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Messages - Zv

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EOS Bodies / Re: EOS M2 Coming to North America & Europe?
« on: February 28, 2014, 10:22:22 AM »
Read the interview and also the link to the technical AF question, answered by Chuck Westfall. This blew my mind a bit. Thought I'd share it.

"On the other hand, because AF precision is proportional to maximum aperture with Dual Pixel CMOS AF, it scales itself automatically and dynamically according to the supported EF or EF-S lens in use. For example, Dual Pixel CMOS AF achieves a longer baseline for AF precision with an f/4 lens compared to an f/5.6 lens, and so on all the way down the line to f/1.0. At the other end of the scale, Dual Pixel CMOS AF supports autofocusing with maximum apertures as small as f/11, a full two stops smaller than is possible with the 70D's TTL-SIR-AF system. And because the AF data is measured directly from the imaging sensor, there is no need for AF Microadjustment."

I kinda want to try a 70D out for the day.

EOS Bodies / Re: Full Frame Vs Crop Sensor
« on: February 27, 2014, 08:02:00 AM »
I don't begrudge people the whole field of view argument with crop v. full because a 50mm is indeed like an 85mm... and I'm not sure why, but with full frame, depth of field is greater, though with comparable framing, the full frame's depth of field is thinner...

I've heard the argument about the f/2.8 is comparable to f/4.5 (or whatever), but I didn't bother to ask what they meant.

So if I'm shooting with a 135L f/2 in moderate light and at iso 800 I'm shooting at 1/2000 of a second... that should still be the same achieved shutter speed regardless of crop or full.

And if you keep the same distance between, the depth of field should be comparable.  So why is f/1.4 now f/2.2?

Ok, but I choose quality over quantity. I don't need to "cover the range" and it is only one L lens less for FF, really. What you'd get from your list on APSC is:
Tokina 18-26/4.5
Canon 38-112/4.5
Sigma 56/2.2
Canon 80/2.2
A 160/4.5 IS
A 216/3.5
A 112-320/6.3 IS

If the light is constant and you compare an image from a crop sensor and FF. both shot in M mode, at the same aperture and SS you'll notice the FF image to be brighter. I think it's like 2/3 of a stop. Could be more. However, in Av mode both cameras should spit out the same as the camera adjusts the SS accordingly. I did this experiment with my 5D2 and 7D. The FF gathers more light. So in low light it does make a difference. In bright sunlight that wouldn't be an issue as your SS can be whatever.

What I also like about FF is that f/4 is now a quite shallow dof at 50mm and above. The slow zooms that I had on my 7D become a lot more useful.

Separate argument about the upgrade path - I agree that FF needs good lenses and if someone asked me to upgrade lens or body first I'd say lens. However, if someone already owns decent primes I think they'll benefit more from going t2i - 5D3 rather than change the already good prime to L prime.

I wish I had just bought a 5D2 + 24-105L from day one tbh. All beginner advice be dammed. I just ended up at the same place 3 yrs later anyway and slightly poorer having sold off cameras at a loss. My advice to myself would have been buy the best camera you can afford that will last you at least 5 yrs then build up your lens collection.

What I don't get is the contradiction between those who claim IQ is their no1 priority and have the best L lenses, because they were told lenses are more important than camera and are using only a crop sensor body with those L lenses. Obviously not counting sports shooters and other people who have reason to (in which case IQ is not their priority anymore it's making money!). I'm talking the rebel t1i with 200mm f/2.


Sorry, I may have been wrong. Never mind. I'll edit the post. Today I learned .....

EOS Bodies / Re: Full Frame Vs Crop Sensor
« on: February 27, 2014, 12:39:40 AM »

If the light is constant and you compare an image from a crop sensor and FF. both shot in M mode, at the same aperture and SS you'll notice the FF image to be brighter. I think it's like 2/3 of a stop. Could be more. However, in Av mode both cameras should spit out the same as the camera adjusts the SS accordingly. I did this experiment with my 5D2 and 7D. The FF gathers more light. So in low light it does make a difference. In bright sunlight that wouldn't be an issue as your SS can be whatever.

