50mm f1.8


Dec 14, 2008
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#1
Hey guys I just got a 50mm f1.8 prime lens yesterday second hand and when it focuses, there is some noise coming out from it. Is this normal for other prime users using this lens?:confused:
 

Rashkae

Senior Member
Nov 28, 2005
19,105
12
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#2
Of course there will be noise. It's the focusing gears. You would need to have a very high-end lens for focusing to be almost silent.
 

Dec 14, 2008
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#3
Of course there will be noise. It's the focusing gears. You would need to have a very high-end lens for focusing to be almost silent.
Oh okay so nothing to worry about with the loud focusing noise then? :thumbsup: thanks for clearing my doubt :cool:
 

CS TAN

Senior Member
Sep 3, 2007
3,663
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Hong Kong
#4
Canon basically uses 2 different kinds of motors in their lenses. The micro motor and ring ultrasonic motor (USM). 50mm f1.8 uses the cheaper micro motor and this tends to have a bit of noise when focusing.
 

Reportage

Senior Member
Nov 24, 2008
5,785
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#5
thing is, $130-ish for a f/1.8 lens...i dont think anyone will complain on a little noise.
 

dougs

New Member
Jun 7, 2010
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#6
for budget lenses, you can't expect too much I guess. But really depends on how "loud" the sound is.

Nevertheless, we tend to be slightly more sensitive to anything we bought second hand.
 

Octarine

Moderator
Staff member
Jan 3, 2008
12,492
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Pasir Ris
#8
Nevertheless, we tend to be slightly more sensitive to anything we bought second hand.
Only 'second hand'? Some people here freak out over dust inside a newly purchased lens, expecting the level of cleanliness one can find in semiconductor production facilities... Others demand a consumer camera model with absolutely zero shutter count. :dunno:
 

watermaze

New Member
May 12, 2009
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#9
This lens is known to be loud and dusty, so nothing to worry about. Despite of that, the image quality is excellent. Get a EF50mm f/1.4 USM if you want silent AF.

Besides, this lens is made of plastic (except for the lens elements), so expect it to break if you drop it... :sweat:
 

Halfmoon

Senior Member
Feb 26, 2005
4,590
6
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Hougang, Singapore.
#10
This lens is known to be loud and dusty, so nothing to worry about. Despite of that, the image quality is excellent. Get a EF50mm f/1.4 USM if you want silent AF.

Besides, this lens is made of plastic (except for the lens elements), so expect it to break if you drop it... :sweat:
It will break upon a fall... tested by me... accidentally of course.... and now, missing the 50mm range.... :bheart:
 

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giantcanopy

Senior Member
Feb 11, 2007
6,232
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SG
#11
Yup the last i tried one, the AF was a little noisy. But this plasticky lightweight lens is extreme value for money and the AF is pretty fast!

Just make sure u run the usual checks for pre-loved lenses to make sure they are working fine.

Ryan
 

StrifeYun

Senior Member
Nov 15, 2006
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Rivervale Drive
#12
lens in general for canon, if the front berrel rotates in a circular motion it will most probably have noise
2 cents.
 

watermaze

New Member
May 12, 2009
70
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0
#13
lens in general for canon, if the front berrel rotates in a circular motion it will most probably have noise
2 cents.
Hmmmm.... I think this doesn't apply to our beloved EF 50mm f/1.8 II - it's front barrel does not rotate during AF... ;)
 

ST1100

Senior Member
Jun 18, 2003
1,785
0
0
Singapore, Bedok
#14
Canon basically uses 2 different kinds of motors in their lenses. The micro motor and ring ultrasonic motor (USM). 50mm f1.8 uses the cheaper micro motor and this tends to have a bit of noise when focusing.
This lens is known to be loud and dusty, so nothing to worry about. Despite of that, the image quality is excellent. Get a EF50mm f/1.4 USM if you want silent AF.

Besides, this lens is made of plastic (except for the lens elements), so expect it to break if you drop it... :sweat:

There are also different kinds of USM. The 50/1.4 drew the short straw and landed up with the noisiest one... it's not much quieter than the 1.8. In fact it's one of the very few (clearly) audible USM motors.
 

Halfmoon

Senior Member
Feb 26, 2005
4,590
6
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Hougang, Singapore.
#15
There are also different kinds of USM. The 50/1.4 drew the short straw and landed up with the noisiest one... it's not much quieter than the 1.8. In fact it's one of the very few (clearly) audible USM motors.
50mm F1.4 is using a micro USM and not a full Ring USM... so that affect it focusing speed and sound.....
 

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