March 02, 2015, 12:15:22 AM

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Messages - Lawliet

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16
EOS Bodies / Re: Bingo! New Canon 5Ds has 50.6 MP new rumored specs
« on: February 05, 2015, 06:54:25 PM »
If it is only the high resolution sensors, could please someone explain, in simple terms, why this is.

It's about pixels per image height. If you take a picture of, lets say, an animal in the zoo you could either use  ff/300/4mm or APS-C/200/2.8mm, you'll get basically the same result. The same amount of shake will cause the same details to vanish.
But if you use a higher res ff sensor you should be able to resolve smaller details - those have already been destroyed when you're applying the same standards as before.

17
EOS Bodies / Re: The Dawn of a New Digital Resolution
« on: February 05, 2015, 02:02:06 PM »
Maybe the cinema lenses are larger too, but I imagine they're designed for the 3:2 35mm frame.

Trying that would be a harsh surprise.
Some of the cine lenses are direct derivates from their conventional counterparts, unless they've got additional baffles they cover the same area.
The others are designed for super35 - about APS-C. Both the zoom range and the wide angle focal lengths are a good indicator, even if one doesn't want to read the data sheets.

18
Lighting / Re: ST E3 RT/300EX RT working with Sony A7
« on: February 04, 2015, 06:06:15 PM »
It works decently on third party cameras but make sure you always put a fresh set of battery in. Its really picky about that.

Perhaps lithium-AAs will work better? By default they have 1.7V instead of the 1.5V of alkalines or 1.2V of NiMH.
For rechargeables NiZn cells with their 1.6V might work longer as "fresh".

19
EOS Bodies / Re: Bingo! New Canon 5Ds has 50.6 MP new rumored specs
« on: February 04, 2015, 12:22:14 PM »
The only reason apart from simply money grabbing I can come up with that it's difficult or near-impossible to build in an rt transmitter into the camera body. Remember that the flash sync *relies* on 100% valid split-second communication over potentially large distances, it's not like wifi "wait and re-transmit" or "update every other minute" gps.

The V-Grip for the 645DF+ contains an Air remote, so the whole concept is possible - if Canon can't do it that would be a flaw in their design or implementation. Esp. considering the different ranges and possible shutter speeds.

20
EOS Bodies / Re: Bingo! New Canon 5Ds has 50.6 MP new rumored specs
« on: February 02, 2015, 06:15:22 AM »
I'll toss a two stop ND on if need be but I'd prefer a higher sync speed regardless.  I usually shoot at 1/125.  I've had a few hit and miss at 1/180 on the 6D where my shot is catching the shutter at the bottom of the frame. Don't hVe that problem when I slow it down a half stop.  Anyone else have this issue?

5D I-III do the same, 1/200s is hit and miss, to be sure 1/160s is a better choice. In the studio it's not that bad - but outdoors it hurts, considering that even with FP shutters you can reliably go twice as fast. Blur from the longer ambient exposure meets doubled work for the strobes.

21
EOS Bodies / Re: Bingo! New Canon 5Ds has 50.6 MP new rumored specs
« on: February 01, 2015, 09:22:55 AM »
Will it be equivalent to noise at much higher ISO without the new CFA design?

Then they could have set the lowest native ISO to lets say 50. I.e. just shift the whole sensitivity range.

22
EOS Bodies / Re: Bingo! New Canon 5Ds has 50.6 MP new rumored specs
« on: February 01, 2015, 08:21:50 AM »

So the 100mm 2.2 for Hasselblad and the manual focus 85 or 90mm 1.9 from Mamiya transform roughly into f/1.0 :)

More like the f/1.2s , depending on how you round to get that number.
And the sensor format, of course - being able to change that just as easy as the lens shouldn't be forgotten :)
The limited availability of larger then 645 sensors is annoying though.

23
EOS Bodies / Re: Bingo! New Canon 5Ds has 50.6 MP new rumored specs
« on: January 31, 2015, 05:14:38 PM »

I would think the biggest differences/advantages of medium format are:

1. Shallower depth of field.

MF lenses rarely are what one would consider fast in 35mm, f/4 or f/5.6 are quite normal, f/2.8 takes the place of f/1.4. They're rather designed to avoid the flaws lots of small frame lenses have wide open. And you've got the leaf shutter to avoid mortons fork of ND filters or f/16.

24
EOS Bodies / Re: Sony Sensors Coming to Canon DSLRs? [CR1]
« on: January 29, 2015, 03:11:31 PM »
Phase detect - yes. DualPixel Auto Focus however as concept has been made by ONLY one vendor of 4/3 camera.... I believe it was Fujitsu... not sure about the name.

Considering that DualPixel as such has mainly drawbacks (no cross type AF, can't be read fast enough with the current architecture) I'd go rather for the effect then the specific implementation.

25
EOS Bodies / Re: Global Shutter Coming to Canon DSLRs? [CR1]
« on: January 29, 2015, 01:42:15 PM »
I don't doubt it. It's just silly to respond to a desire to avoid a car battery-sized power source with a rig including a car battery-sized power source.

Do you really believe the Move is the size of a car battery?! So much for preconceptions...

26
EOS Bodies / Re: Global Shutter Coming to Canon DSLRs? [CR1]
« on: January 29, 2015, 01:10:47 PM »
But note it doesn't meet one of the original requirements (bolded).
So much for spec reading vs. actual experience - the latter says it meets the requirement. Compared to speedlights it's actually a reduction in bulk and weight. thats if your intent involves taking pictures.

27
EOS Bodies / Re: Global Shutter Coming to Canon DSLRs? [CR1]
« on: January 29, 2015, 01:04:07 PM »
The issue there is that you need to be very, very close to your subject for the flash to make any real contribution to the ambient light.  So this tends only to work for macros.

Lets see, a Move1200L/Para222 nets me f/16@Iso100@10m, about 3 stops over ambient at high noon when used with the LS lenses. With recharge times about in line with the frame rate of the back.
Not my definition of very close or macro.

I agree, I can get f16 at 100iso at 10' with a single $500 Einstein. What we don't get is short flash duration at that power, the Einstein is around 1/666 sec t1 duration so much faster than that and you are losing flash power anyway, the Broncolor is an even slower 1/375 sec t1 duration at full power.


That's why I used numbers one gets in speed mode (at 400Ws, not full power), resulting in a t0.1 better than the sync speed of the lenses and the triggers. Helpswith the recycle time as well.

28
EOS Bodies / Re: Big Announcements Coming Next Week [CR3]
« on: January 29, 2015, 12:22:00 PM »
It's about shooting, not necessarily the end display.

That 'argument' is asinine.

Only to those unaware of the color subsampling the Bayer-pattern involves.
Some comp work done with CG footage makes the shortcomings of subsampled material even harder to ignore.

29
EOS Bodies / Re: Global Shutter Coming to Canon DSLRs? [CR1]
« on: January 29, 2015, 12:09:20 PM »
The issue there is that you need to be very, very close to your subject for the flash to make any real contribution to the ambient light.  So this tends only to work for macros.

Lets see, a Move1200L/Para222 nets me f/16@Iso100@10m, about 3 stops over ambient at high noon when used with the LS lenses. With recharge times about in line with the frame rate of the back.
Not my definition of very close or macro.

30
EOS Bodies / Re: A Sony & Canon Sensor Partnership Mentioned Again [CR1]
« on: January 28, 2015, 10:49:38 AM »
Canon has just put out the 7D2 sensor, which scaled down to FF gives the 53-56MP wanted.

But still would have to be read by an external device, which is the root of all the sensor related issues. Both the image quality for still as well as video and everything DPAF related would benefit from a digital readout.

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