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Cake day: June 13th, 2023

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  • The 18-150 is a super zoom, so it gives up some image quality to give you everything in one lens. It goes from reasonably wide to very telephoto in one swoop. Optically, that much zoom means they have to make compromises somewhere, so it’s not the sharpest lens, and at the 150 end it’s not exactly what I would consider bright - but most people only use that outside in the daytime when it doesn’t matter. They’re really popular for people on vacation or who want very little kit, and if you’re just posting pictures to the web you probably won’t notice the flaws.

    If you’re buying used damage is pretty much always a concern unless you’re buying from a reputable used dealer who has checked out the lens for you. Especially since you’re a beginner thats probably your best opinion. If you’re buying personally you’ll want to inspect the lens thoroughly for issues, and it’s best if you can meet in person and try the lens on your own camera and look for flaws in any images you shoot. If you’re buying online just make sure they have a good return policy and that they seem to honor it.

    Small list:

    • Make sure it zooms smoothly, and if you hold it with the lens pointing down the zoom doesn’t creep from where you left it. (Or doesn’t do it too bad, some lenses do that brand new)
    • Make sure the focus motors work ok - there’s a lot of variance in how different motors sound, so finding a review with audio of them can be helpful.
    • Make sure the aperture works properly.
    • Make sure the filter threads are ok, as well as any hood bayonets.
    • Make sure the mount is ok, all the contacts are ok, and it communicated with your camera properly.
    • If the lens is supposed to have seals make sure they’re in place and in ok shape. If they aren’t check if they’re user replaceable, and negotiate accordingly.
    • Make sure the front and back lens elements are clear and free of scratches. Sometimes there can be tiny minor scratches in the coatings that are only visible in some light, they often don’t have a large impact on image quality but negotiate accordingly.
    • When you look down the lens it should be clear and clean. If you see any cloudy areas or mold run away.
    • Find a better list than this online, there has to be one this is just the basics.

    With all that said, I have a few lenses that I’ve bought knowing they have issues and like 90% of the time it’s hard to notice in actual photos.

    Honestly the best advice is to just get out there with something and start learning. Don’t spend too much money and don’t commit until you know what you want.


  • That sounds like a job for the kit lens. The r50 should come in a kit with a 18-45, which is worth using for a while. If you have to buy something the 18-150 is a tad on the slow side (f stops wise, not actual speed) but it should be able to do most things reasonably well, and it should fit in your price bracket. You could get a wide and a longer macro, but you’d be looking at the real cheap prime manual focus lenses (which I like, but they’re not exactly beginner friendly).

    It’s really worth really double checking if you can find a used one though. Kit lenses are incredibly common, and way cheaper on the used market because of it. They’re a great starting point until you have enough experience to know what you really want, and a couple hundred USD can go a long way toward something like a fast portrait prime lens or whatever you decide on.




  • fhqwgads@possumpat.iotoScience Memes@mander.xyzScIence
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    2 months ago

    https://en.m.wikipedia.org/wiki/Metric_prefix

    In case you wondered where they came in the list like I immediately did:

    • quetta Q 10^30
    • ronna R 10^27
    • yotta Y 10^24
    • zetta Z 10^21
    • exa E 10^18
    • peta P 10^15
    • tera T 10^12
    • giga G 10^9
    • mega M 10^6
    • kilo k 10^3
    • hecto h 10^2
    • deca da 10^1
    • ——
    • deci d 10^−1
    • centi c 10^−2
    • milli m 10^−3
    • micro μ 10^−6
    • nano n 10^−9
    • pico p 10^−12
    • femto f 10^p−15
    • atto a 10^−18
    • zepto z 10^−21
    • yocto y 10^−24
    • ronto r 10^−27
    • quecto q 10^−30

  • To be fair, if Lemmy’s discoverability wasn’t trash you could probably have both. I would love to have a bunch of small instances that were focused on individual topics, like Star Trek or anime or knitting or gardening or whatever and just jump between them. It feels like that’s what federation was built for.

    But because Lemmy is so small right now and discoverability is so bad it seems like almost every instance is either intentionally a tech / general purpose one or so adjacent it might as well be. As long as there’s just one community for that thing that people can find that would be great, but instead there are like 10 spread around 3 different instances and 8 of them are dead and 1 just bot reposts the subreddit - and it’s really hard to tell which is which. Like, if everything was actually on one instance at least you could just list everything.






  • From a technical level you should use something lossless in this situation, but it really quickly becomes impractical. Actually lossless 1080p60 is going to be something like 500mbps, so if you’re playing for an hour I hope you have a spare 2tb drive laying around. The artifacts in really high bitrate compressed video are so minimal that they basically don’t matter. Often codecs do noise removal first thing so whatever minor artifacts still exist will get smeared over by that anyway.

    Also when you are testing make sure there’s some movement in the video. AV1 especially has modes for presentations and things that basically make a PowerPoint, so sizes might be unrealistic if you’re just recording your desktop. I don’t think that gets enabled in handbrake but it’s been a while since I looked.


  • If you’re seeing any artifacts in the original video, you probably need to re-record in a higher bitrate. It needs to look identical to uncompressed. Your later encodes will be trying to encode all the artifacts in the original video, which could be why the file sizes keep getting bigger - you’re giving it noisier video than the original.

    50mbps for recording as an intermediate like that is well within the realm of normal. You can try having obs record in 264 with a quality setting instead of a bitrate setting, which can save space when things are more static - something like cq 6 or lower can do pretty well.

