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

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Tamron18-200 f/3.5-6.3 I can't adjust the aperture to 3.5 even thought the focal lenght is 18mm, the max aperture is only f/6 i'm using nikon d50 .The focal distance too doesn't show the true reading when I checked on the camera info e.g when I set the lense to 80mm the info on the camera will shows 105mm it seems that d50 can't track the focal lenght what is going on??

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Re: tamron18-200 f/3.5-6.3

Tamron has identified this problem with the Canon. See link:, but I am not sure about your Nikon.

Posted on Dec 31, 2007

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I have a tamron 28-200mm lens that have a aperture ring at the back .. so is it possible to lock the aperture at f3.8 and shoot at 200mm focal ?? (this lens was f3.8- f5.6) by the way i was using a n

If you're using a Nikon camera, you want to lock the aperture ring at 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.

This has nothing to do with the focal length. You can shoot at any focal length from 28mm to 200mm.

Feb 10, 2014 | Camera Lenses

1 Answer

My sigma lens will not zoom all the way

Be aware, most camera's only allow AF to work as long as the aperture is greater than 5,6 (greater aperture means smaller number) So your lens only works from f 5 to 5,6. The last part where the aperture goes to 6,3, the AF won't work. So as long as your setting is on AF, the camera can't focus from a certain focal lenght. Switch over to MF and you should be able to use the zoom all the way.

Jan 28, 2014 | Sigma APO 170-500mm f/5-6.3 DG for Minolta...

2 Answers

Zooming from 18mm to 55m causes lens to darken (pictures taken are the same). This happens in both M and AF.

This is because the aperture varies with the focal length. Note the "f/3.5-5.6" in the lens designation? This means that the maximum aperture is f/3.5 at 18mm and f/5.6 at 55mm. If you set the aperture first and then zoom, the aperture could change by as much as one-and-a-third stops.
To prevent this, zoom first and then meter the exposure.

Aug 13, 2013 | Nikon Nikkor 18-55mm f/3.5-5.6G ED AF-S DX...

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My kit lenses, Canon 18-55mm stopped going till F/3.5, even using it in 18mm. Now the mininum it goes is F/5. Any solution for that?

If you are focusing very close that may be a consideration. But if it does not change at any focal length, and focal distance then it will need to be repaired. Or, try for excellent quality used lenses. That lens can be replaced to the same or less than a repair.

Nov 29, 2012 | Camera Lenses

1 Answer

Quantaray lense wont work on nikon D50

David -

The lowest setting is the highest number; f22 is lower than f4. It's little counter-intuitive, but the lowest setting means the least amount of light - or the smallest aperture opening - not the numerical "f" value of the opening.

Simply twist the aperture ring until the highest value "f" number is selected. Many lenses have a small tab or latch to lock them in this position - if yours does, you can use it to prevent this from happening again. You would use a command dial on most camera bodies to electronically change the aperture opening.

Good luck!

May 16, 2012 | Quantaray AF 70-300mm f/4.0-5.6 High Speed...

2 Answers

Want an adaptor for a Nikon D80 to fit canon lenses

Not realistically possible, due to the incompatible lens to focal plane distances. If you found one it would either not allow infinity focussing or would need to incorporate corrective optics which add cost and ruin image quality.

All such adapters mean that the AF won't work, and focussing and image composition must be done with the aperture fully open before manually closing the aperture down to the desired value for metering and shooting. With Nikon G lenses the aperture is fully electronic, so the lens would only be operable at its smallest aperture.

You can get an adapter to allow Nikon to Canon EOS though, but as both cameras have plenty of excellent quality new and used lenses and resale values are high it's a pointless exercise.

Jul 26, 2011 | Camera Lenses

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Can i increase the focal length of the 75-240 lens if i add a mount or something like that? Please let me what you suggest.

Hi. Yes, you can increase your focal lenght with photo converter x1.4 or photo converter x2 so it would be 105-336mm with x1.4 and 150-480mm with x2. But consider that mounting such converters you increase the minimal aperture. Thus you will have to use higher ISO or longer shutter speed.

Apr 28, 2011 | Nikon 75-240 F4.5-5.6D AF ZOOM-NIKKOR Lens

1 Answer

When i attatch my 70-300 lens i get a flashing FEE in the box,the book says to set the minimum aperture how do i do this please.

Thanks for the additional info.

First, an apology: I misread the lens description, sorry. If you have the "AF 70-300mm f/4-5.6 ED Nikkor" then the lens DOES have an aperture ring at the rear of the lens. If this is the case, then your D50 is compatible and all you need to do is turn the aperture ring on the lens until it's at the minimum f32 setting. The "FEE" message on your D50 should then vanish. When set this way, you control the aperture setting on the lens via the camera body controls. The command wheel alone adjusts the aperture when in Aperture Priority mode, and in Manual or Shutter Priority modes you need to first press the " /-" button behind and to the right of the shutter release before using the command wheel. There's even a handy little printed icon of a lens diaphragm to remind you of the secondary function of this button.

If your lens model is the "Nikon 70-300mm f/4-5.6G" then like a G lenses it lacks an aperture ring and so can only be controlled by Nikon bodies which operate the aperture from the body alone, like yours. So if you're getting the FEE error with a G lens then there's most likely a common fault which occurs with Nikon bodies with a small switch beside the lens mount. In the picture (courtesy and copyright of Digital Photography Review), the switch is at the 8 o'clock position.

This switch is activated either when a non-G lens aperture ring is turned to the smallest setting or when a G lens is correctly mounted. It is possible for the G lens to be damaged in such a way that the switch doesn't get activated but it's rare. If the switch is broken the camera body will need a repair.

Hope this answers your question, but if not add further comments. If it has answered your problem then please let me know by rating my reply.

Sep 14, 2010 | Nikon AF 70-300mm f/4-5.6 ED Nikkor Lens

1 Answer

Using Nikon d50 camera, I turn it on and blinking in display is FE E. It goes away but when I push button to take picture same blinking FE E shows up and won't take picture.

Turn the aperture ring on the lens to its smallest setting (largest f/number). You can control the aperture from the camera body, the same was as with a lens without an aperture ring.

Aug 21, 2010 | Nikon AF 70-300mm f/4-5.6 ED Nikkor Lens

1 Answer

Aperture not going below 6

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.

Aug 16, 2008 | Tamron 18-200mm f/3.5-6.3 for Nikon

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