20 Most Recent Tamron Macro 90mm f/2.5 Manual Focus Adaptall Lens Questions & Answers

Having gone over threee months without a response, I assume this is no longer a problem.

I'm not sure of the exact model number of your lens, but the hood should have a bayonet flange and rotating it in one direction or the other should allow it to then simply pull off.

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.

Set up focus point using autofocus, then set camera to manual focus before attaching filter, and be careful not to move focusing ring.

First, I'm not a TAMRON Tech. * Check your warranty and call for service. * Ah, Found this on you tube. (VERY Technical!) https://www.youtube.com/watch?v=o9dvQmVAhK0 * Strongly suggest you have this lens serviced. Aloha, ukeboy57

You'll need to send it to a lens repair service. Do not attempt to disassemble the lens yourself; you'll only make the problem worse and may damage the lens beyond repair.

Use the settings that will give you the best exposure / shutter speed / focus

This is a bit off the wall, I know, but have you contemplated taking the drastic step of getting the lens mended ?

Tele convertors on their own do not focus - that is achieved by the lens. Are the lens contacts clean and correctly aligned with those in the camera ?

Go to the tamron site and find the nearest repair centre to you location

This is the UK service centre http://www.tamron.eu/uk/service/repair-service/