April 20, 2014, 08:04:42 AM

Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.

Messages - 3kramd5

Pages: [1] 2 3 ... 14

Can someone please explain dumb me what does focus at "-3ev" actually mean? Thanking in advance.

Exposure values were initially used to merely compare exposure settings, and settings independent of film speed. EV0 was defined as 1sec at f/1. In this context, it is assumed to be at 100ISO (ISO100, aka light value). EV0 light would require f/1 at 100 for 1 second or equivalent to properly expose. EV-3 is three stops darker, or f/1 at 100 for 8 seconds, or f/0.7 at 200 for 2 seconds, etc. In other words, it's dark.

Animal Kingdom / Re: BIRD IN FLIGHT ONLY -- share your BIF photos here
« on: April 19, 2014, 06:00:08 PM »
Immature Rufous Hummingbird from Monday.


Here's my only recent BIF (teehee):

Additionally, he adds in that the 1Dx and 5D3 would have never AF'd in a particular situation that the 6D did.  He also makes the accusation that we've never shot with the 6D so how can we comment?

1.  The 1Dx and 5D3 would have easily AF'd in that case, so that point right there is simply objectively WRONG.
2.  He hasn't shot with the 1Dx or 5D3, yet makes the above comment.  Talk about the pot calling the kettle black. 

Is he for real?  There's NO WAY any sane person could both make the arguments he's making and simultaneously believe in those arguments.

The AF system of the 1Dx is best = $6799
The AF system of the 5D3 is second best = $3399
The AF system of the 6D is the "least good" out of all 3 = $2000 ish

Hmm, surprising!

It's just silliness. The 6D is a nice, affordable 135 format DSLR. It has some nice features, but AF is hardly its selling point. -3LV autofocus, as has been pointed out, has some significant practicality issues.

ken rockwell says the 6d af is better than the 5diii which is too complicated. the 6d af doesn't get in the way, it just works baby!

After all, you can AF at LV-3 with the center point, then recompose on your tripod, and get a nice, steady image of an OOF subject. Can't possibly do that with a 5D.

the focus plane is the same in every picture at F 1,4

Bold statement implying that the only way to focus a prime f/1.4 lens is to move it (which is demonstrably false). Again, what is the explanation for how AF f/>2.8 images were achieved using canon bodies? Did the camera stop down to focus?

show proof that I am wrong,  the AF  measurement angle accuracy in Canons AF is  F-2,8
I know Im right
it will be interesting!!!!

So you're suggesting that the sensor pair is too narrow to see beams from lenses wider than f/2.8? If that's the case, how do you believe any number of images online shot using canon AF at apertures in the f/<2.8 range were focused? Does the camera actually stop down to focus (as opposed to the normal practice of focusing wide open)?

Its not really comparing apples with oranges because the Eg-S allows you to see in the viewfinder more accurate DOF - even when autofocusing - than the 5D3's stock screen which is not user replaceable.  5D3's fixed focus screen only shows about f/2.8 DOF while the Eg-S on the 6D will come close to the DOF of f/1.2.

So, the fact that the 6D allows the user to swap to Eg-S means that what you see in the viewfinder when both AF *and* MF will more accurately represent the end product.  If you do choose to MF to that end product, it is worlds easier on the 6D using Eg-S vs the 5D3's fixed screen.

Yes, the 5D3 will likely allow to set up your shots faster, but that does not make the 6D AF useless.

Indeed. The lack of replaceable focus screens is one of the annoyances of the 5D3 (cost being the primary annoyance). I can live with it, however. When I have the luxury of setting up my shot, I generally manually focus with live view.

I don't think anyone has said the 6D AF is useless. Thousands of photographers have used it for years with the 5D2 (no, they aren't identical, but for all intents and purposes one uses them the same way).

No, it's not useless. But it isn't even remotely like the 1Dx unit, or the almost 1Dx unit in the 5D3. Even in one-shot (which I use exclusively with my 5D2 and much of the time with my 5D3), having reasonably accurate points covering about 2/3 of the width of the frame allows for thin DOF AF with a much higher hit rate. And when you consider tracking, it's apples and paperclips.

I feel like the back button focusing isn't as reliable -or maybe I'm doing it wrong. Are you supposed to be holding the backbutton(what I've been doing) or just press it once? I'm shooting in AI Servo.

It's exactly as reliable. Whether you engage AF with the shutter release or the AF-ON button, what follows is identical.

If you're in Servo, you're doing it right: hold it down, including when you release the shutter.


The lateral points are vertical line sensors, meaning they detect horizontal lines

Ah yes, pardon the brain fart.

I thought you were discussing side AF points.  Those eyes look pretty centered in the FOV to me, unless this is heavily cropped...which I doubt.

Did you read the description? There is no crop. Her right eye is near the center of the frame, and because she is nearly parallel to the sensor plane it is in focus. But AF was on her left eye.

"1st photo SOOC, untouch: 5D III + 85L II, 1/160 @ f1.2, outer AF point, was focus on her left eye"

I get that kind of performance from my 5D3 outer cross-type points too (in one shot, I disable non-cross type AF), at least as best I can tell with shallow DOF from say 200mm/2.8.

