August 01, 2014, 06:43:01 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 - koolman

Pages: 1 ... 10 11 [12] 13
EOS Bodies / Re: Nikon unveils V1 and J1 Mirrorless Cameras
« on: September 21, 2011, 07:02:12 AM »
Just saw this on Engadget!

The traditional p&s line of cameras posses a basic drawback in the form of slow focus and shutter lag. For many home uses, and consumer uses, this is a real problem as you are forced to pose people to snap a good shot. Pictures of anything moving like a small child, or a school dance, are very hard to achieve.

The real improvement in the new(olympus, panasonic, etc.)  smaller bodies (MFT etc.) is that this hurdle seems to have been overcome. Technology now allows a fast focusing/shooting NON DSLR body. This is a major improvement and opens up a world to consumer use.

Nikon made a smart business move, to develop a small sensor body, with fast focus and speed. As sensor technology improves - the physical size of the sensor is less meaningful, allowing nikon to provide smaller better quality lenses, and keep costs down. I believe most consumers are not seeking interchangeable lens systems, and do not want to lug around a MFT body and lens. Nikon gives us a smallish body, with super fast performance.

I think this is a very smart business move.

I don't know about anyone else, but I've been waiting for 2 years for Canon just to release these two products. In my mind it's an absolute no brainer for Canon.

5D Mark III

- 32 Megapixels
- no more low iso noise problems
- 7D Autofocus
- Improved Dynamic Range
- Lower noise (signal to noise ratio not just noise reduction)

24-70mm F/2.8 IS

- Capable of resolving around 32 megapixels wide open or nearly wide open.

Seriously. They would sell these things faster than they could produce them.

The market today is being flooded with bodies. Prices of electronics are constantly dropping. The 7d did not sell well because of its high price bracket compared with the nikon D7000. In today's environment new bodies aimed at most of us - cannot be more then 2k - or they will not sell well. People are seeing tons of stuff pouring out every week, and they will wait. Existing 5d mark 2 people will not upgrade so fast - and send thousands more - unless it is a substantial upgrade.

The issue facing Canon is not tech development. I'm sure that they can produce outstanding stuff. Its a tricky business decision of how to eat the cake and keep in whole = bring out a winner body with substantiated advantages - that can be cost effective and attract a large audience of consumers.



EOS Bodies / Re: More New Full Frame Rumors [CR1]
« on: September 20, 2011, 05:27:56 AM »
<div name=\"googleone_share_1\" style=\"position:relative;z-index:5;float: right; margin: 70px 0 0 0;\"><g:plusone size=\"tall\" count=\"1\" href=\"\"></g:plusone></div><div id=\"fb_share_1\" style=\"float: right; margin: 0 -50px 0 10px;\"><a name=\"fb_share\" type=\"box_count\" share_url=\"\" href=\"\">Share</a></div><div><script src=\"\" type=\"text/javascript\"></script></div><div class=\"tweetmeme_button\" style=\"float: right; margin-left: 10px;\"><a class=\"tm_button\" rel=\"&style=normal&b=2\" href=\"\"></a></div>
I received two other emails today talking about what could be coming in October from Canon.</p>
<p>According to one of the emails:</p>
<blockquote><p>Canon will be launching a new camera later in October. Already in production and described internally as a “Nikon-killer”, it is reportedly a camera with lower megapixels than might be expected for a new release, but with excellent dynamic range and ISO performance.</p></blockquote>
<p>No one has come forward in the last while to say a new 1Ds Mark IV or 5D Mark III were in the immediate pipeline, for the moment this appears to be it.</p>
<p><strong><span style=\"color: #ff0000;\">c</span>r</strong></p>

Canon's main advantage is its L line of lenses. For crop cameras - the L's focal Lengths are a bit ridicules - as the 24 is not wide, the 16-35 is a fortune and not ultra wide, the older fast primes preform mediocre on the crops.
The 24-70 - behave differently on a crop - as the longer end was not made to focus at such a magnification (you need to stand further away from your subject).

The body race is in the field of electronics (sensor and processor development). It makes much sense for Canon to introduce more affordable FF bodies. This will achieve a few things simultaneously:

1) Give this FF body a substantial advantage over all the MFT new bodies FLOODING the market - who's IQ is quite near (if not even better) then the crops.

2) Open the L lens market to many more consumers.

3) Allow a real jump in DR - which again will "jump" the canon body way ahead of what crops can do.

In other words - the rumor of an affordable FF - in my opinion - reflect a wise business move.


