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Cake day: July 13th, 2023

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  • You’re mostly right with the depth of field being the big difference but the image being darker is not a function of aperture (f-stop) directly, but rather overall exposure. At the same ISO setting, two identical shots in the same lighting would be the same brightness with truly equal exposure: the reduction in aperture (increasing to m the f-stop number to a higher value) would be compensated for with an equivalent decrease in shutter speed (in simple terms, constricting the hole lets in less light, so we leave the hole open longer to let in the same amount as before).

    In the example, if the scene is darker it’s because the exposure changed, not just because of the aperture.

    Additionally, the number is shown as a fraction because it is a fraction. The “f” in the value (f/2.8) is a variable that stands for “focal length”, that being the focal length of the lens being used. So, for example, a 50mm lens set to f/2 would have its aperture set to a 25mm diameter. (50/2)

    The reason the numbers are strange numbers and non-linear in scale is because they correspond to aperture diameters that let in either double or half the amount of light from the stop next to them. So adjusting from f/2 to f/2.8 cuts the amount of light in half (I think this is basically doubling or halving the area of the circle of the aperture).

    This is why a one stop change at lower values (bigger openings) has a much smaller numeric shift than a one stop change at higher values: adding or subtracting diameter of a larger circle adds or subtracts much more area than the same diameter change to a smaller circle. That’s why one stop goes only from f/2 to f/2.8 on the wide open end, but on the closed down end, one stop goes from f/11 to f/16.







  • My favorite summary and comparison of two movies was something along the lines of:

    "In The Muppet Christmas Carol, Michael Caine plays it absolutely straight, as if there were no Muppets at all, and as if he were completely surrounded by nothing but classically trained professional actors…

    …in Muppet Treasure Island, on the other hand, Tim Curry plays it as if he himself were a Muppet."










  • Anyone who thinks tariffs will do anything at all positive for the American working class is absolutely clueless.

    All they do is make prices jump for consumers. It doesn’t put domestic goods at an advantage because the domestic producers of those goods increase their prices artificially to achieve parity with import pricing.

    So prices go up for the consumer with the extra money going to either:

    1. For imported goods, to pay the tariff, a tax, to the government, which in this case wants to use that tax revenue to offset tax cuts for the wealthy.

    or

    1. For domestic goods, it’s pure straight profit for the unethical corporations who are price gouging their domestic customer base. They’re not giving the consumer a break on price and they’re not sharing the profits by giving employees raises. Hell, they’re not even taking advantage of the competitive advantage to ramp up production and create jobs. They’re just pocketing that extra cash for doing exactly what they’re always doing…passing it on to, you guessed it…the wealthy.



  • hydrospanner@lemmy.worldtoBoard Games@sopuli.xyzThe betrayal
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    5 months ago

    Generally I enjoy board games, but for whatever reason I absolutely can’t stand Ticket to Ride.

    It’s a shame because several friends and family really like it, but for whatever reason, I just can’t put together the gameplay and strategy in my mind, and either because of that or in addition to that, I’ve never once had fun while playing it.

    This and Farkle are two of the few that I just try to politely decline now. I’ll make everyone a snack or something and sit out.