Product Description Teleconverters, either 1.4X or 2X, are efficient tools to add focal length to the photographer's arsenal. However, universal-type teleconverters have certain limitations in performance when used with ultra-telephoto lenses of 200mm or longer as compensation of chromatic aberration alone becomes highly critical in this focal length range. The new PRO-series teleconverters are specifically designed and optimized for use with such ultra-telephoto lenses to deliver maximum resolution, contrast and color rendition without degrading any aspect of the master lens performance.The 1.4X teleconverter will increase the focal length of the master lens by 1.4X and make the lens one f-stop slower. The 2X doubles the focal length of the master lens and makes the lens two f-stops slower. In addition to increasing focal length, both teleconverters allow greater magnification in macro since the Minimum Object Distance (MOD) of the master lens does not change when used with the teleconverters.The 1.4X teleconverter can be used with both AF and MF lenses. AF will be retained if the master lens is F/4.5 or faster. AF will be retained with the 2X teleconverter if the master lens is F/4.0 or faster.
Customer Reviews:
Pretty affordable solution in absence of long focal length lensMarch 28, 2008 Alap Dave 10 out of 10 found this review helpful
This is a very good solution if u dont want to spend $$ for long telephoto. This can be used on Digital SLR I use it with D80 one of the reviewer has mentioned mumbo jumbo written by Tamron which they have to because this is not designed for digital camera but that doesnt mean it can not be used. AF will work but will be slow and hunt so be prepared to do manual focusing. I use it for nature and wildlife photography and has clicked descent quality pictures with my skill level. I use it with Tamron 75-300 mm and this teleconverter makes it 600mm pretty descent range for the purpose of wildlife photography. It will slow down lens by 2 f stops so u will need very low shutter speeds or pretty good light.
In short it can be used effectively if you really know what you are doing and obviously something like this is difficult to use at 600 mm handheld so more often than not you will have to use tripod but when you compare the cost advantage it is a no brainer for a newbie or a hobbyist not wanting to spend too much.
4 starts because it is not a perfect solution but it is not even supposed to be so read it as 5 stars if you understand the limitations of this thing.
Information on Tamron Autofocus 2xMarch 24, 2008 Richard W. Paasch 6 out of 8 found this review helpful
This product was purchased to use on a digital camera. Upon opening the package, item #3 on the instructions states: This teleconverter is not designed for digital use. We do not guarantee its performance when used on Digital SLR cameras." This information is not presented in the on-line information or the Amazon web- site. Misleading!
Tamron autofocus 2x teleconverterFebruary 26, 2008 Jean A. Mccormick(Long island) 5 out of 5 found this review helpful
Was delivered as promised. In the condition as promised. My only complaint is (this was explained in the review) If it is not bright enough light meter will not work. Must be a bright sunny day.
