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Good copy/bad copy - what do people mean?

  • 10-02-2009 12:00pm
    #1
    workaccount
    Closed Accounts Posts: 2,460 ✭✭✭


    I've been researching lenses recently and have come across statements more than once such as "I got a bad copy" or "I changed it and the new one was better".

    I'm not sure what they mean though - Is it just that some lenses pass through quality control when they shouldn't have or what? Where does that leave a beginner buying a used lens?

    Thanks.


Comments

  • #2
    Paulw
    Registered Users, Registered Users 2 Posts: 13,381 ✭✭✭✭Paulw


    Like with any mass produced items, sometimes quality can slip from time to time. When you're talking about high quality optics, this can be harder to control.

    The only thing you have, is a warranty, and if the lens isn't of the right quality, you're entitled to a repair/replacement of a faulty lens.


  • #3
    rymus
    Registered Users, Registered Users 2 Posts: 8,819 ✭✭✭rymus


    people that generally look at images at 100% on their monitors generally find that they have 'bad copies' of lenses. It is the opinion of these folks that their lens did indeed miss some vital quality control check or that it was passed when it shouldn't have.

    These people are also often to be seen wearing tinfoil hats.

    To a beginner buying a used lens, they'll all be good copies. The only thing the majority of beginners would notice (imo) is if the focusing motor in a lens was hanging out the side of it or if photos were noticably soft (like someone passed over the lens with a stick of lard).


  • #4
    Nisio
    Registered Users, Registered Users 2 Posts: 630 ✭✭✭Nisio


    Of course all right thinking people know that good copies have even serial numbers and bad copies have odd serial numbers.


  • #5
    workaccount
    Closed Accounts Posts: 2,460 ✭✭✭workaccount


    Ok thanks. Can anyone tell me what the difference is between these three lenses? There all the Sigma 10 20 but there all different prices. Why does it not just have an EF Canon?

    http://www.pixmania.co.uk/uk/uk/2304989/art/sigma/10-20mm-f4-5-6-dc-ex-lens.html
    http://www.pixmania.co.uk/uk/uk/766709/art/sigma/10-20-mm-f4-5-6-dc-ex-len.html
    http://www.pixmania.co.uk/uk/uk/984165/art/sigma/ex-wide-angle-zoom-lens-1.html


  • #6
    Nisio
    Registered Users, Registered Users 2 Posts: 630 ✭✭✭Nisio


    Signma are a third party lens manufacturer, they make lenses for canon nikon sony etc, same lens with a different mounting


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  • #7
    workaccount
    Closed Accounts Posts: 2,460 ✭✭✭workaccount


    Yeah it's just two of them say Digital SLR as there fitting and then theres a massive difference in price - they seem to be the same though.

    Can't believe pixmania - I just checked the price on the Irish site and it's 550 euro whereas on the UK one is 309GBP!


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