lens scratch

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thenamesdaryl

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Name
Daryl
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Hi all
just got in to find my Christmas present has arrived, a sigma 10 - 20 mm f4 - 5.6. upon close inspection to the optics i found a small scratch on the front lens, it is very hard to see and im using an LED torch to find it so very fine, cannot see it through view finder, but im concerned it may show up in my photos :( anyone got any advice, any tests i can do to make it appear in an image or to see if it would how up? i have tried to take a snap of it, but cannot
thanks, Daryl
 
Daryl if it's a brand new lens then contact the supplier and get it canged anyway. It will bug the heck out of you if you don't.

As for the scratch unless it's bad which by the sounds of it, it isn't it wont show in your pictures.

If I'd paid full price top wack then I'd be miffed, if second hand then forget it and get on with using it. :D
 
well i got it second hand, and for only £240, which im well impressed with. i want to see if i can force it to appear, and if that fails, ill be happy
Daryl
 
Honestly, scratches, even on the front element, are so close to the film (sensor) plane that they won't register in shot. I've seen pictures of lenses that looked like they'd been in a fight with Zorro that produced 100 per cent fine images. My Tamron 17-50 isn't exactly a spring chicken and sports a few scratches and it still gets me covers aplenty with no quibbles.

What was the description of the lens and were any scratches mentioned? On a used lens there will always be acceptable levels of superficial damage that separates used from new. :thumbs:
 
I would say try taking pictures of a few plain backgrounds, of different colours/shades, and see if you can see anything when viewing the pictures on your PC, if you can't, I wouldn't have thought you could see them with anything else:thumbs:
 
ah this is reassuring specialman, well it was on ebay for £300 and didn't sell, so we did some haggling :) was advertised as, and i quote ' it is in very good condition with no marks'. don't know weather to pursue the guy, or accept i got it at a decent price and leave it be, after all, it is damn hard to see!
 
You will not be able to see it in the photos, no matter what the settings.
This is an interesting read.
http://lensblogger.typepad.com/lensblogger/2008/11/front-element-scratches.html

As you can see, scratches and lots of dust in a lens may cause loss of contrast, loss of light gathering, and lens flare, but even so, will not be visible on the image. (In fact, our guess is most of the lost sharpness is because the optical element shifted when it broke, rather than from the cracks themselves.) Dust on the sensor may show up on an image, but dust or scratches within the lens really aren't something to worry about.
Click to expand...
 
your problem is if you ever want to sell it on you will have to declare the scratch.. if your thinking of keeping it then I really wouldnt worry as the scratch wont show or effect your pics...
 
oke doke. yeah i understand resale value will decrease, but i don't want to send it back as it was a good price. wow, that article is amazing, i can understand how it works, i think i shall live with it :)
thanks all for your replies, Daryl
 
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