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Messages - Marsu42

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EOS Bodies - For Stills / Re: Auto focus BIF 6D vs. 60D
« on: Today at 03:06:42 AM »
I am consistently getting significantly sharper pictures of my resident eagles and hawks in flight with my 6D over my 60D. In all cases I am using the same 400mm f/5.6 lens. I usually shoot at f/8 and 1/1000 sec or faster.  I use the center focus point with both bodies, and use apurture priority with a typical ISO of 400.  I continue to be very pleased with the 6D in all respects, and have no complaints about its "crippled" AF capabilities.  I have never shot a 5D III or a 1DX, so I cannot compare them to my 6D.  Are my results what one would expect?

"Crippling" won't affect you if you wouldn't use the expanded capabilities in the first place, and using 6d or 60d for bif indicates you have no need for difficult multi-point tracking. The 6d af will do single point center fine for smaller apertures like your f8, potential problems only occur with fast lenses when single-point won't suffice.

That's because for these f2.8 it's no double cross-point but only has non-cross precision. You might never notice if you're focusing high-contrast objects though, but on low-contrast you can get more micro misses - at least, that's my experience, and probably the reason why most other cameras have real double-cross points.

As for your 60d, it might be a afma problem - Canon removed (yes, crippled) this option from 50d-60d and re-introduced it on the 70d. If your shots are regularly off to one side (near or far), that would be it. Otherwise at least my 60d feels snappier than my 6d, ymmv.

EOS Bodies - For Stills / Re: Whats wrong with the 70 D ?
« on: Today at 02:59:13 AM »
I dont know what "AFMA" is, if someone could enlighten me plz.

The more the time you spend on cr, the more a gearhead you become (dof, mfd, dr :-))...

... "afma" is "autofocus micro adjustment", buried in your custom settings, which adjusts the phase af to lock a bit nearer or further than it originally would. That's because with interchangeable lenses, the lens is never 100% calibrated for the camera, and that's the way to fix it.

Some see it as the magic bullet to all focusing problems, resulting in crisp and pro shots, while others don't think it's worth the hassle doing minor adjustments. It certainly matters more with faster lenses (i.e. small f numbers like 1.4) than with your ultrawide f4 zoom.

Last not least, the afma required can change vastly with the subject-camera distance, and Canon lenses can only calibrate for one, so you have to choose carefully for example with the 100L macro which can focus from a few cm to infinity (afaik the latest Sigma lenses can have multiple afma values for different distances).

Lenses / Re: Canon 6d vs 24-70mm mark ii
« on: October 31, 2014, 12:17:49 PM »
I also just saw that the 6D can Microfocus adjust on both the wide and tele end of the lens.  the 7D doesn't allow that, so that may resolve most, if not all, of my focus issues on the 24-70mk1

Might be if your lens is really dodgy, but in my experience afma misses are much more likely to be generated by varying subject distance... Sigma now has an option to account for that in their lenses, while Canon (only) has the wide/long end system that doesn't make any difference at least on my zooms.

Lenses / Re: Canon 6d vs 24-70mm mark ii
« on: October 31, 2014, 04:59:09 AM »
The Mk2 focuses extremely fast and accurately on the 6D.  Some here claim that the 6D doesn't benefit from faster lenses, but in my experience they AF faster and more accurately than f/4 and slower lenses.

That would depend on the light situation - in dim light, of course the af gets relatively better with faster lenses as it works wide open. It's just that it doesn't profit as much as it could with a real double-cross center point concerning reliability (esp. tracking) on low-contrast surfaces when *shooting* wide open.

I didn't realize that the autofocus improvements on the mark ii are limited to 5diii and 1d.

There's a lensrentals article on the 24-70L2 you might want to look up - as far as I remember, it basically states that good copies of the mk1 are as sharp as "normal" not-stellar copies of the mk2, and that only the newest 1dx/5d3 af systems can harvest the enhanced precision of the new af stepping motor. One decisive enhancement of the L2 seems to be better built quality against decentering though if your lenses take a beating in rough pj work.

