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Comment Re:I maintain (Score 1) 41

They're using International Standard Texas feet. Everything being bigger in Texas, they decided to have their own version of the "foot" in 1792 CE, and but some of their closet Communist legislators set the "ft(Tx)" to equal 1m. Texas will require America to convert to Texas feet during their 2025 secession campaign, as an alternative to another very un-Civil war.

Comment Re: Oh No (Score 1) 42

More people should have the salutary experience of being hoist on their own petard. Or, indeed, of having to return to their petard to put in a second fuse after the first one (seems to) go out.

It is most educational. Not necessarily survivable, but still educational for the audience. Where's that "Exploding Whale" video? https://en.wikipedia.org/wiki/.... As Voltaire said, "pour encourager les autres".

Comment Re:Do you care? (Score 1) 90

Looking at the reflection of the Sun in a still bowl of water (though finding a black washing-up bowl could be challenging) works a well, and drops the light intensity to around 1% of the incident intensity without complex calibration. But it wobbles, so may not be suitable for your photographic plans.

Comment Re:Be careful with auto-darkening helmets (Score 1) 90

I do not recommend using this style of helmet to view the sun. The reason is that will not always auto-darken when held up to the sun

The glass and LCD material will still absorb the most-damaging emissions from the arc (or the Sun) passively, even before the LCD material and it's driving circuits decide it's time to go dark. So they'll protect the user from the worst effects of arc-welding (bright UV) and solar viewing (IR - heat zapping the retina) even if the "comfort" function of the darkening hasn't switched in yet.

Comment Re: Welding helmets (Score 1) 90

but the thickness means you see internal reflections of any really bright point light source.

Which totally ruined my "Bailey's Beads" shot of the 1999-08-11 eclipse. Which is why I got an ND5 (1 part in 10^5) and an ND2 filter a few years back in a stackable system. And I've not had an eclipse to photograph since. I managed to lash up a projection system when my step-daughter told me "there's meant to be a partial solar eclipse today" - and she didn't even bother to take her photos (of the projection, and the lash-up) into science class next day. Well - she's "arty", not "sciencey".

Comment Re:Welding helmets (Score 1) 90

I am so going to piss myself laughing at the idiots who will come out of the woodwork when (not "if", "when") the next of the Cascadia rhyolitic volcanoes goes off. There were a couple of corkers of Darwin Award contenders the last time St.Helens went off - though I didn't inspect if any of them were actually contenders (they might have already contaminated the gene pool before their spectacular stupidity.

I'll grant an "out" for the inevitable people who think "I've got a week before it "goes", or "I don't think it'll go at all" ; they're gambling on either timing or an actual event, which is just a gamble, and getting it wrong. Flogging up hill towards the summit of Etna, steaming away gently in front of me, I was making the same gamble, with a degree in geology under my belt. (The grumbling became an explosive, if small, eruption two days later while I was SCUBA diving up the coast a Taormina - no cloud when I put my gag in ; ash clouds when I took the gag out ; didn't hear a thing.)

But there will be people who will insist "no gosh darned volcano is gonna drive me form my home", and die for their insistence. No loss there.

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