Using a fairly wide aperture is also helpful in blurring out unwanted background elements.
1	Using	use	VERB	VBG	VerbForm=Ger	8	csubj	8:csubj	_
2	a	a	DET	DT	Definite=Ind|PronType=Art	5	det	5:det	_
3	fairly	fairly	ADV	RB	_	4	advmod	4:advmod	_
4	wide	wide	ADJ	JJ	Degree=Pos	5	amod	5:amod	_
5	aperture	aperture	NOUN	NN	Number=Sing	1	obj	1:obj	_
6	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	8	cop	8:cop	_
7	also	also	ADV	RB	_	8	advmod	8:advmod	_
8	helpful	helpful	ADJ	JJ	Degree=Pos	0	root	0:root	_
9	in	in	SCONJ	IN	_	10	mark	10:mark	_
10	blurring	blur	VERB	VBG	VerbForm=Ger	8	advcl	8:advcl:in	_
11	out	out	ADP	RP	_	10	compound:prt	10:compound:prt	_
12	unwanted	unwanted	ADJ	JJ	Degree=Pos	14	amod	14:amod	_
13	background	background	NOUN	NN	Number=Sing	14	compound	14:compound	_
14	elements	element	NOUN	NNS	Number=Plur	10	obj	10:obj	SpaceAfter=No
15	.	.	PUNCT	.	_	8	punct	8:punct	_
