Nikkor H vs. Nikkor H*C 50/2 LTM

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I was wondering if anyone could tell me the difference between these lenses. Except for designation (a red C) and fontface (one slightly larger), the lenses look identical.
 
I have a feeling the "C" indicated lens coating. However I don't know the difference or amount if any between the H and HC lenses.

Didn't Nikon eventually stop using a "C" altogether in the late 70's since all lenses produced by then were coated.
 
ItsReallyDarren said:
Found something on Pnet. It covers SLR lenses but I think the same applies to RF lenses.

http://photo.net/nikon-camera-forum/00HAUX
Click to expand...

No, it doesn't apply to RF lenses. Nikon has used the ".c" twice, though each was to designate different aspects of the lens coatings.

Nikon's F-mount lenses, with the exception of some very special lenses, were all coated from day one (1959). Many years later they began to use multi-layer coatings. As technology improved and competitors (primarily Pentax) began to brag about their multi-coating Nikon began multicoating all of the glass-to-air surfaces in all of their regular production F-mount lenses with a minimum of 7 layers (or was it 8?). When they did this they began to add the ".c" to the end of the lens designation, just after the letter code denoting the number of elements. They stopped the ".c" marking when they also stopped the letter code for the number of elements; at that time multicoating was the industry norm.

Much earlier, when simple single layer coating was leading edge tech, Nikon used the same ".c" designation to mark lenses that were coated to distinguish them from earlier uncoated lenses. Whether they every phased out this marking in their later RF lenses I don't know. It had become passe by the 1959 introduction of the F and wasn't used on the F-mount lenses as all were coated, as stated above.
 
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