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Messages - Drizzt321

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646
A comment on the write speed problem, it might be that the CF card has to have good garbage collection, because if you want to write to a NAND block that already has data, you first have to clear it, then write to it. Some of the cheaper ones might not implement that well, and it might be that the better CF card controllers can detect when a card is reformatted (rather than delete files) and mark those blocks to be cleared out in advance of need like the TRIM command that modern SATA SSDs support.

I will test this out. Based on my experience and what you're suggesting, I think the best route will be to fill a card in sequence and then reformat after it fills up. Hell, I won't even preview clips. After I get sustained speeds, I can test and figure out what compromises the card speed.

I'm just extrapolating based off of modern SSDs. Ah, looks like CF 6.0 introduced UDMA7, as well as TRIM command just like SSDs have. So I imagine that's what is being used during a delete/quick-format to tell the controller that it no longer needs to keep the NAND blocks permanently, and can clear them out at will. This is part of what the controller garbage collection does, and usually operates in the background. So it might be you need to leave it sitting for a short bit in the camera/reader after deleting/formatting the card to give it power and let it do it's background cleanup to keep maximum performance.

The test you're describing is part of what Ananadtech.com does during it's SSD tests, as well they now check the consistency of latency which can be important to avoid buffer overruns in a case like this, where if it has a brief spike in latency that might reduce overall throughput just enough that you start dropping a few frames.

647
EOS Bodies - For Stills / Re: what to do
« on: May 25, 2013, 02:22:19 PM »
is gitzo a good tripod

Gitzo is a good brand, as is RRS (Really Right Stuff), and I have a Benro which is a chinese knockoff of some of the more expensive Gitzo/RRS, but it's pretty good quality. I'd recommend going for Arca-Swiss type heads (Gitzo, RRS, some others) rather than Manfrotto which apparently doesn't have just 1 standard for quick release plates, but a couple.

However, tripods (plus head) can easily range up to the price of a good lens, however as long as you don't knock it around too much, they tend to last as long as a good lens.

648
EOS Bodies / Re: New AF Technology Coming in July? [CR1]
« on: May 25, 2013, 02:18:37 PM »
The surprise is that the 70D will focus better than the 1DX and that only Rebels and xxD will get top AF from now as Canon respond to constant cries that the lower tier bodies always have worse AF.  ;D ;)

Somehow I don't think that it will have more capabilities and 'focus better' than the 5d3/1DX. From what I've seen Canon has a history of introducing some new bits of technology in various forms in the lower end models, and once they see if it's useful or the kinks get worked out, they put it as a flagship feature in the top end cameras, but doing it better.

Not having used the 7D, I've heard it's AF control interface is similar to the 1DX and 5d3. I'd guess Canon was testing out that way of AF control, and found that it worked well and just improved/tweaked it a bit and used it for the 5d3/1DX AF control.

649
A comment on the write speed problem, it might be that the CF card has to have good garbage collection, because if you want to write to a NAND block that already has data, you first have to clear it, then write to it. Some of the cheaper ones might not implement that well, and it might be that the better CF card controllers can detect when a card is reformatted (rather than delete files) and mark those blocks to be cleared out in advance of need like the TRIM command that modern SATA SSDs support.

Also, I bet the reason the 32GB/64GB cards have the best performance is that they have fully populated NAND die control channels (NAND controllers like to read/write dies in parallel). They may also be using SLC memory in some cases for speed and/or longevity, while the 128GB cards might be using MLC in order to get that high which tend to be slightly slower.

I'm looking forward to what XQD can do, since it's based off of PCI-Express. It'd be pretty cool if someone were to come up with an adapter that is basically a cable (modification to camera required) that has a XQD on one side, and an external SATA/PCIe high capacity, high speed SSD. Imagine capturing the full sensor in RAW and writing it out at 24/30 fps? *drool*  Heck, I wonder if with those write speeds you could do faster than 30fps...

650
EOS Bodies / Re: New AF Technology Coming in July? [CR1]
« on: May 25, 2013, 01:52:07 PM »
The camera can read your mind remotely even when not looking through the viewfinder and know which part of the scene you want it to focus on. Hmmm...can't think of the acronym that'd fit.

651
EOS Bodies - For Stills / Re: EOS 650D / 60D / 70D
« on: May 24, 2013, 05:57:54 PM »
The DIGIC primarily is the processor, AF, etc. IQ is mostly the sensor and surrounding electronics, ADC, amps, etc. For what you are talking about, Don Haines is correct that you will see little to no difference betwen the 650D and 60D. The guess is that the 70D might have an updated sensor which likely will have better quality, but we really don't know.

