Question about Tamron Cameras

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I have an older 70-210 zoom lens with an Adaptall-2 OM mount. The zoom is a push-pull type with significant creep. How do I fix this, are there manuals to show what screw(s) to adjust? Cheers

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There is no fix, they were like that from new.

Posted on Sep 29, 2010

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Simple idea? Dont go to F32..just stay at F22 and increase the camera speed one stop.
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What mount do you have on the Tamron lens? (The built-in mount.) If it has a Nikon mount, you don't need an adapter at all. If it has the Adaptall mount then the adapter should fit onto the back of the lens, then the combo should fit onto your Nikon camera. If the lens has a different mount then nothing you can do will make it fit.

Does the adapter fit onto the lens?

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2 Answers

I removed my lens and now when i fix it back, the shutter gets stuck in the mirror up position. when i remove the lens again, the mirror swings back without any problem.


Sorry, but if you have no access to other lenses then there isn't any definite way to isolate where the fault is. New batteries aren't the answer as on your model they only power the light meter.

It's very likely to be a lens fault, especially if using either of the two lenses which Cosina usually supplied (the OM2000 is actually a rebadged Cosina with an OM mount and OM viewfinder surround) but that's just a best guess based upon experience. The Cosina lenses have an OM mount and badging, but they are very cheaply made and tend to fall apart. The tiny lens stop screw is a common loss to almost all OM lens models and it prevents the lens from being turned too far when mounting it onto the body. Without the screw, the lens only has to be a tiny bit over-rotated to cause faults similar to yours.

If you hold the lens and look at the mounting with the top of the lens pointing up at the 12 o'clock position, then the screw in question should be just clockwise of the bottom bayonet lug at about the 6:30 position. It's about 1.2mm in diameter and stands proud about 0.8mm. If there's a hole there then the screw has fallen out. Replacing the screw is awkward as the Cosina lenses use screws which are not interchangeable with "real" OM mount lenses, but it only acts as a peg so it's often possible to replace it by epoxy gluing in a short peg of bronze or steel. Temporarily glue the peg before final fixing though as it may need trimming to get it just right. The Cosina lenses also tend to shed screws internally causing either the aperture coupling lever or the stop down lever to be out of their correct positions.

Good luck, and please take a moment to rate my reply.

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1 Answer

Hi, can tell to me why my 18-200 af vr lenss go


The "problem" is that the lens has a zoom creep issue. If you are the original purchaser, and the lens is under 5 years old, you may want to contact Nikon repair facilites in Melville or El Segundo to have it checked out.
Some users on forums have claimed that Nikon fixed the plastics ring that contribute to the zoom creep. Apparently, using a rubber band around the zoom ring will minimize the problem.
Hope this helps,
Andrew

May 14, 2010 | Nikon D80 Digital Camera with 18-200mm...

1 Answer

No lens lock on a Sigma 135-400DG, falls to full extension.


buy the glass that does not zoom via push pull - When they get old and sometimes right off the shelf new the push pull zooms get loose - the only fix is for you to have it serviced and even then it is a temporary fix as the very nature of what you do to use the zoom will ultimately cause the same problem to occur.

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1 Answer

75-250mm F3.8-4.5 tamron lens compatible to a


As long as you can get the correct Tamron Adaptall 2 mounting for it, then it will fit. They're no longer made and not always easy to obtain at reasonable prices.

Adaptall 2 mounts for Minolta autofocus were never made, but the earlier MD mounts were, and they will fit any Minolta or Sony SLR. Obviously, there will be no autofocus but you will also find that you have to focus with the aperture ring wide open and then manually meter and take the shot after you have selected the aperture which you require.

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1 Answer

Tamron 90mm 2.5 adaptall man focus lens


You probably have to set the aperture manually on the lens, because it might not have CPU contacts. I think changing the aperture on the camera will probably have no effect, so just try twisting the aperture ring to wide open.

You usually have to set the aperture at the minimum setting (highest number) so that if the camera is choosing the aperture, it can stop down to the required value.

No good having it set at f2.8 if the shot needs f11.

If the lens is very old, it might have a manual iris that you have to set yourself on the lens. The lenses that stop down automatically will have a tiny peg on the mount that a suitable camera can operate. Gentle pushing of this peg while looking through the lens will tell if it is stopping down - set it wide open first.

If you have a depth of field preview button, this will also have the same effect with the lens on the camera if the body matches up with the lens.

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1 Answer

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The zoom creep is an easy fix for Canon. I really do not recommend trying to tighten it yourself, since that would void your warranty.
It is usually free to tighten the zoom ring.
/Chris

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1 Answer

Lens adapter


I went on E-bay and searched "lens adapter olympus om to nikon and got seven (7) hits in the $12 to $20 range. You will need to specify the type of Nikon mount.

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