TAMRON SP FLAT-FIELD 2× TELE-CONVERTER 01F This is the TAMRON 2x teleconverter SP01F from the Adaptall 2 era. When attached to the TAMRON SP 90mm F2.5 52B, it can be used as a 1:1 macro lens. [Exterior] Overall in beautiful condition, but there are some minor stains on the mount. This does not affect use. [Optics] Overall clear optics. There is some minor dust that does not affect the image quality. There are some faint wipe marks on the rear lens element. *Please read the profile before purchasing. *Since this is a personal inspection, there may be some issues that I have not noticed. I will respond to any questions, so please feel free to ask. [Important] If you would like to request a price reduction, please be sure to include your desired price. Also, if the price is not agreeable and you are unable to purchase, please be sure to reply. I will not respond to silent price reduction requests using the price reduction request function. I am having trouble with many frivolous price reduction requests, so if you do not follow these instructions, you may be blocked.