652
EOS Bodies - For Stills / Re: what to do
« on: May 24, 2013, 04:34:30 PM »
what about 14mm????????

14mm is pretty good, but for $2200 I'm hard pressed to recommend it for you right now. The 17-40 does quite well, especially on crop, and is more versatile and costs a heck of a lot less. For that money you can get the tripod, 17-40, and one or two non-L primes from Canon such as the 40 f/2.8 or 85 f/1.8 or 50 f/1.4, although they are not really landscape lenses.

653
EOS Bodies - For Stills / Re: what to do
« on: May 24, 2013, 02:43:16 PM »
If you're shooting landscapes, you're on a tripod, or at least a monopod most of the time, correct? Then you can generally use a longer shutter speed to avoid higher ISOs, and a mix of open and stopped down.

If you don't have a good quality tripod, and you mostly shoot landscapes, I'd actually invest in a high quality tripod first. It'll cost you as much as some mid priced lenses, but if you select the right one you can use it for years and it will help with your landscapes a lot when it comes to fine detail. Just stop down (higher f-number) your lens to around 6.3-8 which generally increases the lens sharpness by a good bit on nearly all lenses.

If you have a pretty decent tripod, then it's time to look for a lens. Do you want ultra-wide? Or is wide to normal going to be good enough? And do you think you'll move up to full-frame (FF) camera like the 6D or 5d3 in the future? For ultra-wide, there's really only a few options for crop-sensors, but they tend to be decent to good optically. You can get ultra-wide FF lenses that will work on your 500d, but they'll function as wide to normal focal length lenses.

Frankly, one of the cheapest lenses you can get is actually quite sharp. The Canon EF-40mm f/2.8 is quite sharp even wide open, and stopped down improves some. It's also only $200, I think $150 right now after the coupon/rebate that Canon is offering. It'll be in the normal focal range (~64mm effective field of view) on your camera, but it's quite cheap, and a great deal.

If you want wider, the new Sigma 35mm f/1.4 for $900 is very good optically, although it'll be ~56mm FoV for you which is still normal. Next is really looking at the Canon 24/28mm lenses, with the 24L f/1.4 probably being among the better, although still quite expensive. Then there's the Canon 17-40 and 16-35 zooms. The 17-40 might be quite good for you since it gives you ~28-64mm FoV, while avoiding the extreme corners where it tends to be quite soft. It's also relatively inexpensive, $839 ($739 right now after rebate) and pretty good optically, except for extreme corners which on a crop you won't have. The 16-35 v2 is a good bit better in the corners, and a lot more expensive. From what I know, both are quite good optically stopped down, although the 16-35 is still the better.

654
EOS Bodies - For Stills / Re: what to do
« on: May 23, 2013, 06:13:19 PM »
Some more information would be helpful for us to give you some advice. First, do you find yourself technically limited by your camera? Or are you just thinking because you have some cash you should get the latest and greatest? The general advice most often given is get better glass rather than replacing your body. A fantastic body with some crappy glass won't give you the images you think you might get. But a great lens on a decent body (and virtually all bodies these days are at least decent) can improve your image quality (which can be somewhat subjective) quite a bit. If you think you want to make photography a long term serious hobby, I'd look at Canon L series lenses, although there have been some recent releases by Sigma and Tamron which provide quite good quality at a significantly lesser price than Canon L. In the case of the new Sigma 35mm, it actually is optically better than the Canon 35mm L.

655
They have fixed the Mac GUI version of raw2dng, no more 2GB recording limit!  That was very fast and very un-Canon!

That's because it's not Canon, it's the MagicLantern team  :o

Exactly!  A rag-tag band of part-time, just-for-fun programmers can fix their software in a couple of days...meanwhile Canon announces a firmware update and then takes over 6 months to actually roll it out... :o

Well, they have some advantages. If things break and your camera no longer works, they aren't legally liable. Granted if it happens to too many people they'll just stop using it. But Canon needs to make sure things are as bullet proof as possible, otherwise they face potential massive liabilities. Also, ML runs on top/alongside the Canon firmware, they don't have to do everything top to bottom like the firmware does.

That said...I definitely agree Canon should move faster with some of their firmware updates.

656
Has anyone used the latest ML release (alpha 3 or nightly build) with the 1.2.1 firmware? Also how do I get the nightly build? Do I need to build it?

Thanks in advance.

I don't have it up in front of me, but I've been following in the forums....