Canon General / Re: Autofocus Problem / Question
« on: September 20, 2011, 05:12:57 AM »
neuroanatomist: Thanks for all the info and explanations. I just did some more test shots - and you may be right! It seems that there is a slight front focus issue - noticeable only at very wide f stops and "masked" on consumer lenses.

I will try and compensate for this meanwhile by focusing on a spot slightly farther away from the spot I want the focus on. I can also just use live view if needed.

I would like to upgrade the body - however at this point in time I would wait to see what new bodies appear then purchase the 7d - a 2 year old camera - which is fundamentally my 550d in a fancier package. I'm not a pro and I need to watch the budget.

There is a very good writeup and chart here.

It is basically the starting point for the commercial lens align product and works well.

I find that I get excellent focus adjust accuracy at relatively short distances where the shallow depth of field becomes apparent.  not macro, but say 5-7 ft for a 35mm L.

Canon will adjust your 50mm f/1.4 lens at no cost if its in warranty. 
Otherwise they have a flat $95 fee for repairs.  Its also possibly a combination of tolerance stackup where the camera and / or the lens needs adjustment.

I'd get it fixed, its worth it to have it right-on.  Send in camera and lens so they make sure the right one is fixed.

I had a XTi bpdy that was off, and it had a simple screw adjustment to adjust the stop screw for the sub mirror.  Two clicks of the screw and everything was perfect.

Hi, I live in Israel - and sending the camera abroad for this is a bit much. Local canon representative will charge allot and I'm afraid that messing with the body could cause more harm then help - as it could mess up other lenses.

We are talking about a "slight" front focus issue - noticeable only at f stops < 2.5 . I can compensate meanwhile manually - and eventually I'll upgrade the body for something with MF adjustments.


Canon General / Re: Autofocus Problem / Question
« on: September 19, 2011, 07:29:19 AM »
It does not seem to be a back/forward focus problem - just lack of capability to achieve sharp focus. 

If I focus using the sensor in live view mode - the focus is almost always tack sharp - or at least much better, even wide open at 1.4 - and beyond 2 tack sharp.

1) Can someone explain this phenomenon?

Why do you think it isn't a back/front focus problem?  I ask, because what you describe sounds like a classic case of a need to adjust your AF - the phase detect AF is off a bit, whereas the contrast detect AF (Live View) is spot on.  Phase detect uses a separate AF sensor, which may be slightly misaligned relative to the image sensor (that misalignment can affect different lenses in different ways).  Contrast detect uses the imaging sensor, so there's nothing to be aligned/adjusted.

Granted, the 50/1.4 has some halation wide open, and that results in a slight softening of the resulting images - but if they're sharper using live view, that really points to an AF issue. 

AF issues (front/back focus) are most evident in shots with a shallow depth of field (like you get with the 50/1.4 at a wide aperture). A similar issue on a typical consumer zoom (f/3.5-5.6) would likely never be noticed.  That's also why you aren't noticing an issue at f/2.8 and narrower - the deeper DoF masks focus errors.

Is this reproducible, e.g. does it happen with different subjects?  That's important, because one thing many people don't realize is that the actual AF point on the AF sensor is larger than the little box in the viewfinder.  That means that your chosen focus point may have features that cause your camera's AF system to lock onto something you didn't intend, even within one AF point.  See the attached image below - a member of another forum was compaining that two successive shots with a 135mm f/2L had different focus, but when I superimposed the center AF point of the 7D (the camera used by that person), you can see that the AF system was merely locking onto different features of the key each time.  You can also see how the actual AF point sensor is alrger than the representative box in the viewfinder.

The ideal way to test AF performance is with a commercial tool like a LensAlign or SpyderLensCal - those have a focus target that is parallel to the camera (and aligned properly), and a readout 'ruler' at an angle to the camera.  Since buying one just for this seems unwise, try printing this starburst target, then tape it to a box on a table, and line up a row of somethings (batteries work well) next to the box, extending toward and away from the camera.  Focus on the target straight on, and see which battery is in focus (the one adjacent to the target, or forward/backward of that).  Compare phase AF and Live View.  A tripod would work best, assuming you have one.

2) Would a more advanced body (say a 60d ) have better autofocus results ? Is there a difference even using the CENTER focusing point between the 550d and the 60d ?

There might difference between the center AF point in your camera and a more advanced body.  The 60D (and 40D/50D) as well as the 7D have a more complex center AF point.  Yours has two lines, one sensitive to f/5.6 and the other sensitive to f/2.8 (the 'high-precision' part).  The xxD and 7D bodies have a +-shaped f/5.6 sensor with an X-shaped f/2.8 sensor superimposed on that, so you're getting the f/2.8 presicion in two orientations instead of just one.  But as stated above, I don't think that's the problem in your case.

