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Messages - Lee Jay

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196
EOS Bodies / Re: Global Shutter Coming to Canon DSLRs? [CR1]
« on: January 23, 2015, 08:25:50 PM »
CFast is based on Serial ATA which is not being developed past the current 6Gbit/s. Read for yourself at http://serialata.org http://www.compactflash.org

16Gbps SATA:
http://en.wikipedia.org/wiki/Serial_ATA#SATA_revision_3.2_.2816_Gbit.2Fs.2C_1969_MB.2Fs.29
http://en.wikipedia.org/wiki/SATA_Express

It's not 16Gbps SATA, it's 16Gbps SATA Express. Which is different. SATA Express is essentially SATA software stack on top of electrical PCI-Express. (So different connector, etc, etc) Would of course be great with a 16Gbit/s SATA Express host that can also take CFast 2.0 cards, but so far there is no evidence that is happening. I have no idea if that's even possible as there are limited number of connector pins one can fit inside a camera. (They make dual host connectors for PCs that can take both types.)

Should also mention that SATA Express is largely viewed as a transitional standard. So far it has rather few takers, and a lot of companies are looking to bypass SATA Express all together and jump to the next thing. So it doesn't appear at this point that SATA Express will gain the widespread adoption and support that SATA has.

So, IMHO CFast 2.0 appears to be the last iteration of that memory card standard. With whatever that means for widespread adoption, residual value and support. If that is not the case, and CFast 3.0 that is backwards compatible with CFast 2.0 cards is in the works, the players who support that should publish a future roadmap ASAP!

There is of course something to be said about what works here and now! Even if it isn't upgradeable in the same way we have become accustomed to with CF cards. :)

Yes, SATA Express is the follow-on to SATA, and XQD is the follow-on to CFAST.

http://en.wikipedia.org/wiki/XQD_card

Successors aren't always backward compatible.

198
EOS Bodies / Re: Global Shutter Coming to Canon DSLRs? [CR1]
« on: January 23, 2015, 01:08:48 PM »
I have the xt1 and regularly use the electronic shutter. I don't quite understand the science behind the differences between an electronic shutter and a global shutter. But I do know that they are not the same.

One is for both curtains (start and end of the exposure), electronic is for just one.

199
EOS Bodies / Re: Global Shutter Coming to Canon DSLRs? [CR1]
« on: January 23, 2015, 10:25:57 AM »
Obviously you're going to run into limitations, well before 1/1000.  I find (unscientifically), my flashes at full power seem to be somewhere around 1/200 - 1/300 range.  So there's limits of what you could do.  Many flashes might be down to 1/4 power by 1/1000...  but it's still better than HSS.

I did a moderately careful test of a 580EX.  It's flash power tails off, obviously, but most of the light is emitted in about 1/800th-1/1000th at 1:1.  That's why I think faster than 1/1000th has very limited usefulness, at least with that flash.

And I'm not knocking the difference between 1/250th or so and 1/1000th!  That's still two stops of ambient light quenching and motion freezing.  I'm just questioning the usefulness of going to 1/4000th or 1/8000th.  You're going to start quenching the flash power too, just in a different way than HSS does it.

200
EOS Bodies / Re: Purchase 5DIII now, or wait for 5DIV?
« on: January 23, 2015, 09:48:50 AM »
As for waiting, why?

There are two reasons for me:

The 5D3 has a pretty high level of fixed pattern noise at high ISO.  The 7DII seems to solve this.  I'd like to see them solve it on full-frame too since fixed-pattern noise is really hard to remove, and pretty distracting to me.

I want to use this camera for video as well as stills and the dual-pixel focusing system on the 70D and 7DII are pretty game-changing in that area.  Again, I'd like a full-frame version of the same technology.

Since Canon obviously has the technology to solve both "problems" (since both are solved on the 7DII) I'm looking forward to the 6D and 5DIII replacements before I purchase a new full-frame camera.

201
EOS Bodies / Re: Global Shutter Coming to Canon DSLRs? [CR1]
« on: January 22, 2015, 11:29:07 PM »
I'd like to hear why people want a very fast sync speed.  I know quite a lot about this topic and can see direct applications for sync speeds up to about 1/1000th, but at that point applications get a lot more limited.

202
And you have to upload images, if you use the IOS/Android part of the cloud service. You don't have to do that, right - but so I can't use this tablet feature... And the upload isnt needed really either (sync the smartpreviews by USB?!), so who knows, if they will add some more restraints to the normal workflow either, "because its necessary"?
Again: I don't trust them.

There are other ways spammers get your email than some company selling it.  And if you don't like LRMobile, don't use it!  I don't.  The cloud upload is too slow to be useful.

