Question about Tamron 18-200mm f/3.5-6.3 for Nikon

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Aperture not going below 6

Hi,
When I extend the lens at all, I cannot change the aperture on this lens to go below 6. Is this a problem with the camera or a setting I have to change?

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There is no problem. The lens is f/3.5-6.3. That means that at 200mm the maximum aperture is f/6.3. At long focal lengths you will not be able to open up beyond f/6 or so. At the short end, at 18mm the maximum aperture is f/3.5.

Posted on Jan 20, 2010

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My aperture or lens isn't opening - can't take a picture. It worked fine a couple of weeks ago and when I tried to use it this week it was a no go.


Aperture and lens are two different things. If you mean the camera is taking black pictures (something common for the S5), then see this link.


But if you mean that the lens isn't extending properly, then see this video:

Dec 08, 2012 | Canon PowerShot S5 IS Digital Camera

1 Answer

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

1 Answer

Message: Lock lens aperture ring at minimum aperture (largest f-number) I think I'm doing this but the message won't go away and the camera won't work.


You must lock the aperture ring to f/22, so the camera can engage the aperture adjustment lever on the lens. Then, you can change the aperture with the command wheel.

When you change the aperture with the command wheel the aperture ring on the lens doesn't move when the camera actually adjusts the lens aperture.

Take the lens off and locate the aperture adjustment lever on the lens mount.

Unfortunately, this won't work with older AF lenses. So if you are using an older lens, the only thing you can do is change the camera setting to M (Manual) to adjust the aperture on the lens yourself.

May 16, 2011 | Nikon D60 Digital Camera

1 Answer

Lens error


I've got the answers...

Problem: Lens error.
Symptom: Lens will not extend upon power up.
Cause: Lens is impeded while trying to extend.
This is usually caused by one of two circumstances. (1) The user dropped the camera while the lens was extended causing a mechanical failure. (2) The lens attempts to extend while in a pouch or pocket without the user's knowledge. This usually happens when the user is carrying the camera with the battery in. When/if the REC button or power button is pressed accidentally, the lens will attempt to extend but can't. This causes the main drive gears to be damaged.

Solution: Replace the main drive gear assembly. This should only be done by a qualified tech.
If you've experienced this you know exactly what I mean. This should clear up any notion that the "Lens Gods" have cursed you. Although this may have appeared to be a mystery, it's always caused by something!

Problem: Lens error.
Symptom: Lens extends, makes a few buzzing noises and retracts, resulting in "lens error" message.
Cause: This is caused by damage to the focus lens often by impact, or sand in the mechanism.
Solution:The focus lens gears either need to be replaced or the assembly completely rebuilt. Again, this should be done by a qualified tech. It's a very delicate process.

Problem: Aperture unit failure
Symptom: images appear to be washed out, over exposed and often have horizontal lines through them.
Cause:The aperture unit is either stuck, damaged or not receiving the proper electrical signal to activate. The result is that the aperture remains open after the picture is taken and CCD is over exposed.
Solution:Completely rebuild the aperture unit, which requires complete lens dis-assembly and rebuild. Again, this should be done by a qualified tech. It's a VERY delicate process.


Additional details in THIS LINK.

Hope this helps.

Apr 27, 2011 | Casio Exilim EXZ75 Digital Camera

1 Answer

How do I change the aperture on my N6006? And what do I change it to? I keep getting a fE E error message.


That depends on the exposure mode.

In any of the P modes, turn the aperture ring on the lens to its smallest aperture (largest aperture) and lock it. You control the exposure by turning the command dial on the camera.

In S mode, lock the aperture ring as above. Turning the command dial changes the shutter speed and the aperture changes to match.

In A mode, control the aperture by turning the aperture ring on the lens and the shutter speed with change to match.

In M mode, control the aperture by turning the aperture ring on the lens and control the shutter speed by turning the command dial.

If the lens doesn't have an aperture ring, you can only use the P and S modes.

Nov 14, 2010 | Nikon N6006 35mm SLR Camera

1 Answer

Hi- purchased the Extender EF 2X II; it seems fine with my fixed focus 300mm, but the auto-focus doesn't operate with my 70-200mm EF IS USM zoom, in any mode. Any suggestions? Thanks G


You haven't stated which body you have but the AF will not work with the extender if the effective lens aperture is too low (remember that a 2x extender doubles the focal length but halves the effective aperture).

Canon's own website states: "Autofocusing does not operate if the effective maximum aperture is greater than f/5.6 (greater than f/8 on the EOS 1V and EOS 3)."

Aug 01, 2010 | Canon Extender EF 2x II Lens Converter

1 Answer

Canon Extender EX 1.4x ii not autofocussing


The EOS 40D only use auto focus up to aperture 5.6. Only the 1-series use auto focus up to aperture 8. The adapter adds 1 stop to the lens aperture. Since the 100-400 is a 4.5-5.6, the aperture range with the extender mounted will be 6.3-8.
There is a work around though. Just place a thin strip of insulating tape over the three pins on the lefthand side (lens side of the extender). No damage will occur to the camera or teleconverter. 
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Jan 13, 2009 | Canon Extender EF 1.4x II Lens

1 Answer

Canon EF-S 17-85MM F/4-5.6 IS USM prevents features from working on 40D


something sounds strange about this. aperture 00 is an invalid aperture value. stands to reason if that is the case the camera would complain about it. via error code. being that its only six mos. old i would give canon a ring.

Oct 11, 2008 | Canon EF-S 17-85MM F/4-5.6 IS USM Lens

2 Answers

Lens won't allow me to change aperture & several other functions on camera


The USM engine may be out of order, or there is a bad contact in the lens.

Oct 11, 2008 | Canon EF-S 17-85MM F/4-5.6 IS USM Lens

1 Answer

Aperture cannot open fully


As you have found out, it is not a lubrication issue. It would seem that your lens has a problem with the linkage arm inside the mount. The arm that extends out of the mount could be bent or misaligned. It would be fixable, but the parts are somewhat delicate. Best to let a good repair person have a look.

Dec 29, 2007 | Nikon 105mm f/2.5 Nikkor Ai-S Lens

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