Nikon 105 mm f/2.8 Manual-Focus Micro-Nikkor

Magnification Subject distance Correcting Lens Extension tube    
Near focus Far focus Near focus   Far focus   Focal Length diopters      
                       
0.49 0.00 10.83 in Inf   None   0.00 0    
0.80 0.26 8.08 in 19.92 in None mm 0.00 27.5 mm PK-13, M-ring
1.07 0.50 6.93 in 12.40 in None mm 0.00 52.5 mm PN-11
1.10 0.52 6.84 in 12.03 in None mm 0.00 55 mm 2 PK-13s
1.37 0.76 6.19 in 9.56 in None mm 0.00 80 mm PK-13 + PN-11
                       
0.73 0.16 7.34 in 26.25 in Nikon 3T   1.50      
0.95 0.30 5.64 in 13.58 in Nikon 4T   2.90      
                       
1.08 0.46 5.96 in 11.32 in Nikon 3T   1.50 27.5 mm PK-13, M-ring
1.34 0.65 4.79 in 8.07 in Nikon 4T   2.90 27.5 mm PK-13, M-ring
                       
1.40 0.74 5.31 in 8.42 in Nikon 3T   1.50 52.5 mm PN-11
1.70 0.96 4.36 in 6.48 in Nikon 4T   2.90 52.5 mm PN-11
                       
1.75 1.04 4.87 in 7.01 in Nikon 3T   1.50 80 mm PK-13 + PN-11
2.10 1.30 4.06 in 5.61 in Nikon 4T   2.90 80 mm PK-13 + PN-11


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Jim Kasson