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Advice needed: tiny spots on brand new lens
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PostPosted: Sat Jan 21, 2012 1:53 pm    Post subject: Advice needed: tiny spots on brand new lens Reply with quote
Today I had a chance (at last!) to go out and shoot in daylight.

I noticed my brand new Zeiss C Biogon 21mm has two tiny spots near the edge of the front element.
It seems there is an issue with its coating.

Getting back home, I could not see these spots indoors, even with a lot of artificial light.
One has to look at a certain angle and with lots of daylight to see these spots.

Apparently, they do not affect image quality.

But what if it gets worse in the future?
I guess Zeiss will be more willing to accept the fact 15 days after the purchase date, than a year later.
Is the peeling of the coating covered by the guarantee?

What would you do?


PostPosted: Sat Jan 21, 2012 3:35 pm    Post subject: Re: Advice needed: tiny spots on brand new lens Reply with quote
Nikos wrote:
Today I had a chance (at last!) to go out and shoot in daylight.

I noticed my brand new Zeiss C Biogon 21mm has two tiny spots near the edge of the front element.
It seems there is an issue with its coating.

Getting back home, I could not see these spots indoors, even with a lot of artificial light.
One has to look at a certain angle and with lots of daylight to see these spots.

Apparently, they do not affect image quality.

But what if it gets worse in the future?
I guess Zeiss will be more willing to accept the fact 15 days after the purchase date, than a year later.
Is the peeling of the coating covered by the guarantee?

What would you do?


Not sure what it is, but obviously take it back if it trouble you, then get a Leica lens next time.


PostPosted: Sat Jan 21, 2012 4:16 pm    Post subject: Reply with quote
Getting tired of only hearing you yak about Leica.


PostPosted: Sat Jan 21, 2012 5:06 pm    Post subject: Reply with quote
+1

Now for something more ontopic than trying to convert people when they seek advice:
Taking the chance to be Captain Obvious here, I would email them to ask about it or call the customer service, the only way to make sure I guess.
I don't have the budget to have any experience with their waranty policy Wink , though I would expect that kind of thing to be covered for lenses in this priceclass.


PostPosted: Sat Jan 21, 2012 5:59 pm    Post subject: Re: Advice needed: tiny spots on brand new lens Reply with quote
FluffPuppy wrote:

Not sure what it is, but obviously take it back if it trouble you, then get a Leica lens next time.

I would get a Leica M9 if the sensor performance was not disappointing Razz


PostPosted: Sat Jan 21, 2012 6:06 pm    Post subject: Reply with quote
Bullseye Nikos.


PostPosted: Sat Jan 21, 2012 6:22 pm    Post subject: Re: Advice needed: tiny spots on brand new lens Reply with quote
Nikos wrote:
FluffPuppy wrote:

Not sure what it is, but obviously take it back if it trouble you, then get a Leica lens next time.

I would get a Leica M9 if the sensor performance was not disappointing Razz


Use film, it's better in every way.


PostPosted: Sat Jan 21, 2012 6:25 pm    Post subject: Reply with quote
Try to light throw with led torch and examine with magnifier, you must see it well in indoor too. In case of you I take it back to shop and ask replace or discount. If you ever want to sell it , people will buy it for less due spots no matter it is not effect IQ , it is effect current value just same like sign of trace on tube.


PostPosted: Sat Jan 21, 2012 7:25 pm    Post subject: Reply with quote
If it is on the surface try a gentle cleaning; if within, return it.


PostPosted: Sat Jan 21, 2012 7:29 pm    Post subject: Reply with quote
Yes resale value is important.
In your experience Attila, do you think the spots will start to multiply with time?

I will drop an email to Zeiss, since I bought the lens directly from them online.

FluffPuppy wrote:
If it is on the surface try a gentle cleaning; if within, return it.

I tried a gentle cleaning, of course. No luck.


PostPosted: Sat Jan 21, 2012 7:59 pm    Post subject: Reply with quote
Why not just return it for another one. That way your mind will be at ease.


PostPosted: Sat Jan 21, 2012 9:16 pm    Post subject: Reply with quote
Kram wrote:
Why not just return it for another one. That way your mind will be at ease.


+1

depend how you store it and what kind of spot, even if fungus start due lens was stored in dark and humid place if you store it properly it will not change.


PostPosted: Sat Jan 21, 2012 9:32 pm    Post subject: Re: Advice needed: tiny spots on brand new lens Reply with quote
Nikos wrote:
Today I had a chance (at last!) to go out and shoot in daylight.

I noticed my brand new Zeiss C Biogon 21mm has two tiny spots near the edge of the front element.
It seems there is an issue with its coating.

Getting back home, I could not see these spots indoors, even with a lot of artificial light.
One has to look at a certain angle and with lots of daylight to see these spots.

Apparently, they do not affect image quality.

But what if it gets worse in the future?
I guess Zeiss will be more willing to accept the fact 15 days after the purchase date, than a year later.
Is the peeling of the coating covered by the guarantee?

What would you do?


Where exactly is it?


PostPosted: Sat Jan 21, 2012 10:56 pm    Post subject: Reply with quote
You could scratch a lens with a nail and it would not affect image quality at all.

Unless you think the "spots" will damage the resale value of the lens, just forget it. Personally, I never go crazy looking through lenses with flashlights for dust, looking for spots with a microscope, etc.

If you don't have peace of mind about it, just return it for a new one, and be done with it.

PS: Your lens does not have an "issue", it has a "problem". The word "issue" is drastically misused in modern times.


PostPosted: Sat Jan 21, 2012 11:07 pm    Post subject: Reply with quote
Nothing else to add; only questions to satisfy curiosity. Smile

How big is tiny? Circular? Random or regular distribution? Colored? Surely they can be seen using a strong torch light -- examine using magnifying glass to see coating defect, damage, or foreign matter.

Image effects can sometimes be seen with sun just out of frame -- position sun at same angle as spots are angled from center of lens when on camera, try to get some flaring...

The other place to look is to pixel peep at highlight bokeh -- near outer ring any spots?

Another option is ask for a discount.
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