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Messages - Lawliet

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166
EOS Bodies - For Stills / Re: dpreview: 70D Dual Pixel PDAF review
« on: October 12, 2013, 05:59:29 PM »
What can you do with dual pixels that you cannot do with LV AF, say, on the 60D?
For stills: Having less shot ruined by minor but noticeable focus errors in scenarios with life models.

167
Lighting / Re: Studio lighting
« on: October 11, 2013, 07:48:24 AM »
profoto pro b4

Unless you want cont. modeling lights on both channels, that would deplete the battery even with the charger attached. In studio I'd rather consider a D4, unless the speed of the Pro8 is required.

168
Lighting / Re: Studio lighting
« on: October 11, 2013, 06:45:24 AM »
was thinking Profoto strobes or possibly Kino Flo led banks or a mixture of both. I shoot mainly portrait/headshots and fashion.
Remember that KinoFlo banks are made to provide illumination for quite high sensitivities and a shutter speed of mostly  1/60s. And then there is flexibility, you can't simply change their size or attach a reflector for hard light instead of a softbox. Unless you'll need them for video anyway or have an WYSIWYG fetish they are the wrong tool.

The D1s are quite good&Air is really convenient, together with availability and rental options a good choice.
Multiblitz has the X system, worth a look. On the budget conscious side Elinchroms Style RX leave little to desire.
Or are you more into head&pack? Its hard to find something better then broncolors scoro S. 8)

169
EOS Bodies - For Stills / Re: dpreview: 70D Dual Pixel PDAF review
« on: October 11, 2013, 12:11:40 AM »
After all they need something to improve in the next generation or during the transition to EVF.
But even in this implementation it would be great for a big MP studio camera - what would be the point of resolving an OOF image to the highest degree?

170
Speedlites, Printers, Accessories / Re: New Canon Speedlites and ST-E3!
« on: October 10, 2013, 11:34:22 PM »


Interesting. This is from the Move 1200L manual. I am sure Broncolor themselves are wrong.
Not wrong, just assuming people are capable of reading the right column. Try the one relevant for shooting outdoors/in mixed light.
Quote
I wasn't espousing the benefits, advantages or disadvantages of HSS, I was pointing out the limitations of leaf shutters in the context of a Canon Speedlites and ST-E3--RT thread.
In a fatally flawed way...the limitation, based on SK's leaf shutter, costs about 1.5 stops of required power reduction but gains 5 stops via shutter speed - unless you're deliberately doing it wrong you increase the relative power tenfold. That's about the kind of limitation I'd like to see in every field.

171
Speedlites, Printers, Accessories / Re: New Canon Speedlites and ST-E3!
« on: October 10, 2013, 10:35:07 PM »
I well understand the practical application of IGBT circuitry.

Here is a test of three 600EX-RT's at 1/8000 sec at f8 with the brightest Florida sun in the frame and underexposed by about 5 stops.
leaf shutters reach  1/1600 tops, the Fuji 1/4000...1/8000 is...interesting, you must be using a truly ancient 1D  :o
Quote

At 1/8000 sec your $6,000 Broncolor is outputting 5-8 Ws.
You're just an order of magnitude off. That alone is more then 3 stops error, not to account for the additional two stops penalty for HSS mode on a flashgun. About f/32@2m(GN 64) with a 50┬░reflector.
Or 30-40 600EX to do the same job a single Move does, just at vastly different recycle times and battery capacity. So much for the viability of HSS.???

172
Speedlites, Printers, Accessories / Re: New Canon Speedlites and ST-E3!
« on: October 10, 2013, 09:31:06 PM »
That might be a point if they'd behave differently.
Remember why flashguns are so popular with anything highspeed related? Because their t0,1 drops fast as you cut power a bit. Just because the ambient/flash ratio curve has a local minimum you can't assume that that this is the best possible use case.

173
Speedlites, Printers, Accessories / Re: New Canon Speedlites and ST-E3!
« on: October 10, 2013, 04:57:02 PM »
That hasn't put anything in perspective. What flash are you using? What is your flash power and setting to give you a t.1 of 1/2200 because it isn't close to a "normal" flash at anything like full power, that would make your 10m distance as useful as a cigarette lighter.

A Move 1200L, at 300Ws set for fast flash duration while maintaining constant color temp. Industry standard.
Ganging up the 600EX in my bag at that t0,1 would net me about 400Ws, although w/o proper mounting one had to rely on their built in focus. The important part: With IGBT controlled flash the flash duration drops faster then the power emitted. Half the power allows for about 2 stops faster shutter speed, while HSS wastes more power then the changed exposure settings would net.

174
Speedlites, Printers, Accessories / Re: New Canon Speedlites and ST-E3!
« on: October 10, 2013, 03:59:53 PM »
To put this into perspective: if I use a SK lens wide open, about the DOF of f/2 on small frame, and position my light about 10m from the model, I still get a t0.1 of 1/2200s - a decent margin faster then the 1/1600 of the shutter.
Lets pretend I use a more efficient LST or get closer to say 5m then we're at shorter then 1/4000, again t0.1.
Doesn't sound that unworkable, does it?
(NB: Nevada desert, or the Negev/Dead Sea as daytime locations)

175
Speedlites, Printers, Accessories / Re: ST-E3 Overheating?
« on: October 10, 2013, 03:04:54 AM »
Unlikely since it's just a RF transmitter.
The only RF transceiver with a back channel to date. The flashes report their state to the controller, telling you whether a hidden flash is ready. If one overheats it at least wouldn't allow the "ready"-light to come back on, probably locking all strobes.

176
Speedlites, Printers, Accessories / Re: New Canon Speedlites and ST-E3!
« on: October 10, 2013, 02:56:02 AM »
Exactly. The Fuji would be an example, although my mind was at the other end of the price spectrum, MF+leaf shutter...but that doesn't matter. :)

177
EOS Bodies / Re: EOS 7D Mark II Talk [CR1]
« on: October 10, 2013, 02:50:19 AM »
Or does having different pixel sizes on the same sensor simply not work for whatever reason?
You'd need an AA-filter with adjustable strength. Possible, but has Canon the proper patents?
And then pattern noise and assorted nastiness with the on sensor wiring come up.

Better bet: do it like the 70D for AF, read multiple subsensels together. Instead of just the AF-parts combine 18 elements from 9 AF capable sensels a 22+ MP sensor would have for fHD video. Less noise-both from the area as well as statistical cancellation of readout noise, the latter being Canons weak spot atm-, and with the right interweaving reduced moire.

178
Speedlites, Printers, Accessories / Re: New Canon Speedlites and ST-E3!
« on: September 28, 2013, 03:28:59 AM »
I would never need to bring cumbersome strobes out of the studio again

You want a faster/no mechanical shutter. Cut the ambient light instead of adding more power to balance ageinst it.

179
Canon General / Re: Patent: EF 24-70 f/2.8L IS
« on: September 26, 2013, 02:44:52 AM »
Are there any comparable product names I can search for on ebay except "cinefoil"?

You get the same thing in shorter lengths as "photofoil". ;)
Or from Lee as filter number 280, blackwrap, cinewrap.
Normally about 25USD for a 24"*25'(~60cm*8m) roll.

180
Canon General / Re: Patent: EF 24-70 f/2.8L IS
« on: September 25, 2013, 02:03:17 PM »
This is about what it'll be :-o though I'd like some waterproof plastic and I prefer black to make it look more impressive :-p

Get Cinefoil - matte black all metal construction, heat and water resistant, highly customizable and a product recognized&valued all over the industry.

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