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Re: [OM] 35mm lens?

Subject: Re: [OM] 35mm lens?
From: Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>
Date: Mon, 10 Aug 2009 06:28:43 -0400
But does that comparison of MC vs non-MC work between lenses of 
different focal length?  Few of us have two 24/2.8s.  :-)

Chuck Norcutt


Moose wrote:
> Chuck Norcutt wrote:
>> Yes, at least in my case, looking for green reflections as indicative of 
>> multicoating.  As I recall, this was judged by some to be unreliable. But, 
>> for my own experience with my own Zuikos, I've never seen an x.Zuiko that 
>> reflects anything green (blues, reds and yellows only) and any lens I have 
>> that says "MC" or has a serial number newer than the "MC" marking period all 
>> reflect green.  But I have multicoated Kirons that don't reflect green.
>>   
> 
> I wasn't here for that project. Having read some about it, I was 
> surprised when I sat down to peer deeply into two 24/2.8 lenses, one SC, 
> one MC. Yes indeed, there were different colors, but the most striking 
> thing was how much dimmer the MC reflections were. That's the point, of 
> course, but it interested me how immediately obvious it was which lens 
> was MC without bothering to check individual reflection colors.
> 
>> I suspect great caution is required here since it was reported back then 
>> that Olympus first started multicoating selected elements long before all 
>> elements were multicoated and supposedly before "MC" became an important 
>> marketing factor and placed prominently on the lens.  It is probably much 
>> more important to multicoat certain interior elements to control interior 
>> reflections than it is to multicoat the front side of the front element 
>> which would only make a miniscule improvement in light transmission.
>>   
> 
> Yes, I think it's clear that there was a continuous development of MC 
> technology during that time.
> 
> Moose
>> Chuck Norcutt
>>
>>
>> Moose wrote:
>>
>>   
>>>>   
>>>>       
>>> If I recall correctly, those were the days of peering deep into the lens 
>>> looking at reflection colors. Wasn't the "MC" column to be a judgment 
>>> based on observation of the coating themselves? Others, and I to a 
>>> limited extent, have noticed that the coatings changed character with 
>>> later production within both SC & MC. This may have been a late version 
>>> of mostly single coating with a different formula and/or a multiple 
>>> coating or two that fooled the eye.
>>>     
> 
-- 
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