Now these are no decisive reasons not to get the L2 on the 6d, but it certainly affects a decision to upgrade from the L1. As written, for these reasons some prefer to go for the Tamron with IS on the 6d.

Lenses / Re: Canon 6d vs 24-70mm mark ii
« on: October 30, 2014, 03:49:00 PM »
The 24-70mm is a great lens, but it often whiffs on focusing.  I'm amazed at how many more keepers I have with my 70-200mm and my 17-40mm.

Well, the 17-40 is a f4 lens and uwa at that, so it's not that hard to get something into focus :-p ... as others wrote, maybe you should get the lens serviced because the L1 is known for being more fragile than the L2 if it ever took a bump.

Am I fooling myself that my current 24-70mm will perform better on the 6D?

Yes, you are fooling yourself at least partly: One of the most important advances of the 24-70L2 is the more precise af motor, but *only* the 1dx/5d3 (and now probably 7d2?) can make use of it.

So basically you're paying for tech you cannot use, that's why the Tamron 24-70L might be a better combination - sharper than Canon's L1 and with IS, plus having a fast lens af doesn't really matter with the 6d anyway :-\

Due to finances, I would have to sell the body or lens to fund the new purchase.

Imho stretching your budget to get top notch glass on a crop is complete overkill, even though investment in lenses usually is the smarter choice. The f2.8 standard zooms are really designed for full frame for low light and thin depth of field - if that doesn't matter you could simply go for the f4 zoom otherwise.

You didn't write what you usually shoot, but with your L1 lens and the 6d you'll see a vast difference, while with the L2 it'll take some pixel peeping or very large prints to notice the difference.

EOS Bodies / Re: Modular DSLR Coming from Canon? [CR2]
« on: October 29, 2014, 03:01:53 PM »
We’re told that Canon will introduce a brand new DSLR model some time in 2015 that will be somewhat modular. All we were told is that the viewfinder will be interchangeable, as well as “other parts of the camera”. We’re trying to find out what else would be removable on a DSLR.

As this would be the choice between old-school optical vf and evf, I guess the other interchangeable parts simply depend on your main choice - like maybe no phase af/metering for a pure evf camera for live view / video. I don't see Canon modularizing anything else, their careful crafted lineup depends on too much giving this and that model this and that feature (or not).

EOS Bodies / Re: Patent: Canon EF 35mm f/1.4L II
« on: October 29, 2014, 02:59:15 PM »
We haven’t seen a new patent for this optical formula in quite some time.  I recently received a claim that we’ll see such a lens in Q1 of 2015, but I haven’t been able to confirm that information.

Half a year from patent public release to lens shipping - is this realistic looking at Canon's last patents and respective release dates? Or does the time simply depend on how much Canon really wants to get this patent built?

Technical Support / Re: failing shutter on 60D
« on: October 28, 2014, 05:50:26 PM »
Fixing a failing shutter can be done with a $6 part, assuming that you are able / willing to tackle the job, and, of course, that the issue is not with the shutter motor.

Oh my, why didn't anyone mention this before?! You might just have saved me €1000 for a new crop backup dslr.

* Are there any differences between the shutter blades offered on ebay (the price varies a lot), or is this just the sellers making a different amount of profit?

* Did you know how complicated it is to chance the shutter myself, any links on this? Of course I'm going to google it myself, too, but since you brought it up you might have some more insight than the first random search engine hits.

Technical Support / Re: failing shutter on 60D
« on: October 28, 2014, 04:46:29 PM »
You can continue using it at slow speeds until it finally dies.

Plus you can use it for video and with Magic Lantern for full res "silent pics" w/o moving the shutter, so if you still get into live view the 60d definitely is still good for something.

EOS Bodies - For Stills / Re: Whats wrong with the 70 D ?
« on: October 28, 2014, 04:01:19 PM »
Those recommending're not going to notice a difference in print except at high ISO. Even there you have to be printing large. Nothing against FF. It is better for really low light, it can achieve more shallow DoF, and some lenses just seem to 'fit' FF better (i.e. you want a 17mm TS lens to be 17mm). But final IQ in the vast majority of shooting situations? No difference.
As an owner of FF and crop cameras, I have to disagree. All the little improvements add up to a superior image for print and online.

