Luminous Landscape Forum
Equipment & Techniques => Cameras, Lenses and Shooting gear => Topic started by: Cottonsworth on November 26, 2006, 04:55:42 pm
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I brought a Canon EF 20-35mm f/3.5-4.5 USM lens from a private seller. The main body on the lenses says 28mm but the zoom ring says 20-35mm. The lenses is obviously a 20-35mm since I can zoom. Does anyone know why there would be a mismark of 28mm on the body? Could this be a counterfeit product or is it just a printing error on Canon's part? Thanks.
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I brought a Canon EF 20-35mm f/3.5-4.5 USM lens from a private seller. The main body on the lenses says 28mm but the zoom ring says 20-35mm. The lenses is obviously a 20-35mm since I can zoom. Does anyone know why there would be a mismark of 28mm on the body? Could this be a counterfeit product or is it just a printing error on Canon's part? Thanks.
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could you post a pic of it
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Here are some pictures. As you can see, the body clearly says 28mm but you can see where you can adjust from 20-35mm. Note that on the side picture, it says Canon Zoom Lens EF 20-30mm. Thanks.
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Here are some pictures. As you can see, the body clearly says 28mm but you can see where you can adjust from 20-35mm. Note that on the side picture, it says Canon Zoom Lens EF 20-30mm. Thanks.
Unless there was one or several lenses with a misprint by Canon, this is a fake or a Frankenstein monster from parts of the 28mm f/1.8 and 20-35mm.
Here's Canon's data on their lenses, first two are for the 20-35mm, the last two for the 28mm f/1.8:
http://www.usa.canon.com/consumer/controll...48&modelid=7330 (http://www.usa.canon.com/consumer/controller?act=ModelDetailAct&fcategoryid=148&modelid=7330)
http://www.canon.com/camera-museum/camera/..._35~45_usm.html (http://www.canon.com/camera-museum/camera/lens/ef/data/ef_20~35_35~45_usm.html)
http://www.usa.canon.com/consumer/controll...51&modelid=7302 (http://www.usa.canon.com/consumer/controller?act=ModelDetailAct&fcategoryid=151&modelid=7302)
http://www.canon.com/camera-museum/camera/..._28_18_usm.html (http://www.canon.com/camera-museum/camera/lens/ef/data/ef_28_18_usm.html)
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Thanks for the reply Jani. After looking at the links you posted, it seems unlikely that it is a misprint since the bottom half of my lenses looks exactly like the 28mm lenses. If anyone would like to chime in, I would greatly appreciate it.
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Thanks for the reply Jani. After looking at the links you posted, it seems unlikely that it is a misprint since the bottom half of my lenses looks exactly like the 28mm lenses. If anyone would like to chime in, I would greatly appreciate it.
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Could you please ask your private seller whether he could do the same trick between a Nikon D2x body and a Canon 5D sensor?
Thanks,
Cheers,
Bernard
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My guess would be that the lens was broken at one time, and when it was repaired the exterior housing of a 28mm f/1.8 was used. If you look at the window for the focus marking, it has a depth of field scale. The 20-35mm does not have this.
If the parts are interchangeable, which it appears that they are, I'd say that there really isn't a problem with keeping the lens if you're happy with it.
This however does affect resale value since the seller should be disclosing that it was repaired. If you got a good price for it I'd say don't worry. If you paid top dollar then I might send an email to the seller asking if he'll accept a return or give a partial refund.
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My guess would be that the lens was broken at one time, and when it was repaired the exterior housing of a 28mm f/1.8 was used. If you look at the window for the focus marking, it has a depth of field scale. The 20-35mm does not have this.
If the parts are interchangeable, which it appears that they are, I'd say that there really isn't a problem with keeping the lens if you're happy with it.
This however does affect resale value since the seller should be disclosing that it was repaired. If you got a good price for it I'd say don't worry. If you paid top dollar then I might send an email to the seller asking if he'll accept a return or give a partial refund.
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If that was the case, would that mean that the aperture for this lens is now f/1.8 instead of f/3.5-4.5? Thank you.
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If that was the case, would that mean that the aperture for this lens is now f/1.8 instead of f/3.5-4.5? Thank you.
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That would be nice, but I doubt that's how it works. The only interchangeable part is probably the plastic shell that goes around the internal components. It has to be entirely a cosmetic modification, otherwise the lens wouldn't work.
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Thanks for the response Sheldon.
I called Canon today. They advised me that it is a Frankenstein repair. Right now, I am hoping that the seller I brought it from would be willing to take it back. Thanks for all the responses!
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That would be nice, but I doubt that's how it works. The only interchangeable part is probably the plastic shell that goes around the internal components. It has to be entirely a cosmetic modification, otherwise the lens wouldn't work.
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It wouldn't work. That would require the glass itself to 2.5 times as wide across, not something a simple kludge job could job.
If it did work, it'd be the only zoom with aperture <f/1.8 I'd heard of ever. Not likely to happen with a repair job.
-Lars