How to choose the best copy when buying new lens?


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chalib

Senior Member
Oct 4, 2007
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#1
Hi seniors

New to photography. Need advise on how to choose best copy when buying new lens in a shop? Any step or what things we need to check beside the physical condition?

TIA
 

dragos

New Member
Jan 17, 2002
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Apex Circle
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#2
just bought my lens at CP...what i do is, bring along your own cam.

check at the largest aperture...see if it is soft.

do focussing at various pts.

check if serial and warranty tallys.
 

chalib

Senior Member
Oct 4, 2007
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#3
just bought my lens at CP...what i do is, bring along your own cam.

check at the largest aperture...see if it is soft.

do focussing at various pts.

check if serial and warranty tallys.
Thks for advise. 'do focussing at various points' means shooting object with different distance? with one point focus or multi point?

I read abt dust in the lens. How to check this? :confused:
 

noob117

New Member
Oct 16, 2006
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west
#4
i tot most of the time wide open is soft?
how u tell the diff of softness between glass or the fault of the manufacturing process?
 

b-a-k

New Member
Aug 4, 2006
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Ubi
www.flickr.com
#5
ya lor, might as well reject the first lens the shop give you as they will try to sell of 'rejected' goods earlier??
 

noob117

New Member
Oct 16, 2006
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west
#7
erm... when lens are wide open they are not as sharp as liek say F8.
so when it at it max aperture eg. 2.8 the image tents to be soft.

so how to tell apart this softness to softness of lens deflects :dunno:
 

tSkye

New Member
Nov 8, 2005
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Farrer Park
#8
It would be good if you could bring your tripod and notebook computer. Shoot tethered and view it off the screen. A general rough guide would be to compare between two lenses at a time by placing their image shot, side by side.
 

chalib

Senior Member
Oct 4, 2007
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#9
It would be good if you could bring your tripod and notebook computer. Shoot tethered and view it off the screen. A general rough guide would be to compare between two lenses at a time by placing their image shot, side by side.
u mean we ask the shop to show 2 copies in a time and do comparison?

:think:
 

SolBadGuy

Senior Member
Nov 5, 2006
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#10
u mean we ask the shop to show 2 copies in a time and do comparison?

:think:
why not? as the consumer u do have the right to protect ur own interest. go to shops like MS, they will allow u to test till u're satisfied. but have to be reasonable also lah. :)
 

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