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RF 800mm f/5.6 & RF 1200mm f/8 L USM IS announced
#14
(02-25-2022, 12:27 PM)Brightcolours Wrote: The purple ones are fluorite elements, the front one is glass (so does not need a glass protective slab in front).
 Ok, I get it now ........ Canon has saved weight by using smaller diameter/ light weight fluorite elements not so far forward in the lens body .... whilst only having one glass element which is part of the optical formula in front with the appropriate tough fluorine type coatings amongst others......

  You got to hand it to Canon ....... masters of light weight optics ......

thanks again !!
Dave's clichés
  


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RE: RF 800mm f/5.6 & RF 1200mm f/8 L USM IS announced - by davidmanze - 02-25-2022, 04:59 PM

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