They don't make lenses like they used to.

Discussion in 'Beyond the Basics' started by Garbz, Nov 26, 2006.

  1. Garbz

    Garbz No longer a newbie, moving up!

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    Last week I picked up the lense for my D200 finally. It's the Nikkor AF-S 18-70mm f3.5-4.5 G DX ED. Very nice lens and I'm very happy with it, but I did notice one thing. The aperature blades do not close in the exact centre of the lens, and the shape they make is a bit oval. It does take fantastic pictures, but I expected more since my 30 year old Nikkor AI 50mm f1.8 is just perfect, though admittedly the new lens is sharper.

    I guess just like modern vinyl pressings, some people just forgot what the word centre means, or is there a reason for this?
     
  2. Flash Harry

    Flash Harry TPF Noob!

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    I have the same lens, its very sharp too, I havent noticed what you describe but as far as I'me concerned if it produces the goods then its a good lens.
     
  3. Garbz

    Garbz No longer a newbie, moving up!

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    I may just take it back just as the warrenty period expires :)
     
  4. Don Simon

    Don Simon TPF Noob!

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    If you think there might be anything at all wrong with it in any way, why not just take it back now? If bought from a shop (as opposed to online) they should be willing to exchange it right there in-store so you won't even have to wait for a replacement.
     
  5. mysteryscribe

    mysteryscribe TPF Noob!

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    unless of course that is the design of the aperture. Nobody wrote in stone that the apurture has to be dead centered. I have no idea since two of you have the same thing and they seem to be quality lenses and it doesn't seem to be a problem i would make sure it is a fault before I went to the trouble.

    By the way modern lenses are a hundred times better than ancient in their detail but they also very hard looking. Just a useless fact.
     
  6. Garbz

    Garbz No longer a newbie, moving up!

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    Few reasons. The shop is on the southside so it's a 3 hour roundtrip. I am leavng the country on Friday. Also Nikon is having such huge distribution problems in Australia that it took the shop 3 months to get my lens in the first place, and they have a backorder to fill, chances of having the lens in the shop are minimal.
     
  7. JIP

    JIP No longer a newbie, moving up!

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    They do make them the way they used to you just have to pay more for them.
     
  8. xfloggingkylex

    xfloggingkylex TPF Noob!

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    could the slight oval shape be a design to help with the wide angles in some way? just a thought. But really if you think theres a problem bring it to the store, take a look at another lens and see if it is the same.
     
  9. Flash Harry

    Flash Harry TPF Noob!

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    Just had a look at mine, as it closes down its actually octagonal and fully open it does look slightly oval rather than round so I wouldn't worry about it as it must be the design, as long as the results are ok/good its no problem.
     
  10. Garbz

    Garbz No longer a newbie, moving up!

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    Hmmm I did notice where it does cause a problem. Taking shots with some bokeh gives a very odd shape of one of the shutter blades. I may call tomorrow and see about getting it looked at. Hasn't affected the sharpness though.
     
  11. Garbz

    Garbz No longer a newbie, moving up!

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    http://s12.photobucket.com/albums/a241/Garbz01/lense test/?sc=1&addtype=local

    Took some example shots above. All of the above are focused on the glass, (cropped not resized), and the glass was 0.4m from the lens, and the led on my hifi was about 3m away. You can see the bokeh screw up at f7.1 the shape starts getting rather irregular. I also photographed a picture of the lens at f 6.3 or f7.1 i can't remember.

    My question to you is, is this normal? Would you send this back if this were your lens?
     

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