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Joined 6 months ago
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Cake day: January 4th, 2024

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  • FBJimmy@lemmus.orgtoScience Memes@mander.xyzRecognize the mother of Wifi
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    2 months ago

    Great to recognise this invention.

    I was surprised by the choice of ‘Mother of Wi-Fi’ though - Wi-Fi hasn’t used ‘frequency hopping’ as such since 802.11b was released back in 1999 - so very few people will have ever used frequency-hopping Wi-Fi.

    GPS only uses it in some extreme cases I think, but I’m not an expert.

    However, Bluetooth absolutely does depend on it to function in most situations, so ‘Mother of Bluetooth’ might have been more appropriate.








  • Just to add in case you’re not aware, the EF-RF adapters are literally just spacers that shift the lens mount to where it would have been if there was a mirror in there - optically it’s just 24mm of air, so no quality impact at all.

    The only thing to keep in mind is that there is a slight autofocus slow-down with the much older lenses, but not enough to bother me.


  • FBJimmy@lemmus.orgtoPhotography@lemmy.mlDSLR vs Mirrorless Decision
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    4 months ago

    I literally just faced this same dilemma! I went online looking to upgrade the kit lens I’ve had on my Canon EOS 70D for nine years and got sucked into the mirrorless hype.

    In the end I sortof ended up upgrading both… I got a great deal on a second hand Canon mirrorless body, and because it has in-body image stabilisation I could then spend a lot less money to get a 25 year old ‘L’ series EF lens rather than a newer one with IS in the lens.

    I’m extremely pleased with this set-up so far, and even more pleased that I can add to my lens collection in future for much less money than if I needed IS hardware in every lens.




  • I agree it’s good that the article is not hyping up the idea that the world will now definitely be saved by fusion and so we can all therefore go on consuming all the energy we want.

    There are still some sloppy things about the article that disappoint me though…

    1. They seem to be implying that 500 TW is obviously much larger than 2.1 MJ… but without knowing how long the 500 TW is required for, this comparison is meaningless.

    2. They imply that using more power than available from the grid is infeasible, but it evidently isn’t as they’ve done it multiple times - presumably by charging up local energy storage and releasing it quickly. Scaling this up is obviously a challenge though.

    3. The weird mix of metric prefixes (mega) and standard numbers (trillions) in a single sentence is a bit triggering - that might just be me though.