If the problem is a misadjusted AF, a more advanced body would help.  But not the 60D.  The feature that allows a user to correct AF issues on their own is called autofocus microadjustment (AMFA), and the 60D doesn't have it.  The current xD bodies have it (1-series, 5DII, 7D), as does the 50D (but Canon dropped AMFA from the 60D, for no apparent reason other than to differentiate the lines, as it's a no-cost feature).  Personally, I'll never by a body without AFMA - all of my AF lenses have some amount of adjustment applied, but it's most important with the fast primes.

Hope that helps...

neuroanatomist: Thanks for all the info and explanations. I just did some more test shots - and you may be right! It seems that there is a slight front focus issue - noticeable only at very wide f stops and "masked" on consumer lenses.

I will try and compensate for this meanwhile by focusing on a spot slightly farther away from the spot I want the focus on. I can also just use live view if needed.

I would like to upgrade the body - however at this point in time I would wait to see what new bodies appear then purchase the 7d - a 2 year old camera - which is fundamentally my 550d in a fancier package. I'm not a pro and I need to watch the budget.

Canon General / Re: Autofocus Problem / Question
« on: September 19, 2011, 06:03:08 AM »
the first thing is discount the obvious, are you shooting at a fast shutter speed?

You can get camera and lens calibrated to give better focusing.

Yes, I am shooting at a high speed and leaning on a table to further steady myself.

I live abroad and giving in my gear is problematic. Secondly, canon often will match the body with this particular lens, but create issues with other body-lens combo's.

Canon General / Autofocus Problem / Question
« on: September 19, 2011, 03:45:32 AM »
This is for those of you who have deeper tech understanding of what goes on inside the camera:

Question that is bothering me:

I have a rebel 550d (t2i) + canon 50mm 1.4 prime. Even when I try to carefully focus using the center focusing point only (which is supposed to be most sensitive) the prime often "just" misses and the picture is slightly / moderately blurry - depending on how wide I opened the lens. 1.4 - 2.5 are almost always slightly off. It does not seem to be a back/forward focus problem - just lack of capability to achieve sharp focus. 

If I focus using the sensor in live view mode - the focus is almost always tack sharp - or at least much better, even wide open at 1.4 - and beyond 2 tack sharp.

1) Can someone explain this phenomenon?
2) Would a more advanced body (say a 60d ) have better autofocus results ? Is there a difference even using the CENTER focusing point between the 550d and the 60d ?

Thank you all

EOS Bodies / Re: Advice on purchasing a new APS-C body
« on: September 11, 2011, 04:25:41 AM »
Get a room, you two!   :D   Killswitch, I agree with other posters that unless you have some need for what the 7d offers over the 60d or the Rebel line, I'd buy a less expensive body and put the balance into some more glass.  Maybe an EF-S 60mm macro or a 35mm f/2?  A telephoto zoom like the 55-250mm would be good buy as well.  Enjoy your new purchases!

Lol, ya I am most likely going to go for the 60D (better body and weight than the 600D)...and really need a telephoto zoom. Confused whether to go for the 70-200 f4L IS or the 70-200 f2.8L non IS. Also if not the L lens, which one is better in terms of sharpness, the 55-250mm or the 70-300mm?

Hi Kill,

I would go for the 70-200 f/4 L IS. Its light, very sharp, and simply fun to use. The 2.8 version is much heavier, and you might find not useful with no IS. The IS version mark 2, which is superb, will cost you 2.5 k and is probably a huge overkill.

EOS Bodies / Re: Advice on purchasing a new APS-C body
« on: September 08, 2011, 04:32:28 AM »
I currently own a Canon 60D, and a Rebel XT (aka 350D). I have the following lenses

1) Canon EF 50mm f1.8 II
2) Canon EF-S 15-85mm f3.5-5.6
3) Tokina 11-16 f2.8

I share these gears with my wife, and most of the time we go on a photowalk together. I am not a pro, but a hobbyist and slowly finding myself devoting more and more time in photography these days. I was thinking of buying the Canon 7D for me, but I was wondering if I should wait till the announcement of new cropped sensor bodies (if there is any). So far rumors indicate only FF bodies :( I am in no hurry to buy one but was wondering if buying the 7D now would be a wise decision. Any suggestion would be greatly appreciated!

