How does lossless compression in Fuji RAF files work? (2020) • Hacker News Board

Re: How does lossless compression in Fuji RAF files work? (2020)

#71

Post by sunnybeetroot » Thu, Oct 02, 2025, 1:08 AM UTC

atombender wrote: post #70

sunnybeetroot wrote: post #67

Earlier quoted context omitted.

Why yellow and not red? I find red much easier to see. Also I tend to agree about the X-E line but it’s been refreshing to use the X100IV with the inbuilt ND filter and not worry about changing lenses.

I don't know, but I recommend trying it, you might be surprised. The X100IV is awesome, of course, and if I could afford it, I'd probably own one. But it's more than 2x what I paid for my X-E3. A fixed-lens camera is built around the limitation of having just that lens. To me, if I only bring the 27mm with me when shooting, then that is exactly like a fixed-lens camera. But it also means I have the option to take it…

Will give it a shot!

Definitely agree with you, I think if Fuji made the X-E range contain an ND filter, then it would be the ultimate every day camera. Whilst the 27mm F2 on the X100IV is nice, being able to go to an even lower aperture can be priceless in some situations.

Re: How does lossless compression in Fuji RAF files work? (2020)

#72

Post by tecleandor » Thu, Oct 02, 2025, 3:28 PM UTC

LegionMammal978 wrote: post #69

graemep wrote: post #39

Earlier quoted context omitted.

What is the problem there? It essential provides an unlimited license any Adobe patents needed to implement DNG, and revocation if you assert a patent against Adobe related to DNG.

It provides an unlimited license specifically for reading and writing spec-compliant files, which could conceivably open you up to issues if you have implementation errors or attempt to extend the spec.

Yep, or doing something like a forensics software, that could be considered out of the 'correct implementation'.

Re: How does lossless compression in Fuji RAF files work? (2020)

#73

Post by the_lucifer » Fri, Oct 03, 2025, 12:15 AM UTC

vadansky wrote: post #12

the_lucifer wrote: post #6

As someone who shoots on Fujifilm (XT-3), this was an intensely fascinating read. Thanks, now I have half a mind to sit down and re-implement this code, just to get a feel of how it works.

I've been thinking of buying that camera for a while, do you recommend it? Do you have anything to say that will finally push me over the edge to actually but it?

Apologies, didn't check HN for a while. I recommend it if you can get it around ~500-ish USD. I paid $750 (for the body) + $150 (for a 23mmF2 lens) in Jul 2024 used with a bunch of accessories including 4 batteries.

The biggest annoyance I've found is the horrendous battery life on the X-T3. For a long day outside on a trip, I end up going through at least 3 batteries.

The XT-4 is identical to the X-T3 (well, more so than any other x-tn -> x-t(n+1) camera) but fixes a few of the flaws in the X-T3 with massively improved battery life + IBIS which I'd recommend just because a lot of acclaimed lenses these days forgo OIS (ref: many Sigmas for instance), which could be worth it over the long term.

If you are very price sensitive then the X-T3 is still a really good purchase, with nifty features like dual SD slots which make it great to have backups/RAW+JPEG on two cards. Compared to an average photo from a phone, there just isn't much computationally going on in mirrorless cameras so even an x-t1 would be a good purchase.

If you want to shoot photos for the experience rather than getting clinically perfect images, and do not want absolute performance wrt focusing etc., it's definitely at the top IMO; analog with every control having a dedicated physical control (ISO, Shutter Speed and Exposure Compensation and aperture on Fuji lenses). I love it because it's the equivalent of driving an air-cooled Porsche, warts and all.