-lens shutter. Ideally, I'd like to repair this myself, as there's nothing lost if I screw up and it's not worth it otherwise to take it for repair. I'm a complete novice with absolutely no prior knowledge of taking apart things, but I can follow directions so any suggestions or links to videos/tutorials would be very much appreciated Side note that I've searched the web extensively and have yet to find anything specific to repairing this camera model, and I'm not knowledgeable enough to adapt a tutorial for a different camera to this model Thanks in advance!

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