Your lens selection is very nice - and the 60d is a superb body for your needs. The issue I understand is a second body for your wife - who is "stuck" with the older 350d while hubby has the new flashy 60d.
I personally would not "solve" this problem by purchasing a 7d now for $1,600. Get your wife a 600d - nice sized camera for a woman - and your good. The 600d is the same basic specs of the 7d for 1k cheaper.

EOS Bodies / Re: Having Multiple Camera Systems
« on: September 08, 2011, 04:20:19 AM »
Many thanks to all replies.

We both play with manual adjustments. Especially, with ISO, aperture, shutter speed, and compensation. We hardly touch the white balance.
My P&S is very noisy above ISO 200 and its flash is not powerful enough longer than 3 meters.
Outdoor pictures are good. I hate the lag between pressing the shutter and the actual snapshot.
When my daughter perform on stage we both are watching.
So me using the heavy gear is not a problem.
When my wife is alone she need a much lighter camera.

She wants to be able to use higher ISO.
To catch the moment and not miss it due to slow performance.
Take better video clips (SX100 IS capture 640 X 480 only).
Play with depth of field.

We do not use post processing and not planing to.
I guess jpeg quality is enough for my use.
On the other hand, i will probably want to try HDR in extreme light conditions.

It will never be more than a hobby.
However, my wife invest lots of time on this hobby.
After every trip abroad she use a photo album software and print the final album as a book (printed by professionals on a quality paper).

Three months ago a friend gave us his old Nikon D70 with 18-135 slow zoom.
The pictures were better than with our P&S.
However, it was too heavy for my wife and the lens did not offer a lot more.

I found Canon easier than Nikon.
However, if i have to choose one system, it probably would be a mirrorless Panasonic (I hope no one offended).

Currently, we take the camera everywhere and we do not plan to change that.

Sorry for not providing all answers on the first post.

It sounds like your wife's preference is something small, with high ISO speed and fast shutter speed response.
The fast shutter speed is tricky as this is a problem that has plagued all NON DSLR cameras - until recently. Now the newer generation of MFT bodies like the olympus pen ep3 or the panasonic GF3 - seem to be as fast as a DSLR. I assume P&s bodies will catch up soon. The Olympus Pen by the way - may be a good choice for your wife. It has a slew of lens options, and might be able to serve all purposes. They even have fast primes for it, like the new 12mm f/2 and the new 45mm f/2.8.

Assuming you want to purchase another camera for yourself, and are not restricted by weight, then a basic DSLR like the 600d or 60d + a 15-85 lens could help you.

Both the PEN + the 60d + lens - will still be belllow the 4k budget.

EOS Bodies / Re: Having Multiple Camera Systems
« on: September 07, 2011, 06:28:09 AM »
Currently all I have is a Canon SX100 IS point and shoot.
In the film era, I had a Pentax SLR with 28-80 cheap lens (abandoned when went digital).

My wife takes more than 100 snapshots and several videos per month.
We want a better camera and can afford spending up to 4000$

We do not make money of photography.
Most of the snapshots are of our family.
At least half are taken indoor (low light).
About 5% are in low light plus long distance such as performance on stage.
Most of the rest is outdoor.

My wife wants a small camera and I want fast lenses.

What do you say about the following combination:
  • Canon 600D + 50mm f/1.4 + 70-200mm f/2.8 IS II
  • Panasonic GF3 + Lumix G X Vario PZ 14-42mm f/3.5-5.6 + Leica Summilux DG 25mm f/1.4

This combination provides:
  • Extremely small camera for standard distance.
  • Fast lenses on both 50mm and 80mm (35 equivalence).
  • Best zoom on 100-300 (35 equivalence).

On the other hand, investing in two different camera systems costs money.

Any comments?
Any better alternative with similar cost ?

Dear Ehud,

You basically want/need a camera for family pics, both outdoor and indoor, which account to 95% of your usage, +  "5% low light + long distance"  like on a stage from a distance.
You also mention a fondness for fast lenses, and a preference for small bodies.

$4,000 !! for family pictures ! wow.

I would suggest:
1) canon 600d + 15-85 zoom + flash. That will cover all your family pics indoor + outdoor.
2) To satisfy the fast lens need: canon 50mm 1.8 OR canon 35mm f/2. I am fond of the 35 however it is a "normal" lens, not a portrait lens.
3) As far as the stage from a distance in low light. The 70-200 L 2.8 mark2 - is a very heavy expensive overkill, and I don't see a parent/needing or  lugging around such a heavy, expensive, professional lens. This lens was intended for pro's shooting action like a basket ball game.
As I assume your stage activity is not fast moving like sports, you probably could get away with the 70-300 IS, or the 70-200 L F/4 IS. You can also consider a fast prime if the stage distance is more or less constant such as a 85mm 1.8, or 100mm 2.8 macro.