    Unfortunately, yeah finding the sweet spot does take forever. One thing I would recommend is once you have an idea where you want to land, try a few much longer videos and see what the differences are. Slower paced sections might compress much better than the fast action stuff in one codec or another. Again it’s all kind of a balancing act on where you want to be.




  • Because it’s just for personal archival, I would recommend recording in super high bitrate 264 or 265 depending on what your card can do in real time, then compressing that file later using either av1 or 265, depending on which works better for the content.

    If you’re playing in 1440p165, then you should record that to start although if it’s an option I would play and record at 1080p120. 1440 is a bit of an odd duck resolution that some stuff doesn’t really like, but it’s getting better all the time so it’s not a huge deal. More important is 120fps because if you decide to go down to 60 or even 30fps they split evenly, which is important since it means the extra frames just get thrown out. There’s no 82.5 frame so it either has to blend two together or pick one that’s at the wrong time, and neither looks good.

    Record in OBS using like, 25-40mbps in whatever your graphics card can do realtime, with all the audio tracks in something lossless like FLAC. High enough it might as well be uncompressed.

    Once you have your gameplay recording from OBS, use either Handbrake or FFMPEG to convert it to your long term storage format. Since this is such a big project I would make some samples using cheats to get an idea what the bullet-hell-iest parts will look like, then try a few different handbrake or ffmpeg settings, and see what gives you the tradeoff of file size and quality that you like. It’ll also give you a ballpark idea about how much long term storage you’ll need.

    Non-realtime encoding like ffmpeg and Handbrake is much more efficient than realtime done by your graphics card, like on the order of like half the file size for the same quality - that’s why you want the two step process. It also allows you to play in 120fps for that responsiveness, but watch at 60 or even 30fps to save some file size.

    When you set up handbrake, you’ll have a few settings to play with and make samples from - encoder, quality level, speed, fps, and rescaling.

    Encoder is probably the most important. Use either x265 or SVT-AV1. In my experience, they’re close in terms of efficiency, but AV1 pulls ahead in certain situations. AV1 is more efficient about large static sections and when it breaks up it just looks blurry. 265 is better at retaining texture, but when it fails its gross digital blocks. 265 is faster than AV1, but when you push AV1 and it takes 1000 years it does a better job. Basically, run a lot of tests and then decide.

    Scaling is where you go from 1440 to 1080 and is probably the least important for file size. I honestly wouldn’t bother with it, but you can try. Like I said, technically some TVs don’t like 1440, and everything supports 1080, but I wouldn’t worry about it too much.

    FPS I have the least experience with. My guess is that going do something lower is going to save you some size, but its really going to depend on the codec and the content.

    Quality level is the most important setting - just set it to what you think is watchable. It doesn’t use a bitrate, it adjusts the bitrate to get a constant quality level, so it’s much more efficient. It’s important to note that they aren’t exactly the same at every speed setting, so be careful.

    Lastly is the speed. 265 goes from very fast to very slow, and AV1 goes from 9 (fast) to 0 (stupid slow). Personally I use slow or very slow for 265 and about 4 for AV1, but if you have a lot of video to crunch through you might want to crank that up a bit.

    For audio use OPUS. 96 is the default “bitrate” and I find it to be enough. Some players don’t like it but if you’re thinking about using AV1, anything that would support AV1 supports opus.

    The main thing will just be doing a bunch of video encode samples and finding the settings and workflow that’s right for you.



  • After having to fly United a bunch of times this summer, they changed the names of the tickets and invented a new “no one wants that” tier.

    There’s now standard economy which is what everyone’s used to and gives you a “personal item” (i.e. a backpack or a purse) and a “carry on item”, and basic economy which only includes the personal item. They mention it on their website, but on third party websites its not quite as obvious which ticket you’re getting.

    It has been a nightmare - on every single flight there’s a crowd of people pissed that they aren’t allowed a carry on with their ticket, with them having to run halfway across the airport to upgrade their tickets or pay 3x as much for a bag they thought was included.

    If you’re being charitable, it’s a roundabout discount on checked bags to fix the problem they invented by charging for checked bags and then sucking at handling them. Every single flight I took had them asking for people to check their carry on for free because the bins were going to be overloaded, and it seems like they want to incentivize actually checking a bag again.

    I started instantly asking them to gate check my carry on (for free) because honestly, the airport experience is way nicer when you don’t have to deal with your luggage all the time. If you check 1 bag as a couple you might even save money, and if you’re alone it might be worth the difference to not have to worry about only having two pairs of pants on your three week trip.

    More realistically they want to normalize having to pay for carry on the same way they did checked bags, and they are trying to sneak around that by starting with only their new BS economy tier. Wouldn’t surprise me if they got rid of “basic” and just made carry on a “business class” or whatever amenity.


  • I’ve used stickermule a number of times, and signed up for their newsletter. They sent out a very annoying political sms blast and email like a week after they started their sms deal. They got a ton of bad press for it so I kind of doubt they do it again. Their normal weekly marketing email is usually just a sentence or two that says what’s on sale that week so it stood out. They have occasionally have the $9 for 50 deals that you can use on the same account, it seems like once every year or so. They were more common but they probably lose money on them as they have said a couple times they weren’t going to do it again.

    The actual service is really good. They aren’t crap stickers, they use vinyl with good adhesive, their print quality is good, and the top vinyl layer is one of the thicker ones around. They misprinted a batch of mine and reprinted them the same day that I contacted them at no cost.

    The only tip I have is to keep a design that you want printed ready to go. They cancelled a $9 for 50 order I had open but hadn’t uploaded after about 10 days. Which is kind of understandable but annoying since that’s not how their warning email says it works but whatever.