As I'm also using crop (60d) and ff (6d), and not wanting to get into ff/crop discussions I just want to mention that it very much depends on the actual scene and postprocessing strength how large the difference is (if any).

This is especially apparent on fine detail like fur and feather.

I doubt anyone will argue against that in general(?), the point probably is that a crop 70d will have the edge against 5d3 ff if you put the price difference into a better lens... but if money is of no concern, go 1dx+200-400L. And hire someone to carry it for you :->

I'm in the field with a 70D now, and I can say the keeper rate is much higher than 7D.

... and, do you miss the spot af pt option from the 7d or find the  70d's af points too large? Or doesn't it matter for what you track/shoot anyway?

EOS Bodies - For Stills / Re: Whats wrong with the 70 D ?
« on: October 28, 2014, 03:29:34 PM »
the 70d does have AFMA Marsu.

I know, I meant to say that for giving back afma 60d->70d, they cut spot af 7d->70d :-p

The af points are big and that can be a problem if your trying to focus on a bird through an opening in the branches and that sort of thing.

Hmmmyes, I figured as much, how unfortunate :-\

Certain wide aperture lenses seem to confuse the af system?

Absolutely, that's why the 1dx/5d3 af system have "lens groups" and only a few very recent and select lenses support the full-blown af system with all points. As Canon puts much more time tuning their 1d cameras (and the 5d3 has the same basic af), you can then expect it to work.

With a lowly camera as the 70d, it'll be much more hit or miss as the same af system is only on the 7d which didn't exactly have a reputation for precision. The 60d had the good fortune to be based on Canon's long-running diamond 9-pt system, so inevitably they had a lot of attempts to make it work alright.

I recommend grabbing a 1dx or 5d3 manual and look at the chapter "lens groups" - if the lens your struggling with has a low/limit group, that'll be your problem. Esp. wide angle and fast lenses have a lot of distortion to the edges, so the outer points face a challenge unless the af system is tuned for this exact lens.

Lenses / Re: More EF 100-400 f/4.5-5.6L IS II Talk [CR2]
« on: October 28, 2014, 02:51:32 PM »
Availability will be at the end of the November according to one source.

Yeah, right, a few people are beta-testing some lens design now, and in one month it'll be available to the general consumer. This is flimsy, even for CR :-p ... on the other hand, no mention of *which* November :->

Technical Support / Re: 60d issues
« on: October 28, 2014, 02:25:12 PM »
AE exposure is supposed to show the (*) in the screen right?

Yes, and it does (well, on my 60d :-p)... but only until you release the button. It's much more convenient to select "AE lock (hold)" which freezes the exposure until the next shutter cycle.

Technical Support / Re: failing shutter on 60D
« on: October 28, 2014, 02:23:34 PM »
The camera has never been cleaned or lubed... I was wondering if the problem could be solved with a proper cleaning. From everything I have read, when a shutter fails, it just stops... so I am wondering if clean and lube is the solution.

My 60d shutter is about to fail at 160k cycles, I asked about the same question "What can I do" here:

Quick answer: Time to buy a new dslr as the price/cost relationship of a 60d shutter replacement isn't worth it.

EOS Bodies - For Stills / Re: Whats wrong with the 70 D ?
« on: October 28, 2014, 02:20:01 PM »
Focus issues with central focus point. Canon deny about this problem, but serviced mine and now it's better. My old 60D focus was more reliable...

Speaking of the af system - if I should ever replace my 60d with (nearly) failed shutter with a 70d, I'm worried about the 70d's af system. Now I'm really used to mediocrity as I've got the "5d2 af clone" 6d, but at least the 6d has an ok center point unless you're using fast lenses.

Question: When I tried the 70d in a shop, I felt that the af point were very large - and Canon has removed spot af on 7d->70d (thanks, Canon!). Probably the price for re-introducing afma which they've cut from the 6d :->. Is it difficult to get an af lock on small objects, like the eyes of a horse looking at directly you?

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