Coating Wiped Off - 24mm Elmarit

[pgk]

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5 hours ago, johnloumiles said:

Yeah I use it. Seems a little flare-y, like that chlorine in the eye effect you get with some old Russian lenses. Not terrible but not super sharp like it use to be.

My Elmarit-M bleeds highlights into adjacent shadow areas. Sharp enough but very noticable edge spillover light effects.

Edited June 20, 2021 by pgk

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[250swb]

On 6/19/2021 at 9:41 AM, jaapv said:

If that is the same type of coating, which I doubt. Glass spectacle lens coatings can be removed with Isopropyl Alcohol, which does not damage photographic lens coatings. The coatings on plastic lenses are etched to the surface.

Clearly not all coatings are equal, I have a Nikon coating on my spectacles and IPA does not remove it.

There are some far fetched theories in the DPReview article, like sunscreen has micro particles in it that can act like sandpaper, well if you try fine carborundum paper on a lens coating it is very hard to remove, I've tried it. However there is some traction in the idea that sunscreen, and I'll also add insect repellent, has stuff in it that can soften plastics and paints, so maybe also lens coatings, except it seems my Nikon coated lenses are once again immune.

[jaeger]

On 6/18/2021 at 7:11 PM, johnloumiles said:

 I would use on those lens clothes (usually separate screen and lens but could be a mixup).

Not sure I’d trust myself to redcoat a lens but wonder if Leica can do it.

 

thanks for feedback

Use lens paper + eclipse solution and watch few lens cleaning youtube videos.  Clothes on camera lens is not a good idea.

If you bring (or send) your lens to Wetzlar anything is possible.  Instead of re-coat the glass, If they have the front element in stock it's a 5 minutes job and should not cost you much.  Email them now. 

 

 

[pedaes]

28 minutes ago, jaeger said:

it's a 5 minutes job

Such jobs are not recognised in Wetzlar.😉

[jaapv]

53 minutes ago, 250swb said:

Clearly not all coatings are equal, I have a Nikon coating on my spectacles and IPA does not remove it.

There are some far fetched theories in the DPReview article, like sunscreen has micro particles in it that can act like sandpaper, well if you try fine carborundum paper on a lens coating it is very hard to remove, I've tried it. However there is some traction in the idea that sunscreen, and I'll also add insect repellent, has stuff in it that can soften plastics and paints, so maybe also lens coatings, except it seems my Nikon coated lenses are once again immune.

I've seen WD40 recommended FWIIW.

[AndreasG]

vor 24 Minuten schrieb jaapv:

I've seen WD40 recommended FWIIW

And Hydrofluoric acid as last resort..., solves any lens problem, permanently.

[Wandering Photographer]

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On 6/18/2021 at 10:11 PM, johnloumiles said:

Could be computer screen cleaner as that’s the only cleaner I would use on those lens clothes (usually separate screen and lens but could be a mixup). Possibly windex at some point  if I got lazy with the computer cleaner. It’s really weird since I’ve been a lot more brutal to old, cheap non-leica lenses and have never seen coating come off. Maybe it’s scratches but can’t see having something that gritty hanging on my clothes.

Not sure I’d trust myself to redcoat a lens but wonder if Leica can do it.

 

thanks for feedback

Are you sure the coating came off? It looks like it may just be some contamination that got on your lens cleaning cloth, like sweat and body oils if you kept it in a shirt pocket of handled it a lot. Have you tried using a new lens cloth and optical lens cleaner? That might fix the problem for you. 

[pedaes]

18 minutes ago, Wandering Photographer said:

It looks like it may just be some contamination

See post #11

Edited June 20, 2021 by pedaes

[pgk]

2 hours ago, jaeger said:

If you bring (or send) your lens to Wetzlar anything is possible.  Instead of re-coat the glass, If they have the front element in stock it's a 5 minutes job and should not cost you much.  Email them now. 

Well I was quoted several hundred Euros for the Elmarit-M front element replacement. Perhaps it should not but it probably will cost a lot I would say.

[Alan Friedman]

Modern coatings would be difficult to damage to this extent short of aggressive rubbing. It is possible that the application of the coating was defective. I would purchase some acetone - moisten a folded piece of plain facial tissue (untreated) with it and give a swipe to the affected portion of the lens. If it is a stubborn deposit of schmutz you should see a difference. 

[Gobert]

2 hours ago, pgk said:

Well I was quoted several hundred Euros for the Elmarit-M front element replacement. Perhaps it should not but it probably will cost a lot I would say.

A couple of hundred sounds quite reasonable. I would not doubt for even one minute.

[pgk]

23 minutes ago, Gobert said:

A couple of hundred sounds quite reasonable. I would not doubt for even one minute.

If I remember correctly around €650 was mentioned.

[jaapv]

Not an unexpected sum.

[jdlaing]

Unless the coating was already scratched down to the glass and some chemical got under it you really gotta scrub on a lens this new to get that coating off.

[Michael Geschlecht]

3 hours ago, pgk said:

If I remember correctly around €650 was mentioned.

Hello Paul,

The cost of the glass in the element being replaced, or the manufacturing technology involved, might be parts of the reason for the price. Do you know what type of glass is in that element? Or the shape?

Best Regards,

Michael

[pgk]

8 hours ago, jdlaing said:

Unless the coating was already scratched down to the glass and some chemical got under it you really gotta scrub on a lens this new to get that coating off.

I'd agree fully. I suspect a coating problem when coatings come off as easily.

8 hours ago, Michael Geschlecht said:

Hello Paul,

The cost of the glass in the element being replaced, or the manufacturing technology involved, might be parts of the reason for the price. Do you know what type of glass is in that element? Or the shape?

Best Regards,

Michael

Given that its a 'spare' I'd doubt that the manufacturing cost is the basic controller of the price. Much more likely its based on technician's time for stripping, reassembling and adjusting.

[Michael Geschlecht]

4 hours ago, pgk said:

I'd agree fully. I suspect a coating problem when coatings come off as easily.

Given that its a 'spare' I'd doubt that the manufacturing cost is the basic controller of the price. Much more likely its based on technician's time for stripping, reassembling and adjusting.

Hello Paul,

Labor costs are important. But so are material costs. The cost of some of the glasses used in certain lens elements is significant & would be accounted for in determining the cost of replacement. That is why I am asking.

Part of the cost of a current Leica lens, camera, etc. is the cost of the production of & the availability of a certain percentage of the total production as replacement parts, etc. for some time period into the future. This additional material does not become "give aways" because they are being kept for repairs, etc. in the future. They are part of the cost of doing business.

Best Regards,

Michael

[johnloumiles]

On 6/20/2021 at 3:43 PM, Alan Friedman said:

I would purchase some acetone - moisten a folded piece of plain facial tissue (untreated) with it and give a swipe to the affected portion of the lens. If it is a stubborn deposit of schmutz 

Tried this, it’s definitely not anything on the lens.

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