looking for the close up lens

[camera24]

Hello,
I have a CCD camera with Micro-Nikkor 60mm f/2.8D. This setup at the working distance of 10cm gives me the FOV 30mm. But I need the FOV of 15 mm, and I cannot move the camera any closer to the object. Could you please tell me which lens or extension or a combination of both should I buy to get FOV of about 15 mm (1.5 cm) at the working distance not closer than 10 cm?
Thank you

 

[bjornl]

Given that you use a Nikkor, why not use a Nikon tele-converter. Since you want to double the magnification, you will need to use a 2x TC. Nikon's own work best (least image degradation).