...*

- focal length of microscope eyepiece = 250/x mag.

- carl zeiss e-pl 10x / 20 = 25mm 1set
- nikon 10x = 25mm 2set
- olympus 15x = 16.7mm 1ea
- nikon c-w 30x/7 = 8.3mm 1set
- union wfh 15x = 16.7mm 1set

	meade 90mm(fl=900)	viper 90mm (fl=1200)	mizar 80mm (fl=400)
8x = 31mm	28.8	38.4	12.7
10x = 25mm	36	48	16
15x = 16.7mm	54	72	24
20x = 22.5mm	72	96	32
30x = 8.3mm	109	144	48
uw 6	150	200	66.7
uw 20	45	60	20
lv 40	22.5	30	10

- lx 200 10inch f/10 sct
- x83.3 
- x100
- x150
- x111
- x300

- x417
- x125
- x62.5