Only if your camera is faulty, exposure has nothing to do with sensor size. Absolutely nothing.

I see. Could it be due to the larger pixels then?

Edit - I am talking like a crazy person, please ignore my stupidity.

EOS Bodies / Re: Full Frame Vs Crop Sensor
« on: February 25, 2014, 07:03:04 PM »

Nice glass shame about the body! Did you just forget to upgrade your camera when you were acquiring your L lens collection??


The philosophy down here is buy better glass before upgrading the body.

Roger Machin, head of Canon South Africa gave me that advise.

Finding the right camera is just as important as having a great lens to go with it. Cheap camera great lens is just the better of the two other situations. I agree better glass is important but after a while it just becomes silly when you are prepared to lay down 2k for a top of the line L lens and ignore what it's attached to.

It's like you bought the Armani suit but are still rockin the old New Balance trainers to go with it!

EOS Bodies / Re: Full Frame Vs Crop Sensor
« on: February 25, 2014, 08:44:12 AM »
Hi everybody  :)

So as I move into my 3rd year of photography, I find my 500D isn't able to help my take my photography to the next level and its beginning to feel like my L series lenses are begging to shoot on a full frame body.

I've never had the chance to shoot full frame so most of what I know is pure theory derived from reading reviews etc online.

With South Africa's economy in a bit of trouble, I can get a hardly used 5D mkii for a reasonable price so I'm considering taking that.

Just what can I expect in terms of image quality and noise performance? Is the IQ of a full frame substantially better than a crops? Will I be able to take relatively noise free images at say ISO 3200?

The reviews seem to indicate that the native system for L series glass is full frame. Does this mean that I will experience a dramatic improvement in IQ?

The more I read, it seems that crop bodies have a singular advantage over full frame and that is the increase in focal length.

Can you guys chip in and throw some opinions and facts my way please?

Thanks in advance everybody.

You will love full frame cameras, but you won't like how much the lenses cost.

There are some value ef lenses... but if you get a nice body, it is just a waste to put on mediocre lenses. 

Even then... if you just go with primes like the 40mm, 35 f2 is, 100 f2... you can get by.

Sure, but you'll want to add at least one pricey one.

lol. I do have some pricy (for me) lenses.

Canon 100mm macro L, Canon 400mm f/5.6 L, Canon 70-200 f/4.0 L, Canon 24-70mm f/2.8 L mkii.
Then also have the EF-S 10-22 & 50 f/1.8.

Nice glass shame about the body! Did you just forget to upgrade your camera when you were acquiring your L lens collection??


Take the argument to the extreme and consider something like and iphone 5s. It has a tiny sensor so everything is always in focus. But it still has an f2 lens in terms of light transition. So sometimes I can get a better macro shot in low light on my 5s than I could on my 5d mk iii. Because to get an equivalent depth of field I'd have to stop down to f18 which would push up the ISO to extreme.

I think you have to factor in the difference in sensor size and light gathering capabilities of both. I don't know the exact factor but I would say that the FF sensor would gather a lot more light than the iPhone sensor at the exact same exposure settings. Well that part is obvious but then you see, when you stop the FF / lens aperture down a few stops to match the amount of light you have essentially "bought" yourself a few stops of ISO too. Then another feature of the FF is that even at ultra high ISO it will be relatively noise free and have more detail.

I've never tried macro with an iPhone using only ambient light. I'd imagine you'd need a lot of light. It would be interesting to see a side by side comparison with a 5D3.

EOS Bodies / Re: Full Frame Vs Crop Sensor
« on: February 24, 2014, 08:41:41 AM »
What you see on the LCD is the JPEG preview anyway, regardless of what file type you shoot. Therefore you could argue that you are always shooting JPEG in a sense. We should always try and get it right in camera and one way to do that is to use the info from the histogram and LCD. Though it's bloody hard on a 3" screen and usually things look fine until you look at it on the big screen!

