coatings on Goerz RD Artar lenses

[nick_rowan]

I recently purchased two Goerz Red Dot Artar lenses--8.25" and 10.75" in barrel, both manufactured approximately 1968 - 1973. The coating on the 10.75" (the slightly higher serial # of the two) is all one color, purple, while the coating on the 8.25" reflects two colors: primarily a "robin's egg" light blue, as well as a secondary, less obvious light purple tone. I had thought that all Goerz RD Artar lenses, at least from the early 1960's or so onward were coated PURPLE only--is this not true? Does anyone own a Goerz RD Artar with a light blue coating like mine, or is anyone aware of such a coating being applied to this lens? Or did the coatings differ by focal length? And did Goerz change its coatings on this lens between say 1967 and 1973? Need I be concerned?

 

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Nick Rowan

[pete_andrews6]

Could be that it suffered some coating damage and was sent back for

re-polishing and re-coating, or maybe it was bought uncoated, and was

coated at a later date. Could be any number of explanations.

<br>Remember, these were sold as process lenses for reprographic use,

and as such were expensive items. Re-coating such a lens would have

been an economical proposition at one time.

[dmin-99]

Wasn't Schneider producing the Artar around 1973? Maybe the lens was

produced by Schneider (it isn't unusual for a company to continue

using the absorbed company's name for awhile on in-production

products), from what I understand they multicoated the Artar at some

point in time.

[doug_paramore2]

Nick: How do the negs or transparencies look? They should be good

regardless of coating color.

 

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Doug.

[nick_rowan]

Doug,

I haven't shot any pictures with the 10.75" lens, the one with the

all-purple coating, yet--but I have taken some with the 8.25" and they

look pretty good. But since I haven't used the 10.75" (I can't until

I have it mounted to a lensboard and shutter) and have never shot with

other Artars from this time period, I don't know what results--in

terms of contrast, most importantly in this case--to expect as

"standard". I do see a pretty noticeable difference in contrast

between the Artar 8.25" and a Rodenstock Sironar N 210mm (circa 1984)

I have--even after attempting to make up for it in film (bw)

development time and printing--but that's probably to be

expected...although a professional camera seller recently told me that

it CAN be compensated for in the processing, and hence that the factor

of a lens' coating or absence thereof does not figure in the shooting

of black-and-white film...I don't think I agree with that

statement...but I'm probably straying from my original question now...

 

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Wayne,

The later serial # lens was the one with the characteristic Goerz all-

purple coating; the earlier one is the one with the potentially

"abberant" coating--personally I doubt that Schneider would have been

applying its own, differing type of coating to a Goerz lens with a

serial number as early as the one I own, but I could be wrong.

 

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Pete,

The lens and lens coating looks too good for it to look like it

experienced any coating damage earlier on or any additional coating

after the lens was sold--but maybe the post-manufacturing coating of a

lens is so good by certain technicians that it can appear

indistinguishable from the manufacturer's own standard coating.

 

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I wasn't aware that Goerz Artar lenses from this vintage--late 1960's-

-were ever sold as uncoated.

 

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--Nick Rowan

[pat_raymore]

This is a issue I have addressed in the several times in the with

Schneider. Each time I have asked I get the same answer, Schneider's

Artars were never multi-coated. Schneider has several brochures that

list them as multi-coated but apparent the brochure where in error.

 

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My last letter from Schneider reads "Mr. Raymore,

 

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Apo-Artars were never multi coated, only single coated.

 

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Regards,

 

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>Are all the late Schneider Apo Artars in black copal shutters

multicoated?

>particular the 240mm f9 Schneider Apo Artar in all black copal

shutters.

 

<p>

 

Michael Klayman

Technical Specialist

Schneider Optics, Inc.

michael@schneideroptics.com"

 

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I have taken Schneider at their word until proven otherwise.