October 20, 2014, 07:27:47 PM

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Messages - Wildfire

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46
I use the 6D for weddings and on-location portraits and it's fantastic, especially in low-light where it shines.

It's true, capturing moving subjects is difficult with the AF, but not impossible. I have the Depth of Field Preview button set up to change the AF to AI Servo mode when I hold it down and I use that + continuous burst to get those photos where movement is a problem (bride walking down the aisle, etc). Most of the shots from such a scene are slightly out of focus, but a lot of them are still useable and there are usually 2 or 3 in perfect focus as well.

It's no 1D-series AF but I do believe it's slightly improved over the 5D2 which a lot of wedding shooters (including me) were using before the 5D3 even existed. Now that the 6D is out, and cheap, I would never recommend the 5D2... The 6D is superior in every way (except it's missing a flash PC sync port!) Oh, and don't get me started on the center AF point. I've used it to get accurate focus in situations that were so I dark I could barely see the subject. This is one of the few cameras on the planet that can focus in nothing but moonlight.

I say get the 6D and use the extra money on lenses/flashes.

47
EOS Bodies / Re: Canon EOS 70D Spec List
« on: June 27, 2013, 04:26:07 PM »
Hoping the new sensor has awesome high-ISO performance.
because APS-C are known for awesome high-ISO performance, right?

They aren't, currently. But what if the 70D changed that?

48
I think we're seeing the natural tendency of people who own a particular product to defend it's attributes, and minimize the importance of those features for which better models offer improvements.

Or perhaps we're seeing the tendency that people purchase a particular product instead of a better model that offers improvements because the improvements weren't important to them?

I don't think anyone buys a 6D when their top priority is having quick and accurate autofocus on fast-moving subjects. I've said it many times: I wish my 6D had better autofocus. But since 90% of what I photograph doesn't really move it's not important enough for me to spend extra money on.

49
EOS Bodies / Re: Canon EOS 70D Spec List
« on: June 27, 2013, 04:00:15 PM »
Hoping the new sensor has awesome high-ISO performance. Also hoping there's two card slots!

50
HDR - High Dynamic Range / Re: What's the deal with Dynamic Range???
« on: June 26, 2013, 07:20:33 PM »
It's all about lighting. If you've ever seen a behind-the-scenes photo of a movie or television set you will notice there are lights everywhere. By lighting every aspect of the set, especially the actors, they have full control over the dynamic range of the entire scene they are shooting.

51
I upgraded to the 6D from the 5D Mark II late last year. Here are my thoughts on the weaknesses of this fantastic camera:

Autofocus: I have absolutely no problem with the number or spread of AF points on the 6D. My issue is with the fact that the outer points are not cross-type or -3EV sensitive like the center point is. This means that in poor light, the outer points are unreliable. I shoot in poor light about 50% of the time, so that means half of my shooting is done with the center point only. For the times when the light is good I rely on the outer points with great success.

Not Strobe Friendly: The maximum shutter speed is 1/4000s and the flash sync speed is 1/180s. This is a downgrade from the 5D Mark II (1/8000s and 1/200s). For outdoor portraits in harsh sunlight, I like to cut down on the ambient light and replace it with flash. Having an x-sync of 1/180 makes that even harder than it already is and same for the 1/4000 when using high speed sync. Additionally, the 6D lacks a PC sync port, meaning the only way to trigger off camera flash is via the hotshoe. Good luck trying to use studio strobes and on-camera TTL at the same time.

Only One Card Slot: I shoot weddings and on-location portraits. Losing a client's images because of an SD card failure is my worst nightmare. So far no problems, but I would feel much better being able to write to two cards at once. The Nikon D600 has this feature so there's no excuse for Canon to exclude it from their equivalent camera.

Other than those things, there's really not much to hate about this camera. It is absolutely fantastic and the image quality will blow you away at any ISO.

52
EOS Bodies / Re: 6D Autofocus not impressive
« on: June 23, 2013, 05:35:27 PM »
What has been putting me off the 6D is the autofocus. I was not expecting the 5D III autofocus system but I do think that cross type points should be standard - like on the latest rebel body. 11 cross type autofocus points would have been perfect for this camera and would have quietened down the nay-sayers.

I agree with you on this, however I will say that all points work great in good light. It's only when things get darker do I start to rely on the center point only. I recently got a few 600EX-RTs and the AF assist grid really makes focusing in the dark with the outer points no problem at all now.

I believe that Canon made the decision to leave out the cross-type AF points to make room for the WiFi and GPS. Unfortunately, I don't use either of those features often so I would have preferred the superior autofocus instead.

53
Lighting / Re: Any new wireless Speedlites on the horizon?
« on: June 21, 2013, 08:42:41 PM »
There's a lot of speculation on an RT slave unit but no official word from Canon and nothing from Canon Rumors Guy either.

I would definitely love an RT slave unit but Canon sure doesn't have an incentive to release one when everyone seems happy to buy $500 units as slaves.

