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In practice though most lenses and applications move away from being Fresnel. The lights get better or a camera or other screen technology replaces it. Fresnel
by Theodores 7y ago
In practice though most lenses and applications move away from being Fresnel. The lights get better or a camera or other screen technology replaces it.
Fresnel lenses are like motorbike sidecars, they are a cheap hack. But if I was to post 'you don't see motorbike sidecars these days' then some nitpicker on HN would Google search a new Kickstarter project of a motorbike sidecar and - two seconds later - mod me down for being generally but not universally correct.
As I understand it the Nikon lenses are not 'Fresnel' as we know it. The idea is to combine a regular lens with a Fresnel lens to remove chromatic aberration. The weight saving isn't what it is about since there is still a regular lens that the Fresnel lens works with.
- i_am_proteus 7y ago> In practice though most lenses and applications move away from being Fresnel. Tungsten fresnel lights (and now LED fresnel lights) are very common in videography. The lens provides a simple spot/flood mechanism.
- rangibaby 7y agoThe fresnel element version of the 300mm f/4 lens reduces the weight by half and the size by one third compares to the non-fresnel version
- hug 7y ago> But if I was to post 'you don't see motorbike sidecars these days' then some nitpicker on HN would Google search a new Kickstarter project of a motorbike sidecar and - two seconds later - mod me down for being generally but not universally correct. I'm of course not going to downvote you, but just to help you out with your point IMZ-Ural still manufacture motorcycles with sidecars to this day, and in fact are working on a fully electric model.