As Neuro said there is no real benefit to the photographer by limiting the file type. You might as well shoot RAW, get it right in camera and then just convert to JPEG if required. You always have the option of not processing the image.

That said I think the challenge is interesting in a way. I think I'd spend more time composing my shots and getting the light just perfect rather than getting it close enough. Could be useful someday if a client wants images on demand during a shoot. I prob rely too heavily on fixing it later. The thought of handing over unprocessed shots makes me very uncomfortable!

EOS Bodies / Re: Canon DSLR Announcement in March? [CR1]
« on: February 23, 2014, 01:46:25 AM »
I think one of the problems with Canon's DSLR lineup is that they have too many models on the market. It is not really economical to support future development of all of them.

I've been saying that for a long time.  Ignoring the mirrorless segment for the moment, the right number of DSLR models is 4:

  • Consumer crop-body DSLR (based on the 70D)
  • Pro crop-body DSLR (7DMk2)
  • Consumer full-frame DSLR (6D)
  • Pro full-frame DSLR (1D-???)

I could possibly accept 5, but only if it's because they continue to sell one older model of consumer crop-body cameras to hit a price point.  Any more models than that, and your products are cannibalizing each other's market share way too badly.

What this means is that they need to merge the 1D and 5D lines and price them where the 5D line is currently.  They also need to kill the Rebel line and rebrand the 70D as the Rebel T6i.  There really is no good reason to have two consumer crop body lines that are barely differentiated, much less two professional full-frame body lines that each have some features and not others.

Also, the high-end model should always be a strict superset of the low-end model.  Having features in the 6D and 70D that the 7D, 5D, and 1D don't have is absurd.

Hmmmm .... I disagree with what you said about 2 FF bodies. The current system is pretty good in my opinion. One low cost, one mid level and one high end. By merging the 1D and 5D I presume the body would be 1D shape? That would annoy a lot of journalists and wedding togs for sure. The 5D range is the bread and butter for a lot of folk. The 6D is targeted for a different kind of photographer. It seems more travel and casual stuff. Maybe first time FF buyers etc. also a one camera does it all top end model would be very pricey. The jump between 6D and 1D is really high.

Lenses / Re: Affected with GAS, Gear Acquisition Syndrome
« on: February 22, 2014, 04:17:34 AM »
I need help! Spring is in the air and I am coming down with GAS, I am spending to much time looking at lens reviews....how can I rid myself of this affliction?..? ;) ;)

Good. The first step is admitting to yourself that you have GAS.

The next step is to give in to it and let it take over your life. Resistance is futile!


Enjoy your rapidly depleting bank account balance!!

Regardless of Matt's errors at least we get to see the lens in comparison to the 35 1.4 which is what I was wondering. It gives me an idea of how it will look on a 5D.

Why is it in black and white though??

Sigma 50 1.4 815 grams official weight. My 24-105 Sigma is heavy as well but worth every gram.

We're getting to the point that equipment size and weight is increasing so much that practicality is at stake. More bulk means less space remains in the bag for other lenses. It's good to limit the stuff you carry but can be good to have a little extra space for contingency lenses. This is why I keep the old 35 f/2 and 50 f/1.8 which sacrifice a little in image quality but are very compact which is great especially for travel. note that I always limit myself to the minimum I think I will need, and my lowepro minitrekker AW is the measure for the maximum volume I want to carry.

So it weighs about as much as the 24-70 f/2.8LII (805g). That's a lot for a 50 prime. I like my primes small and light. I think Sigma are just going all out here to create the best lens they can optically. Weight be damned. The old Sig 50 has a nice weight and balances well. I'm hoping Canon makes their new 50 compact like the 24/28/35s. You can chuck all three of those in a small backpack and still have plenty of room for your lunch! We togs gotta eat on the go!