5D2? Not so much. The 6D outer points are vertical line sensors like the 5D2, right? In landscape orientation it will just hunt on the outlying points if there is no vertical contrast. The 1Dx unit is sensitive in two directions widely across the frame. That's a significant improvement over the 5D2/6D.

I don't know of anyone who wanted a 5D3 at 6D prices.  Rather, I suspect there are plenty who would pay $4500 for a 5D3. 

Willingness to pay and a desire to pay are two different things. I certainly would have wanted a 5D3 at 6D prices. However, that's unrealistic.

As for there being plenty who would pay $4,500... I don't know. There may be some, but at that point, many may look elsewhere or decide to save a little bit more for the 1Dx.

EOS Bodies / Re: Canon 5D MarkIII & 1Dx - 1080p/60fps???
« on: April 14, 2014, 02:34:07 PM »
the 5diii was a very small improvement (leaving AF aside) over the 5dii.

Sorry, i find that exceedingly funny. Leaving aside the paramount major upgrade, it's a small improvement. That's like complaining that setting aside the hybrid engine, the hybrid version of a car is a minor upgrade over the gas one.

Speedlites, Printers, Accessories / Re: Speedlite Tutorials?
« on: April 13, 2014, 05:53:05 PM »
This is CR forum at its best. I'm learning slot from this thread being a light beginner also.

I agree.  So here is my first example:

I know the composition is awful and the background is fussy (but the subject is somewhat dear to me).  I used the 24-70mm in Av mode (with the Camera set to keep the shutter between 1/60 and 1/200) and had the flash in simple ETTL mode, mounted on the camera and pointed straight ahead - i.e. in simple mode!  I'm pretty happy with the result - it has had no post-processing beyond that which Aperture does on import.

Excellent, you are not being pushed into running and stumbling before you are happy walking :-) , as I said earlier camera in Av and flash in ETTL really is how this stuff is best used initially.

I think shooting the flash in manual will flatten the learning curve. With camera AE and automatic flash power, it's very difficult to know why any given image looks a certain way.

If you look here:


it looks like this lens is sharpest around 5.6.  I wouldn't go above F8 unless you really needed the additional DOF.

Good Luck

My 135L is sharpest at F5.0 as per Focal Pro. Is your lens AFMA'd to the body?

For fun you could always try walking up the sync speed too -  it is a function of the camera max sync which was talked about earlier along with the trigger max sync. The worst thing that can happen is you will start to see the banding of the shutter creep into the shot - from there back it off a 1/3 of a stop or so.

I've never had any issues at 1/200s with the 5DIII, so that could help, too.

+1. I shoot my mk3 at 1/200 triggering wirelessly.

I agree with the misfocused theory. It doesn't look like motion blur, it looks like slight back focusing.

EOS Bodies / Re: Canon EOS sensors, and technology
« on: April 09, 2014, 01:54:06 PM »
Otherwise more distant future.....I think it maybe a mix of how the Lytro can focus

Doesn't the lytro "focus" mathematically? If you're happy with light field algorithms, why not deconvolving AA filtered images?

"Here is a sample conversation, or reply to my original post... [/snip]"

But your original post comes across as very self-centered and demanding. While that may not have been your intent, it is not inviting of the type of reply you suggest. Rather, people will by and large either move along, or they will argue. And later on, you merely dug yourself a hole by triumphantly citing a non-applicable source.

Sure, it's fun to have a list of dream features. Maybe all I care about is superb OOF rendering, so why not muster my best Arnold accent to demand that canon produce 300mm f/0.7 fixed (round) aperture lenses? Paired with my 58MP 8 color-per-pixel 64-bit sensor, I'm going to get rainbow bokeh like the world has never seen! DO IT NOW!

But really, it seems kinda silly to hope that one company introduces a niche product when there are other companies already serving that niche. Would it be nice to not have to use system 1 for one purpose and system 2 for another? Yah. But is that economically realistic? Not really.  Canon serves a mass market. If they offered a camera without AA filtering, likely many people would unknowingly buy them, and a big upwelling of "my new canon has weird distortion" would ensue online. Nikon has a smaller market and may be less susceptible to people inadvertently purchasing the "E." Sony is frantically trying to get into any market it can. Canon tends to play it safe. Some sports cars allow drivers to disable traction control systems, but I don't think we'd see Hyundai doing that any time soon.

PowerShot / Re: Canon EOS Smart 1 Phone - April Fools Joke? :)
« on: March 31, 2014, 10:37:08 AM »
funny stuff.

EOS Bodies / Re: EOS-1D X, Dual Back Button AF
« on: March 24, 2014, 03:04:18 PM »
On the 5D3, the DOF preview button is where my right pinky sits naturally, so that works for me. I just wish it were a persistent toggle. It only switches modes while being depressed. It would be far better IMO to have it switch once per press, or alternately to cycle through C modes with that button rather than the dial.

Pages: [1] 2 3 ... 14