Einschlaglupe D 40 205171-9200.000 057L09
The Zeiss 10X triplet has a 13mm diameter glass lens with a field a view that is almost the entire 13mm. Other triplets may have larger diameter lenses, but they won't have a larger field of view. This triplet also has a anti-reflection coating.
The Zeiss 10X triplet is housed in a plastic casing to protect from damage in accidental falls. This is the only 10X triplet we sell that comes with a owners manual. Here are some selections from that manual:
This Zeiss magnifier which you have purchased is a high-performance, top quality optical product....The maximum diameter has been selected by Carl Zeiss for the power of your magnifier. The field of view is therefore exceptionally large for the magnification power......The shape and the function of the lens system in your magnifier are the result of the latest research in the field of optics. The aplanatic-achromatic design of the lens systems provides you with a field of view which is practically free of distortion and chromatic aberrations right into the peripheral zones.
The loupe measures a compact 25mm x 38mm x 15.5mm thick when closed, and has a 2.5mm hole thru the rivet for hanging the loupe from a chain if so desired.