EOS Bodies / Re: Canon DSLR Announcement in March? [CR1]
« on: February 20, 2014, 09:59:19 AM »
Where I live a 70D body costs about $1250. On initial release a Rebel Txi usually costs around $1100 with its crappy kit lens (they cost a lot less at the moment, but that is because the T5i is relatively old now). If what you say is correct, and they released a T6i with marginal improvements over the T5i, then it is going to have a tough time competing with the 70D. Who in their right mind would buy a T6i when for a little bit more they could get a much better camera in the 70D? I think one of the problems with Canon's DSLR lineup is that they have too many models on the market. It is not really economical to support future development of all of them.

It is much simpler for Canon to reduce the price of the 70D one or two hundred dollars than it is to start producing a new camera.

So what you're saying is Canon should cut the price of the 70D by about $200 or more and not release a new T6i?

Great. Now they're selling the 70D close to break even thus losing profit and to top it off they have no income at all from what used to be a best seller.

Development costs for their rebel line are quite low. You said yourself "... with marginal improvements". How much development do you think is going on in these rebels?! The developing has already been done. The cameras use tech filtered down from the older high end models. A little spit and polish, add a few new creative filters and increase the model number accordingly and voila! A T6i is born! Sit back and enjoy as profits go up!

People will buy it simply because it's newer. Others will wait until the price drops. Either way it will sell.

EOS Bodies / Re: Canon DSLR Announcement in March? [CR1]
« on: February 20, 2014, 02:23:35 AM »
Yes, it's likely that the next camera is launched T6i. I just hope it has the same sensor 70D.

Canon is shrewd when it comes to milking profits from sensors.  Consider that the T5i/700D did not get the latest version of the 18 MP APS-C sensor.  The T5i's sensor has Hybrid CMOS AF (same sensor as the T4i and the EOS M), whereas the sensor used in the SL1/100D and the EOS M2 has Hybrid CMOS II AF (where the phase AF area covers 80% of the frame vs. just the central portion).  That allows Canon to release another T#i-series body with a 'new' (to the line) sensor (but not the 70D's sensor).  Put Digic 6 in there, and they're good to go with the T6i/750D.

I doubt it. A 70D body already costs barely more than the current rebel when it is released. What is more likely to happen is that the rebel line will not be updated and the 70D will take that place in the lineup, since it is about the same price point. The top end APS-C will be taken by the new 7D2 (or whatever they call it), and will probably have advanced video features that would allow it to compete in the same space as the GH4. The last of the three speculated DSLRs would then be a full frame camera, replacing either the 6D or 5D3 (probably they would do the 6D first). Full frame cameras have not been updated for some time and are due, if they are to remain competitive.

Canon is in the business of making money, they need their revenue stream flowing and the way to do that is to convince people that it is time to update their bodies. An iterative update will not cut it in that regard, so we can expect something substantial in higher end cameras. Since they have already said that they are going to be focussing on video, what will probably happen are a set of new cameras will incremental upgrades in still capabilities and large upgrades in video capabilities. That is where the growth potential is, and (unless they are stupid) they will capitalize on the current interest in 4K and high quality output to drive that process. While the average Joe might not care about 4K and video quality, the target group that buys their high end cameras most certainly is.

So, at the low end the new Rebel T5 will provide good quality stills for the average Joe (who doesn't care that much about video quality). The 70D will fill the spot in the lineup previously occupied by the Rebel Txi series, with a price drop of 200-300 dollars to get it in the sweet spot. The high end of the consumer market will be targeted by the 7D2 which will have excellent APS-C stills capability and high quality camcorder like capabilities for 1080p video. The prosumer market will be targeted by something like a 6D2/5D4 which will provide excellent full frame stills and high quality 4K capabilities (similar to the GH4). That way they could revamp the entire line and provide something for each of the four main market segments to drive growth.

At the professional level they introduce the new cinema EOS models to address the dedicated film makers. There will be a high end model (8-10K range) for the real professionals, and a lower end model (3-4K range) for the wannabe amateurs.

