effective focal length of two lenses

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
effective focal length of two lenses	0.45	0.6	1233	20	36
effective	0.34	0.9	7717	32	9
focal	0.21	0.8	752	15	5
length	0.99	0.8	6450	97	6
of	0.09	0.3	9795	37	2
two	1.54	0.9	3484	40	3
lenses	0.75	0.4	3928	63	6

Keyword	CPC	PCC	Volume	Score
effective focal length of two lenses	0.38	0.6	1379	25
effective focal length of two lenses formula	1.84	0.8	5799	2
focal length of two lenses	1.69	0.3	6609	98
equivalent focal length of two lenses	0.89	0.1	989	25
focal length of combination of lenses	1.48	1	4184	41
effective focal length vs focal length	1.43	0.1	9650	62
two thin lenses of focal length	0.72	0.7	4724	14
focal length of combined lenses	1.09	0.1	1723	94
lenses and focal length	0.13	0.6	9749	27
comparison of lens focal length	1.49	0.7	4594	36
focal length of lens combination	0.27	0.7	5027	61
what is effective focal length	0.23	0.5	960	68
combining lenses focal length	0.2	1	8099	33
focal length of eye lens	0.14	0.5	9734	36
camera lens focal length comparison	1.92	0.6	1296	22
longer focal length lens	1.77	0.6	8600	96
what lens has multiple focal lengths	0.53	0.5	7721	57