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Questions about my new used 24-70mm f2.8

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wint

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In bought a 24-70mm supposedly in new condition. But I found two issues.

1) There are marks around the rear glass as you can see in the photo. How could he have done these marks? Can it harm the image?

2) The zoom rubber ring is loosening as I show in another photo. Is it normal?




2dbbceae18bf484f857fcef22f6a1b93.jpg

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Looks like damaged goods. I don't know if that will affect the IQ so shoot some test shots to find out. I hope you're aware that the 24-70 Nikkor had a light leak and was recalled a few years back. Yours looks old enough to have possibly suffered from this slight flaw. Perhaps some of that damage you see was due to an unauthorized or DIY dis-assembly in an attempt at fixing it.
 
I bought my 24-70 2.8 new, just looked at it and do not see the same thing around the lens.
 
Are you referring to the light area around the outer circumference of the rear element, or something else? If it is the light area around the circumference you could darken it with a generic black Sharpie pen. I've seen some where it looks more like paint on the outer edges. I doubt if it will hurt your images either way.

The rubber always seems to loosen in time and some think hand creams or similar are responsible for it. I see Nikon put up some of the rubber grips on a newly revamped online store recently. Not all pieces though, and just maybe one out of two for each zoom lens which seems odd since most zooms have two rubber rings. Maybe in time they will do more.

Mack
 
GMack said:
GMack wrote:

Are you referring to the light area around the outer circumference of the rear element, or something else? If it is the light area around the circumference you could darken it with a generic black Sharpie pen. I've seen some where it looks more like paint on the outer edges. I doubt if it will hurt your images either way.

The rubber always seems to loosen in time and some think hand creams or similar are responsible for it. I see Nikon put up some of the rubber grips on a newly revamped online store recently. Not all pieces though, and just maybe one out of two for each zoom lens which seems odd since most zooms have two rubber rings. Maybe in time they will do more.

Mack
Click to expand...

Yes it's the light area around the rear glass circumference. How can I be sure it's not hurting my image in any way?
 
digital ed said:
digital ed wrote:

I bought my 24-70 2.8 new, just looked at it and do not see the same thing around the lens.
Click to expand...
It has been used before and I just bought it from the previous owner in "like new condition"...
 
I just checked my 24-70 and neither of those issues are on mine. The back glass is really disturbing, it looks like a really bad repair!

I would send that one back asap.
 
wint said:
wint wrote:
wint said:
digital ed wrote:

I bought my 24-70 2.8 new, just looked at it and do not see the same thing around the lens.
Click to expand...
It has been used before and I just bought it from the previous owner in "like new condition"...
Click to expand...
HI!

That lens is not in "like new condition".

While the 24-70 is a superb mid range zoom, and most folks don't have any problems with theirs, it has had more of its share of problems:

-Fragile mounting ring (earliest models), had screws pull out with minimal jostling.

-Loose rubber

-Light leaks

-The infamous "stiff zoom ring" ($550 repair).

Unless you got this for a bargain price and don't mind taking a risk, I'd return it.

It would (maybe) meet KEH's description of a "Bargain" quality lens. They'd buy such a lens for $917.

RB
 
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After a few years the rubber Zoom ring can loosen some. I dont think you have a new lens
 
RBFresno said:
RBFresno wrote:
RBFresno said:
wint wrote:
RBFresno said:
digital ed wrote:

I bought my 24-70 2.8 new, just looked at it and do not see the same thing around the lens.
Click to expand...
It has been used before and I just bought it from the previous owner in "like new condition"...
Click to expand...
HI!

That lens is not in "like new condition".

While the 24-70 is a superb mid range zoom, and most folks don't have any problems with theirs, it has had more of its share of problems:

-Fragile mounting ring (earliest models), had screws pull out with minimal jostling.

-Loose rubber

-Light leaks

-The infamous "stiff zoom ring" ($550 repair).

Unless you got this for a bargain price and don't mind taking a risk, I'd return it.

It would (maybe) meet KEH's description of a "Bargain" quality lens. They'd buy such a lens for $917.