203
I have Photoshop CC / LR5 subscription model (I had LR5 but wanted the mobile version which you only get through subscription).
I find LR clunky and many features overly complicated and not very intuitive, Photoshop is slightly better but frankly I found Aperure to be far far easier to use. Apple have something coming in 2015 to replace Aperture and iPhoto although they have been a. rubbish over the annoucement about retiring Aperture and b. rubbish at oulining what exactly the new photo application will be. For that reason I moved to Adobe but the move for me has been a nightmare and frankly I dont like Adobe.

I will wait to see what Apple do but Im seriously considering going to Capture One Pro its simplier and does what I want without being forced down the subscription route the US software companies are moving too.

I'm not fond of the LR interface, but PS, frankly, has the worst user interface of any piece of software I've ever used in 33 years of computing.  I've only used the C1 trial, mostly because the user interface was so much worse than LR's.

204
I just hope I can still purchase a full downloadable version; I don't want a cloud version

Ditto.

I ditto your ditto and raise you a "me too".

I doubt that'll be a problem.

205
EOS Bodies / Re: High Megapixel Camera Coming in 2015 [CR3]
« on: January 22, 2015, 10:08:43 AM »
I'm guessing here, but I think when he claims that focus has no bearing on image quality he is referring to the parameters that are not under user control. User can not remove noise or add DR to a sensor, but a user can change the focus. Just a guess.

The user CAN remove noise (lower ISO, ETTR, processing, stacking) and add DR (lower ISO, ETTR, stacking, HDR).

All of these "user CAN ..." result in a picture of lower IQ than would be possible with a sensor that had the same native DR range and low noise.

You sure?  I've shot at ISOs less than 1 using these techniques.  What sensor can I buy that can manage lower noise than my approach to get to ISO 1?  Oh...my approach also allows you to dramatically exceed the resolution possible from atmospheric disturbance, and allows you to get to tiny fractions of a pixel worth of motion blur despite dozens of pixels of motion during the exposure.

Face it - IQ is about avoiding aberrations, and aberrations include noise, motion blur, out of focus blur, CA, flare, spherical aberration, and others, not just noise.

206
EOS Bodies / Re: High Megapixel Camera Coming in 2015 [CR3]
« on: January 21, 2015, 10:23:07 PM »
I'm guessing here, but I think when he claims that focus has no bearing on image quality he is referring to the parameters that are not under user control. User can not remove noise or add DR to a sensor, but a user can change the focus. Just a guess.

The user CAN remove noise (lower ISO, ETTR, processing, stacking) and add DR (lower ISO, ETTR, stacking, HDR).

207
Lenses / Re: Fast lenses at a crossroads?
« on: January 21, 2015, 12:28:59 PM »
...but to ask for a 800 f/1.4 would be just too much...

Why? Just over 570mm aperture opening. Who would not want a lens with 600mm filter thread? :D

You know, if you really want it, you can get a 684mm f/1.9.

http://starizona.com/acb/HyperStar-Lens---14-Celestron-Edge-HD-P3115C773.aspx



208
Lenses / Re: Fast lenses at a crossroads?
« on: January 20, 2015, 03:21:52 PM »
And the latest 16-35mm f4?  Ok, replaces the 17-40mm wonderfully, but what about the v2 16-35 that was barely better than v1?

Where is the great fast UWA and updated 50mm?

Both low priority, IMHO.  The 100-400L replacement was 10 years over due, the wide primes were a mix of acceptable and disaster, and they had to produce the STM lenses because of the new dual pixel focusing stuff, so that took some priority and the secondary benefit was that the high-volume slow consumer zooms got a pretty solid optical upgrade.  The 55-250STM is quite excellent and the 18-135STM is really pretty good for a hyperzoom.

The 16-35/2.8 is already pretty good (personally, I think my 17-40L is pretty good) and the 50s are in the "who cares" category for most people.  I'd put a 35/1.4, 135/2IS, and 85/2 IS all above a 50/1.4 replacement in priority order.

209
Lenses / Re: Fast lenses at a crossroads?
« on: January 20, 2015, 02:28:13 PM »
Good points, lee jay, but 12 or14mm at 2.8 would serve many needs.

Well, then buy a 14/2.8.  There are more than one available.  Wider could be cost prohibitive.

And that's why I just love my 15mm/2.8 fisheye, for which I paid $370 brand new.

210
Lenses / Re: Fast lenses at a crossroads?
« on: January 20, 2015, 02:08:11 PM »
1)  Making a lens as wide as 11mm with a pretty big zoom range also fast would be very, very difficult.  It would probably double the price, if not more.  The Nikon has a much longer wide-end and thus a much smaller zoom range (1.7 versus 2.2).
2)  Canon is making new, fast lenses.  70-200/2.8L IS II, 35/2IS, for example.  Sigma is as well with the Art series of primes and the 18-35/1.8 for crop.
3)  An f/4 zoom on full-frame is still exceptionally separated from a cell phone camera with a 1/3" sensor and an f/2.4 prime.  Around four whole stops separated, in fact.

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