Specification	J-Y1	J-Y1T	J-Y1A	J-Y1AT
Viewing head	Compensation free Binocular Head . Inclined at 4 5 ° ( 50mm -75mm )	●	/	●	/
Compensation Free Trinocular Head . Inclined at 45 ° ( 50mm -75mm )	/	●	/	●
Eyepiece	WF10X/ 20mm	●	●
WF10X/ 22mm			●	●
WF10X/ 18mm with Cross graduation of 0.1mm scale	○	○	○	○
Objective	Long working distance plan objective	LWDPL4X/0.1W.D .25mm	●	●	/	/
LWDPL10X/0.25 phase contrast W.D .11mm
LWDPL20X/0.4 phase contrast W.D .6mm
LWDPL40X/0.6W.D. 3.8mm
Distance infinity plan objective	LWDPL4X/0.1W.D .29.4mm	/	/	●	●
LWDPL10X/0.25 phase contrast W.D .16mm
LWDPL20X/0.4 phase contrast W.D .10.5mm
LWDPL40X/0.6W.D .5.4mm
Long working distance objective	LWDPL10X	○	○	○	○
LWDPL20X	●	●	●	●
Long working distance phase contrast objective	LWDPL40X	○	○	○	○