RB
Click to expand...
 
wint said:
wint wrote:
wint said:
RBFresno wrote:
wint said:
wint wrote:
wint said:
digital ed wrote:

I bought my 24-70 2.8 new, just looked at it and do not see the same thing around the lens.
Click to expand...
It has been used before and I just bought it from the previous owner in "like new condition"...
Click to expand...
HI!

That lens is not in "like new condition".

While the 24-70 is a superb mid range zoom, and most folks don't have any problems with theirs, it has had more of its share of problems:

-Fragile mounting ring (earliest models), had screws pull out with minimal jostling.

-Loose rubber

-Light leaks

-The infamous "stiff zoom ring" ($550 repair).

Unless you got this for a bargain price and don't mind taking a risk, I'd return it.

It would (maybe) meet KEH's description of a "Bargain" quality lens. They'd buy such a lens for $917.

RB
Click to expand...
Click to expand...
 
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While everyone else seems to think it's some major lens fault, it looks ot me like the previous owner just did a crappy job of cleaning the rear element. I've seem similar marks around the perimeter of filters from my own crappy cleaning jobs. It's obviously difficult to get at the edges of the glass when the rear element is in the position it's in so perhaps changing the focus of the lens to move it in or out a bit might help.

The loose zoom ring is a common occurence on Nikon zooms. The last one I replaced cost me $14 with shipping.
 
joejack951 said:
joejack951 wrote:

While everyone else seems to think it's some major lens fault, it looks ot me like the previous owner just did a crappy job of cleaning the rear element. I've seem similar marks around the perimeter of filters from my own crappy cleaning jobs. It's obviously difficult to get at the edges of the glass when the rear element is in the position it's in so perhaps changing the focus of the lens to move it in or out a bit might help.

The loose zoom ring is a common occurence on Nikon zooms. The last one I replaced cost me $14 with shipping.
Click to expand...
I would be v-nervous about the previous owner's care of the lens if the rear element is that messed up. I have been shooting DSLR/SLR my whole life and I have never had to do more that as quick blow off of a rear element! What would have caused that mess?
 
It could be dried cleaning solution or something else! Its just difficult to tell from the photo. Have you tried to reclean the rear glass, that should answer the question.While it makes sense to look at used gear on expensive lenses, there have been enough issues with the 24-70 f2.8 that I personally would not purchase an used one from a private party I did not know well.
 
Member said:
MikeyLikesNikon wrote:
Member said:
joejack951 wrote:

While everyone else seems to think it's some major lens fault, it looks ot me like the previous owner just did a crappy job of cleaning the rear element. I've seem similar marks around the perimeter of filters from my own crappy cleaning jobs. It's obviously difficult to get at the edges of the glass when the rear element is in the position it's in so perhaps changing the focus of the lens to move it in or out a bit might help.

The loose zoom ring is a common occurence on Nikon zooms. The last one I replaced cost me $14 with shipping.
Click to expand...
I would be v-nervous about the previous owner's care of the lens if the rear element is that messed up. I have been shooting DSLR/SLR my whole life and I have never had to do more that as quick blow off of a rear element! What would have caused that mess?
Click to expand...
As noted already, dried, dirty cleaning solution looks like that. Perhaps the guy got a finger print on the rear element somehow and wanted to clean it up before the sale (of course, he could have done a better job at that). I honestly think that glass will look like new with a proper cleaning though.
 
Is the edge of the glass rough? It looks like it might have been used with a teleconverter and the rear element contacted the glass in the teleconverter.
 
pavi1 said:
pavi1 wrote:

Is the edge of the glass rough? It looks like it might have been used with a teleconverter and the rear element contacted the glass in the teleconverter.
Click to expand...
 
Which tests can I do to make sure these marks in the edge of the rear glass aren't hurting my images?
 
wint said:
wint wrote:

Which tests can I do to make sure these marks in the edge of the rear glass aren't hurting my images?
Click to expand...
Not sure...




But, I suspect that since they are at the extreme edges, probably no effect. It just makes me wonder about what else might be going on with the lens (though I'm probably more paranoid than most!).;







RB
 
wint said:
wint wrote:

Which tests can I do to make sure these marks in the edge of the rear glass aren't hurting my images?
Click to expand...
How about trying to clean them off first? I'm 99% certain they'll come off after a good wet clean with a clean cloth.
 
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