1. THey are currently only working on the older firmware, I think it was 1.1.3?  The threads are like 50 deep, but in those they have links to get the older firmware so you can 'downgrade' to the version that works with current builds.

2. There are no 'guides' with everything you need to know about running the nightlies so you can play with the RAW video. YOu basically have to read through the long forum threads and take notes. ON some of those threads I saw links to outside sites where people have tried to put it all together into one guide, but if you're not familiar with a bit of coding, or more intricate computing methods, you might just want to wait till they have a more stable candidate.

That being said, the info is on a couple of ML forum threads.....I"m currently just watching the threads from the sidelines for now, but I may jump in at some point and try nightlies....

HTH,

cayenne

Yea, I'd recommend waiting until there's at least a pre-built alpha/beta that's officially released. A lot easier to install and use. Also it'll be a lot more stable and less experimental. But, if you do want to participate, please do so and help them out with any bug reports or suggestions!

657
They have fixed the Mac GUI version of raw2dng, no more 2GB recording limit!  That was very fast and very un-Canon!

That's because it's not Canon, it's the MagicLantern team  :o

658
Lenses / Re: dpreview reviews the Tamron 24-70/2.8 Di VC
« on: May 22, 2013, 11:57:38 AM »
Buy cheap, buy twice....the Canon lens isn't just optically superior....it's built to a far superior standard.
Most photographers won't need the extra build quality. But for someone who uses their kit day in day out and earns by theor results....then the pro glass is always the cheaper long term purchase.

In general I agree, however I have used the Tamron and it feels (at least) to be quite solid with good build quality. Also, I completely agree with the quote above. For the enthusiast (aka me), the value is much better than the 24-70L v2. That's not to say I wouldn't love to have one of the latter, but as far as value for the money, the Tamron is well suited for the rest of us. The only thing I find is that the zoom is reversed, and the focus is thin and closer to the camera than the Canon norm. But I can adapt.

659
Warning: Komputerbay 128GB cards are too slow. They won't work for this. I hear their smaller sized cards are faster though.

Yeah, read the FINE PRINT about the WRITE speeds of the cards.  You need at least 90MB/s WRITE for 1920x1080 24p raw video.  Not all 1000X cards are created equal unfortunately.  Seems like you can just have a fast read speed and call your card 1000X...

My Komputerbay 64GB is working great so far, I was definitely a skeptic...

Yea, the write speeds have to do with how many NAND devices and the type and the controller. More devices, SLC instead of MLC, good garbage collection algorithms. Those all contribute to faater write speeds. And higher costs.

660
I was just thinking that you could probably batch the .DNG files not just in AE/ACR but in PS/ACR with with full PS power and various other plug-ins and have video frames processed with full on stills photography quality tools and all sorts of fancy, fancy processing and super advanced sharperning, NR, coloring tools.

Ding, ding, ding!

I'm mainly a stills photographer but I’ve been starting to get into timelapse and video over the past year.

You are EXACTLY right.  This is HUGE for people that are mainly stills photographers.  Just as you describe, you can process this raw video EXACTLY like you can stils.  Exactly.  This is driving the video people nuts, but it’s huge for me.  The workflow is a bit complex but not as hard and time consuming as you’d expect.  I’ve made one crappy comparison video (will post later).  Here is my workflow:

1)     Shoot video, staying under 2GB (it tells you in real-time how much space it’s hogging)

2)     Convert .RAW file into .dng files using raw2dng.  TIME: about a minute

3)     Import .dng files into Lightroom (this is  where my workflow is a bit different than most…) TIME: about a minute

4)     Process .dng files just like you would a raw from a camera…because that is exactly what they are. (I convert my Canon .CR2 files into .dng files anyway) TIME: how many images have you edited in LR?

5)     Export .dng files as full-res jpegs TIME: a couple minutes (I guess if you were really anal about quality but not about HDD space you could convert to .tif's)

6)     Import full-res jpegs into Quicktime 7 Pro as an image sequence (exact same way you make a time-lapse) TIME: one second

7)     Export image sequence as Apple ProRes HQ 422 .mov’s (if you don’t’ want to do any video editing you can just export these as h264-compressed .mov’s or .mp4’s instead) TIME: a couple seconds for ProRes, a couple minutes for h264

8)     Import Apple ProRes 422 .mov’s into Final Cut Pro X TIME: instant

9)     Edit… TIME: see LR comment, I suck at video editing

10   Export to whatever format you want TIME: a couple minutes

Canyon do this with PNG or TIFF? In theory You can get better quality if you output the final movie at full resolution. Although...if you're outputting in a lossy format anyway, it might not make a difference.

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