Question about Tamron 28-200mm f/3.8-5.6 LD Aspherical IF Super II Macro Autofocus Lens for Minolta

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Tamron 28-200 AF Aspherical LD. Does it have manual focus? If yes, where?

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There should be a switch just in front of the back of the lens marked "AF" and "M". Set it to M for manual focus, AF for autofocus.

Posted on Jan 20, 2010

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I bought the new Tamron 20-200 lens and after trying it on my Canon 7D non of my lenses will focus on that camera. What has happened?


Sure you did not switch to manual focus while testing the Tamron? Sure all settings are correct?
If the Tamron still auto focusses on you 7D, check the forums about this. I know Nikon sometimes messes up the firmware, when a non Nikon lens is used, but not on all camera's. And not with every firmware.
I don't know the 7D enough to check more details, but check everything about the AF settings. I can't imagine your lens did something wrong with the camera.

Jan 07, 2015 | Canon Cameras

1 Answer

Fixing a seized AF motor


One theory on this is that the camera's software or settings may somehow be corrupted, so you should go through the process of resetting the camera to its original factory settings. If that does not clear up the problem, try another AF lens and conform whether the problem is the lens or the camera body. If the camera is not focusing another lens, then you may need to clean the contacts or look for some sort of damage.

If it turns out that it is the lens, the best solution is to send it to Tamron for service and see what they can do about it.

If you cannot send it to Tamron, you ought to see whether it is something as simple as some sort of internal dust or dirt collection blocking the mechanical switches and functions of the lens.

Start with making sure that you have a fully charged battery for the camera or AC power adapter for the camera. You do not want any of the problems with the camera to be related to having too little voltage available.

Make sure that the camera's power switch is switched off. You do not need to have the battery or adapter connected just yet.

Next, with the lens off of the camera, switch back and forth several times, firmly, between AF and MF and switch the vibration compensation off and on a few times. Of course, do not drop the lens. Also, unless you need the zoom ring locked, you may want to make sure that the zoom ring lock is fully off. While you are doing this, or after switching back and forth, check the electrical contacts on the lens and the camera body. If anything looks even a little less than shiny, clean the contacts.

With the camera's power still switched off, put the lens back on the camera.

Either put the battery in the camera or connect the AC adapter.

Set the lens to AF with vibration compensation off.

Switch the camera's power on.

Try getting the camera to automatically focus on something. If it works, turn the camera's power off, then switch vibration compensation on, then turn the camera's power on and try again. It may be fixed, at this point, which means that you can ignore the rest. Otherwise:

Turn the camera's power off again and switch to manual focus. Turn the camera's power back on and rotate the lens's focus ring (gently) all of the way through the focal range two or three times. Try taking one or two pictures, just to be sure that everything is working in manual. Turn the camera's power off and switch the vibration compensation, then turn the camera's power back on. Gently rotate the focus ring all of the way through the focal range two or three time, and then take two or three pictures to verify that everything is still working in manual.

After that, turn the camera's power off and switch back to AF with vibration compensation off. Turn the camera's power back on. Try to get the camera to automatically focus on something. If it works, then turn the camera's power off and switch vibration compensation back on again. The turn the camera's power on and try to get it to automatically focus on something.

If all of this works, than you should be okay with it as it is. You may still want to send the lens in to Tamron to get it serviced, in case the problem was some sort of lint or dirt getting caught up in the gears or servo that moves the lens through the focal range.

If it does not work, you could try to force the lens to re-engage the autofocus servo. It will probably void your warranty, if you still have one, so you are better off send it in to Tamron for service, first, before trying it. Also, as the manual and common sense would indicate, if you try to force the lens to adjust its focus ring while it is switched to AF, you could easily break the mechanism in the lens.

With that being said, some people claim that they got their lenses to return to proper autofocus by leaving the lens switched to AF and trying to rotate the focus ring manually. One person says not to "force" it, his just took a "firm push". I have not tried this, so I do not have advice on how much force may work or how much will damage the plastic bearings, gears and teeth inside the lens.

May 04, 2014 | Nikon D60 Digital Camera

1 Answer

Is there a converter so a Tamron AF Aspherical LD 28-200mm lense fits a Cannon EOS 550D


I use B&K camera supply in New York. If it is available, they will know for sure. There are about 10,000 different cross matches possible but without having all the specs, I won't tell you something that I just 'think' is right.

Dec 23, 2012 | Cameras

1 Answer

Please help. Want to buy a Pentax K7, will these lenses work. Pentax-F Fish-eye 1:3.5-4.5 17-28 TAMRON AF 70-300 1:4-5.6 LD Tele-Macro 1:2 Sigma APO 170-500 1:5-6.3 My exist camera is a Pentax MZ-50


yes they will, I have a 70-300 myself.

As a rule, ANY k-mount lens will work on any of the new pentax cameras to some extent.

At any rate you can shoot some very nice pic with even the oldest lenses. Manually ofcourse.

With an adapter you can even use m42 screw lenses too.

Dec 11, 2010 | Pentax K7 Digital Camera

1 Answer

Automatic focus not working


The D40x only autofocuses with the latest AF-S (and old professional AF-I) lenses. Most traditional (screw-type) AF lenses from 1986 through today will not autofocus on the D40x. If your lens says "AF-S," you're fine.
Most lenses sold today for the D40x are AF-S, and so is the included 18-55mm kit lens. Many non-Nikon lenses from Tamron, Tokina, Quantaray, Sigma and anyone other than Nikon still won't autofocus on the D40x. Try before you buy, but honestly, there isn't much the included 18-55mm lens won't do.
Autofocus systems are fast, but not usually instantaneous. You have to hold the shutter down halfway as you compose the first shot so the AF system can focus and lock, and then the camera fires instantaneously when you press the shutter the rest of the way. See Preventing Shutter Delay for more.

Jul 14, 2009 | Nikon D40x Digital Camera

1 Answer

Sony a100 match ups


Yes, when Sony took over Konica Minolta they inherited the Maxxum lens mount (Minolta's AF lens mount system). the only Minolta lenses which don't work are the earlier manual focus type.

Sony have finally launched three new models which are the first to be clearly Sony designed, but they have still retained the Maxxum lens mounting.

Jul 03, 2009 | Sony Alpha DSLR-A100 Digital Camera

3 Answers

Nikon D40X stopped auto-focusing yesterday


I had the same problem. My issue was with all my lenses. I solved it by going to the menu and selecting the custom setting menu (pencil icon). Then from the right menu select the AE-L/AF-L and press OK. Then make sure it is set on AE/AF Lock. Presto...all my lenses worked on auto-focus.

Feb 24, 2008 | Nikon D40x Digital Camera

1 Answer

On Camera Flash Problem and Lens Question


According to Pentax, the pop up flash does greatly reduce battery life. So, if you want them to last longer, use an external flash. The built-in flash is too low powered an too prone to produce red eyes to be of much use anyway. Any lens that goes from 28-300 is going to be much less sharp than one with a shorter zoom range, even if the lens designer uses such heroic measures as aspherical elements and LD glass. Consider the Tokina AT-X 24-200mm f/3.5-5.6 lens as a very good alternative to the Tamron.

Sep 08, 2005 | Pentax *ist D Digital Camera

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