Please find here our frequently asked questions. Should you have further questions please use our contact page.


Technical Questions

Tele-converters in general, including Tamron brand converters, are mainly intended for use with fixed focal length lenses and lenses that have a fast f value, such as our AF 90 mm f/2.8 (model 272E) and AF 180 mm f/3.5 (model B01).

If additional lens elements are introduced into an optical system, as done with the use of a tele-converter, the image quality of the whole system is negatively affected. Less light enters the lens when using a tele-converter. In the case of a 1,4x converter you lose one stop and with a 2x converter two stops. To assure correct functioning of the camera, lenses with an f value of minimum 4.0 are necessary.

We do not recommend the use of conventional Tamron lenses on digital SLRs, as the resulting image quality does not meet the accustomed high quality standard that Tamron lenses deliver.

Generally, it is combinable but should be used in the central focusing field of the respective camera. Tamron has developed special lenses for the high requirements of digital cameras. These have a high resolution, coupled with the best possible correction of the most common aberrations, such as peripheral light fall off and chromatic aberration.  Particular emphasis is placed on the lens coating in order to minimize the increased risk of ghosting and flare with digital cameras.




The designation “Di” (Digitally Integrated Design) marks a generation of lenses, which have been specially adapted to the requirements of digital SLR cameras. Tamron’s Di-II lenses are designed exclusively for digital SLR cameras with APS-C size imagers (24x16mm or smaller).



High power zoom lenses use Internal Focus ( IF) systems to shorten theMinimum Focus Distance. When an IF system is used in the optical system of a lens with a wide to tele range, the magnification ratio at telephoto is shortened when you shoot closer to the MFD. When pictures are taken at a close focusing distance with a zoom lens at its telephoto end, the zoom lens covers a wider angle of view than would a fixed telephoto lens. However, since the focal length of any lens is based on the focusing distance at the infinity setting (and Tamron’s high power zoom lenses provide the same angles of view as other telephoto lenses at the infinity setting), this phenomenon is not a defect or flaw in a zoom lens.



The 90mm macro lens is designed to extend its front group largely toward the subject in close-up macro photography. In that situation, the amount of light reaching the film decreases. The aperture displayed stays the same in most cameras, but some SLR cameras are equipped with a feature that shows the effective f-values, and smaller open aperture values are displayed when the lens barrel is extended for close-up photography. This phenomenon is not a lens defect or flaw, but is a camera characteristic.




Tamron puts the macro designation on all lenses that have a maximum close-up capability of 1:4 (0.25x) or larger, regardless of the lens type. However, there is a difference between a macro lens and a zoom lens in the image quality for close-up photography. In designing a macro lens, the emphasis is put on image quality and performance to provide a high image quality and an attractive out-of-focus background effect in close-up photography, while maintaining sufficient performance in general photography for portraiture or scenery. On the other hand, in designing a zoom lens with a macro feature, emphasis is put on high image quality in general photography while equipping the lens with a convenient close-up capability.




The depth of field is an optical characteristic of a lens and cannot be changed or adjusted.

It depends exclusively on the focal length, aperture, subject distance and the circle of confusion which in turn is dependent on the imager format.




There is probably a front/back focussing issue with your combination of equipment.

If your camera has already been checked and aligned by the manufacturer but this did not rectify the problem, you can send the unit (lens and camera) to our service team. Within the scope of our capabilities, our service team will then align the lens to the camera. 

The third party camera will not be interfered with in any way during this process; it will merely be used to take a reference photograph.


Model B018 uses an electromagnetic lock method locking the VC lens in the center of optical system using electric power supplied by the camera. Therefore, when the camera power is turned on or the shutter button is pressed halfway, the viewfinder image will move but is not a malfunction. When shooting with the camera fixed on a tripod, turn on the camera power and decide the composition with the shutter button pressed halfway.