DREW WILEY
Member
- Joined
- Jul 14, 2011
- Messages
- 13,825
- Format
- 8x10 Format
There are different legitimate reasons to coat or multicoat. One is to reduce flare. But since certain special types of optical glass have become rare or extinct due to either exorbitant cost or proscribed toxic ingredients, multicoating has become an important method of fine-tuning optical performance. This doesn't mean that single
coated lenses are inferior. I've used single-coated lenses which were better in almost every category than later multicoated equivalents; but they also employed
glass no longer available. So it all depends. Likewise, with reference to "apo". Among German manufacturers, Rodenstock beat Schneider to the finish line with
respect to a noticeable improvement in general plasmat view camera lenses, so highlighted this with an Apo marketing designation on the Apo Sironar N series.
Now you've got the Apo Sironar S series which is equally corrected a stop or more wider open. But neither meet the Apo standard for true reproduction lenses like
4-element Apo Nikkors, which might be cheap now on the used market, but originally were quite expensive. And all along, both Schneider with its Apo Artar series,
and Rodenstock, with Apo Ronar, had been making lenses closer to true apo designation.
coated lenses are inferior. I've used single-coated lenses which were better in almost every category than later multicoated equivalents; but they also employed
glass no longer available. So it all depends. Likewise, with reference to "apo". Among German manufacturers, Rodenstock beat Schneider to the finish line with
respect to a noticeable improvement in general plasmat view camera lenses, so highlighted this with an Apo marketing designation on the Apo Sironar N series.
Now you've got the Apo Sironar S series which is equally corrected a stop or more wider open. But neither meet the Apo standard for true reproduction lenses like
4-element Apo Nikkors, which might be cheap now on the used market, but originally were quite expensive. And all along, both Schneider with its Apo Artar series,
and Rodenstock, with Apo Ronar, had been making lenses closer to true apo designation.