54
There was a Korean website that had posted a preview of the lens and in their testing they mounted this lens to a 5D Mark II. I think Sigma later had them remove the test images as it was an early preproduction copy of the lens.
Interesting

EDIT: Found it.
http://lcap.tistory.com/entry/Sigma-1835mm-f18-RT-Review

55
Lighting / Re: 430EX II for £155 delivered (after rebate)
« on: June 21, 2013, 06:25:41 PM »
Is it true that, you can not use AF Assist light on Manual, Av, Tv mode? (using 430ex ii)

That is false. The AF assist grid works great in all modes unless disabled via a custom function.

56
So this lens is designed for crop, I get that, but what happens if it is mounted on a full frame camera?  Sorry if that is a dumb question.

There was a Korean website that had posted a preview of the lens and in their testing they mounted this lens to a 5D Mark II. I think Sigma later had them remove the test images as it was an early preproduction copy of the lens.

However, the test pics showed that it worked at all focal lengths. There were black edges around the frame at any focal length wider than 35mm. Essentially this lens makes a 35mm f/1.8 prime for full frame that happens to be zoom on crop! :D

57
So I guess we can all agree that a 28-55 f/1.8 with a design similar to Sigma's 18-35 f/1.8 would be big, heavy, and expensive.  ;)

However, I still believe a full frame faster-than-2.8 zoom is possible with some additional compromises in aperture and focal range. Maybe with an all new design (external zoom instead?), something like a 28-50 f/2 or 35-85 f/2 lens could be possible. Or even a variable aperture 24-70 f/1.8-2.8 lens.

58
Really???  Wow!  I want an FF equivalent (with constant F1.8 aperture, not F2.8) at sub-1K.  Hopefully it's possible.

Most likely not, if this were stretched to full frame coverage it would be 2.8 due to light magnification and such like, so unfortunately this is just a full frame 2.8 zoom with a smaller image circle

What? That doesn't make any sense.

This is not a f/2.8 zoom, it's f/1.8, regardless of which body it's mounted to. Someone has already mounted this lens to a 5D2 and the images exposed at f/1.8 like all other f/1.8 lenses (of course, there was heavy vignetting around the edges because of the smaller image circle).

If they kept the design the same and scaled it up it would be a 1.8 zoom for full frame... the problem is that it would most likely be too large and heavy after being scaled up to fit a FF image circle.
To get FF coverage from this design of lens (throughout the zoom range without vignetting or possibly painfully soft corners), you'd need to fit a mythical 1.6x TC to it. That same quantity of light from the small projection of a crop sensor is spread a bit dimmer over a larger area. So with a 1.6x conversion, you multiply focal length and aperture by 1.6, and you get a 29-56/2.88 FF lens.

If the 'same quantity of light from the small projection of a crop sensor is spread a bit dimmer over a larger area' is confusing, imagine a projector with a zoom option - due to compression, a small image is brighter than a large image, yet both have the same quantity of light.

And yes, the FF sensor with a slower lens will need a higher ISO to get the same exposure.

Well that's not an FF equivalent to a 18-35 f/1.8, that's a 18-35 f/1.8 mounted to a teleconverter.

If you scale the design of the lens up by a factor of 1.6, then you'll have a 28-55 f/1.8 lens for full frame, which is what we want. The question is whether or not such a lens would be reasonable in size, weight, and price.

EDIT: I suppose we could try to calculate the answer to that question by scaling the size, weight, and price up by a factor of 1.6 as well. In which case, our full frame 28-55 f/1.8 zoom lens would be 125mm diameter x 194mm length, and weigh 1296g, and cost $1280. That's larger in diameter, nearly equal in length, and slightly less weight than a Canon 70-200 f2.8 IS II.

I'm guessing that rather than simply upscaling the design and leaving it completely unchanged, Sigma would want to modify this new full frame lens design to be more efficient, increasing the cost but reducing the size and weight. Would the size/weight reduction be significant enough? Would the cost increase be too high? Perhaps Sigma engineers have already answered these questions with prototype lenses.

59
Lenses / Re: Help complete my bundle...
« on: June 20, 2013, 07:12:14 PM »
I was under the assumption that FF gave better IQ than crop. So even with the new 70D on the horizon wouldn't the 6D be a better choice?

Is the 6D's auto focus as really bad as everyone says?

The 6D's autofocus isn't bad, it's just less effective than some other AF systems out there.

It has 11 autofocus points and they all work great in good light. In low light, the center point (which is more sensitive) will catch focus in situations that would leave any other AF system hunting.

60
Really???  Wow!  I want an FF equivalent (with constant F1.8 aperture, not F2.8) at sub-1K.  Hopefully it's possible.

Most likely not, if this were stretched to full frame coverage it would be 2.8 due to light magnification and such like, so unfortunately this is just a full frame 2.8 zoom with a smaller image circle

What? That doesn't make any sense.

This is not a f/2.8 zoom, it's f/1.8, regardless of which body it's mounted to. Someone has already mounted this lens to a 5D2 and the images exposed at f/1.8 like all other f/1.8 lenses (of course, there was heavy vignetting around the edges because of the smaller image circle).

If they kept the design the same and scaled it up it would be a 1.8 zoom for full frame... the problem is that it would most likely be too large and heavy after being scaled up to fit a FF image circle.

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