In addition, in the camcorder segment there will be new 4K camcorders, a semi professional model similar to the HA 20/25 and a consumer model similar to the Vixia HFG30. One or two professional big bucks camcorders will be introduced to address that market segment as well.

If they do this over the course of the next 9-12 months they will revamp pretty much every market segment and keep them competitive, particularly with respect to the changes that video is currently undergoing.

That is my prediction of what will happen.

Where does the SL1 fit into this model?

I don't know about you but the 70D is way more expensive than any rebel I've ever seen, even when newly released, where I live. Also they are targeted at two different types of photographers. I think the rebel / txi line will continue on. It's a big seller for Canon. It's very much their bread and butter camera. The T5 is aimed at the budget conscious and IMO doesn't replace a rebel. It's a great camera though for the price. The SL1 fills the handbag and compact travel needs. Neither of those are a good replacement for a solid, full functional mid sized DSLR for the beginner looking to get into photography. The 70D probably seems too advanced to some of those types of people. That would be a tough choice - a very low budget DSLR, or a $1000 semi pro model. As a newbie or casual shooter I'd want something in between.

The rebel has always been that perfect balance of awesome features and performance at a reasonable price level. I doubt Canon would disturb that strategy.

EOS Bodies / Re: Canon DSLR Announcement in March? [CR1]
« on: February 19, 2014, 11:39:11 PM »
I can understand Canon "reusing" the 18mp sensor over and over again as Nikon has done the same with their 16mp sensor and now new 24mp sensor. It makes good marketing sense, in a way. I just think that it has been more noticeable with Canon as the last 5 years and 9 camera bodies have been 18mp even though there have been some small changes between certain sensor designs. Noise levels have not gotten noticeably better either, so naturally, people have become frustrated.

The 7D is 5 years old and I still think it is one hell of a camera body that is very capable. All crop sensors have noise so if your job demands noise free images, you are not looking at crop bodies anyway, you are shooting full frame.

I think the last couple great cameras from Canon were the 5D3 and 1DX and other than that nothing has been released (in MO) from Canon that is ground-breaking or anything that would make me want to give up my 7D and 40D backup. I still use my 40D and the images are stellar, I will never give up my 40D!

Hopefully, IF Canon makes a 7D replacement, it will show the "world" what a great crop body can do!


I agree the 7D is still a great camera, capable of taking amazing pictures in good light. It suffers a bit in low light though. I think a 7D replacement isn't out of the question but I am starting to doubt if it will be this year.

If Canon put in a completely new sensor, dual Digic 5, with DPAF, perhaps wifi and and touchscreen plus a higher burst rate and 4K video a lot of folk will be happy. Even without the 4K video (which I think is a stretch) this would be a great camera. Improvements to ISO noise are prob not going to be groundbreaking but hopefully better than what it is now.

Also, I think the 6D should be in the category of something great released recently. For the price you are getting superb IQ and features. It pretty much brought FF to the masses. Before that the only cheap options were the dated 5D cameras. For the same price as the 5D2 used you get a similar spec'd camera but more modern and with insane high ISO usability. Four years ago that was unheard of at that price point.

Reviews / Re: Review - Sigma 24-105mm f/4 DG OS
« on: February 17, 2014, 07:08:42 PM »
I experienced some Sigma focus shift today in fact. I was a bit perplexed when I was using LV to manually focus the 50mm at f/4, and when I took the shot it was slightly off. The 24-105L didn't have this issue. Is this due to the fact that when focusing the aperture is wide open at f/1.4 on the Siggy and f/4 on the Canon? That is kinda useless then if using LV. Makes AF accuracy even more important.

It has to do with the lens design, not the max aperture (although when focus shift affects a lens, it's usually more evident with a faster lens).  AF is always done wide open - the thing about focus shift is that the lens is the shift occurs when the lens is stopped down, which happens after AF is complete.  It doesn't matter if focus is live view or phase detect, the problem is there.  In live view, you can hold the DoF preview button and focus manually to avoid the issue.

Ah, thanks I'll try the Dof preview button next time.

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