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Tamron 1.4X SP 140F-FNS (For D Telephotos F/5.6 & Faster) Teleconverter for Nikon

KEH Model# 217312
Grade Notes Price Qty


Tamron 1.4X SP 140F-FNS (For D Telephotos F/5.6 & Faster) Teleconverter for Nikon Description


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.

KEH Specifications

  • Magnification: 1.4x
  • Compatible Lenses: Nikon D-type Telephoto lenses with f/5.6 aperture or higher
  • Elements/Groups: 4/5
  • Lens Diameter: 2.7"
  • Length: 0.7"
  • Weight: 4.7oz


General information

Manufacturer Part Number AF14PN-700
Manufacture GTIN 0725211147138
Brand Name Tamron
Product information
Lens Construction
5 Elements in 4 Groups

Nikon AFD Lenses

Lens Type
  • Telephoto

Physical Characteristics

Lens Mount Nikon F Mount Ai, Nikon F Mount Ai-S, Nikon F Mount Ai & contacts (Ai-P), Nikon F Mount AF (pre-D), Nikon F Mount D Type, Nikon F Mount "G" Type