Oly 150-400 lens size

Started 1 month ago | Discussions thread
whumber Veteran Member • Posts: 3,234
Re: Oly 150-400 lens size

glassoholic wrote:

Adrian Harris wrote:

It doesn't have to use glass, some of the best optics on the market use lenses made by growing crystals. They are not only really light, regarding CA and other distortions they perform much better.

The down side is - they're seriously expensive. Glass is a lot cheaper.

I have never read that the Canon Fluoride crystal is lighter than glass... it may be but would it significantly lighten a typical lens?

For a given volume a lens, as in the glass rather than the entire assembly, made of CaF2 will be something like half the weight.

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