605-400
WF5x eyepieces, Field No. 22

610-400
WF10x eyepieces, Field No. 20

615-400
WF15x eyepieces, Field No. 13

620-400
WF20x eyepieces, Field No. 10

705-420
0.5x objective lens, reduces magnification by 50%, increases working distance from 79mm to 137mm, doubles field diameter.

775-420
0.75x objective lens, reduces magnification by 25%, increases working distance from 79mm to 90mm, increases field diameter by 33%.

715-420
1.5x objective lens, increases magnification by 50%, reduces working distance from 79mm to 34mm, reduces field diameter by 33%.