This NEW product you are browsing has been inspected by our certified technicians to ensure that it meets factory specifications. It is guaranteed to be in perfect working order but it is sold in "AS IS" condition (for example, the box may be torn, etc) and returns will not be accepted. Please contact us with any questions BEFORE placing an order.
We accept PayPal and all major credit cards. We do our best to describe each item we are selling to the best of our ability. Bear in mind that the Item is sold as-is with no warranty. Use the "contact us" page to request additional info or images on this product.
The SP AF PRO-series teleconverters, with a newly designed optical construction (4-group/5-element for 1.4X and 4-group/7-element for 2X), are designed to be used with lenses that are F/2.8 and of focal lengths of 90mm or greater. This would make the use of the SP teleconverters ideal for the Tamron SP90mm F/2.8 macro, 70-210mm F/2.8 and 300mm F/2.8. Relative illumination is significantly improved resulting in better overall contrast and resolution across the entire image field. In addition, chromatic aberration and astigmatism are better compensated for by virtue of the use of higher-grade glass materials and more sophisticated design techniques than used in universal-type teleconverters. When used with lenses with smaller maximum apertures (F/4 and F/5.6, for example), there will be little difference in image quality as compared with the standard Tamron teleconverters. When used with lenses wider than 90mm, the SP teleconverters can actually comprise image quality.The 2X doubles the focal length of the master lens and makes the lens two f-stops slower. In addition to increasing focal length, this teleconverter allows greater magnification in macro since the Minimum Object Distance (MOD) of the master lens does not change when used with the teleconverters. AF will be retained with the 2X teleconverter if the master lens is F/4.0 or faster.
- Construction: 7 Groups/ 4 Elements
- Dimensions (Length x Diameter): 43.5mm x 68.5mm
- Weight: 184g