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Leica 10x50BA -Lens Blemish

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Old Monday 23rd July 2018, 16:02   #26
Merlin
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Thank you all,

There is some good, sound advice there.

best regards

Merlin
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Old Monday 23rd July 2018, 16:35   #27
dries1
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Pileatus,

Well then it appears that Leica USA is more efficient than Leica Europe? I live in the US so that is encouraging.

And Bob, I never said Leica was cheaply made, I own four of their glass, use them often, great views and I respect the workmanship, I was talking about another manufacturer not Leica.

Andy W.

Last edited by dries1 : Monday 23rd July 2018 at 16:42.
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Old Monday 23rd July 2018, 21:59   #28
ceasar
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Pileatus,

Well then it appears that Leica USA is more efficient than Leica Europe? I live in the US so that is encouraging.

And Bob, I never said Leica was cheaply made, I own four of their glass, use them often, great views and I respect the workmanship, I was talking about another manufacturer not Leica.

Andy W.
Sorry for the confusion Andy. I misunderstood your comment.

Bob
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Old Tuesday 24th July 2018, 01:20   #29
dries1
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Bob,

No worries. Enjoy the rain, we are being pounded in Se Pa.

Andy W.
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Old Tuesday 24th July 2018, 15:03   #30
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No rain here for about 6 weeks.
Beginning to look like the Sahara. Expecting to see camels, although the two clip clops I heard this morning were probably police horses.

If the Leica repair of the 10x50BA is less than 250 in Portugal, it must be worth having it done.
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Old Tuesday 24th July 2018, 15:11   #31
dries1
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Binastro,

No astro all week, and too wet to go out. This has to get better soon.
How is the viewing of birds/stars over there.

Yes that would be a very fair price, that is a nice glass and well worth it.


Andy W.
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Old Tuesday 24th July 2018, 15:34   #32
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Hi Andy,
Last night the transparency was exceptional, but I can't see Mars because of buildings. It is too low.
32C, 90F, yesterday and around that every day for a long time. No hose pipe ban yet. not sure if the moorland is still burning.

I use the Leica 8x32BA for noctilucent cloud observation. season ends about August 4th.

Apparently in Finland they have very good forest management with roads through the forest for quick fire engine access and also large breaks to stop flames jumping.
Each village also has volunteer firefighters.
It seems Sweden has not planned so well and about 80 fires are burning, with help from Poland, Italy, Norway etc.

The trees outside in the street here are distressed with the bark falling off. I have not seen this before.
I suppose the birds are struggling to find water.
I suppose there are some streams and reservoirs.
The foxes look O.K.

Last edited by Binastro : Tuesday 24th July 2018 at 15:37.
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Old Wednesday 25th July 2018, 00:32   #33
ceasar
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Bob,

No worries. Enjoy the rain, we are being pounded in Se Pa.

Andy W.
Heavy squalls are coming through here every couple of hours. Creeks are high and the Susquehanna is rising but no flooding is expected here. Central PA around the Harrisburg area got more rain.

Bob
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Old Wednesday 25th July 2018, 04:25   #34
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Binastro,

The exact opposite here, had to re-attach a gutter, too much sheet-flow off the roof.

Bob,

I have not seen clouds this low and fast moving for this duration, in a long while, almost directly North.
The winds were gusting up to 35 MPH today, It must be different up where you are, I am only at around 260 feet AMSL.

Andy W.
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Old Saturday 28th July 2018, 01:28   #35
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Hi,

Leica does not melt optical glass - neither does Zeiss btw, although Zeiss belongs to the Carl Zeiss Foundation which also owns Schott - and those guys actually make optical glass.

Regarding the blemished objective - the explanation seems fairly odd - normally the way to remove MgF based AR coatings involves a lot of polishing - preferably without altering the figure too much.

On CN some scientist needed to modify a Celestron Schmidt-Cassegrain for far IR and the coatings on the corrector plate were opaque for the the desired wavelengths.
He then tried quite some nasty chemicals (he had a lab at hand plus some staff) - iirc the coatings didn't care and he got an uncoated corrector made.

On second thoughts... wasn't there some series of early Leica Televids which didn't like sea water too much and got opaque? Maybe the 10x50 has the same coatings?

Joachim
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Old Wednesday 17th October 2018, 19:16   #36
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Hello Merlin,

I also own the Leica 10 x 50 BA Trinovid binoculars and I really love them. (Owned since mid 1990's.) So I'm curious how this all turned out for you. Did you send them back to Leica for repair or not?

-Bill
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