The AML (1.6+) Sigma  achromat close up

Before buying the 5T I used extensively the Sigma AML achromat close up lens coupled with my zooms. It is a 2 elements achromat with filter thread of 58mm and was once sold by Sigma as an optional for its  70-210 or 70-300 zooms . Its diopter value is around +1.6, slightly more than the Nikon 5T (+1.5).

I bought it in a second hand photo market for the equivalent of 7 euros:

despite its cheap price it performs well.

A little test of the Sigma AML on the Nikkor 70-210 F4-5.6 Af (on D70) compared with the 5T I bought later also to avoid the need of the 62-58 step down ring:

 The Nikkor at 210mm f11 minimum focusing distance with SB 600 flash

                            Sigma AML                                                         Nikon 5T

Nikkor at 210 focused at infinity coupled with the AML (left) and with 5T (right):

100% crop for the Sigma 

100%crop for the 5T

                     Sigma AML                                                     Nikon 5T

The Nikkor at 210 mm focused at minimum focusing distance coupled with AML and 5T

          100% crop for the Sigma AML                                    100% crop for the 5T