1) camera 700 + flash 400 + lens 750 = 1850
2) 100
=1,950 (and is probably all you need)
3) the zooms I suggested are 500 - 1200 additional - the primes all around 350.

Lenses / Re: wide angle lens
« on: September 07, 2011, 04:11:13 AM »
Hello folks. I've been with canon brand for past quite a few years. I currently have Canon 5D Mark II, menawhile I got some lenses and I am quite happy with them but I am looking for realy good wide angle lens.
For me the most importnat thing with lens is the F stuff, so the lower it gets the better for me, so for me lenses that are 2.8 or lower are the ones that I love the most. Anyway which wide angle lens would you recommend? Which one is the best? Which one can capture the most of the area without getting any significant distortions (fisheye type)?

If money is not an issue 16-35L mark2 - superb option

Lenses / Re: New L Series Lenses coming out with the 5D Mk3?
« on: August 31, 2011, 04:51:23 AM »
Here is my perspective on your comments:

The physical size of the sensors - is swiftly becoming less and less relevant, as electronics and technology progress.  Having a "FF" sensor - is much less a landmark achievement today. If you compare a 7d with 5 years ago's FF DSLR - you will quickly see that the 7d is far superior in IQ.

I believe this will become even more true in the near future - as superior small sensors will easily outplay larger sensors.

If so, I am not sure I understand the wisdom of purchasing the mark3 for $2,500 ~ just because it is FF. (unless of course you need it for your professional use right away as part of your business as a photographer)

As far as a 24-105 2.8 - Sure such a lens could be produced - however it would be a very large heavy expensive piece for it to retain both IQ and the 2.8 and the focal length. I'm not sure its business savvy to produce such a lens. The 24-105 is aimed as a convenient quality walk around lens,  not a specialty lens.

EOS Bodies / Re: Exposure Compensation
« on: August 29, 2011, 02:39:58 AM »
I'm away on holiday a the moment, so taking quite a few photos, but realised tonight that most of my photos in the last two days have involved me tweaking the exposure compensation.  Out of curiosity, is this normal ? Do others tweak all the time, much of the time or not at all ?   Do others tweak a little or a lot ?

I have a t2i which is in the same family as your camera. All my flash photography requires some level of manual intervention - as the camera cannot guess the exposure accurately.

Additionally, photos taken outside in bright light, that often has allot of contrast, will require tweaking if you want to get the exact right balance.

Canon General / Re: Kiss of death . . .
« on: August 25, 2011, 05:51:28 AM »
To back up a pair of pro bodies I have always travelled with a 'pro compact'.  However, the nature of my photographic work is such that I require a powerful lens on the compact.

I have never managed to bring myself to get rid of any of my old Canons, so now have, in effect, my own mini museum.  While glancing through the cameras last night, I realised that I seem to put  kiss of death on the production line of any 'pro compact' that I buy: rarely does that camera line manage more than one incarnation.  If the product line does continue, there is a 3 to 4 year gap between models.

My 'collection' starting with the oldest:

  • 1990 - EPOCA (magnificent 35mm with 35-105 lens, superseded by the EPOCA135 in 1992, then line ended)
  • 1998 - PowerShot Pro 70 (6-15mm zoom, 1.7MP, in the days when digital cameras didn't have zooms!)
  • 2001 - PowerShot Pro 90 (7-70mm, 3.2MP)
  • 2004 - PowerShot Pro 1 (7.2-50mm L, 8MP, I love this camera - 8MP seven years ago and an L Series lens)
  • 2008 - PowerShot SX1 IS (5-100mm, 10MP, a bit lightweight and plastic after the Pro 1, but no other option)

Since buying my PowerShot Pro 1 in 2004, there has only been one 'pro-ish' powerful zoom compact (SX1 IS).  By contrast the  'consumer' range of powerful zoom compacts has evolved at the rate of one each year since.  I'm no gambler, but I see a PowerShot SX50 IS coming out this year!
  • 2004 - PowerShot S1 IS
  • 2005 - PowerShot S2 IS
  • 2006 - PowerShot S3 IS
  • 2007 - PowerShot S5 IS
  • 2008 - PowerShot SX10 IS
  • 2009 - PowerShot SX20 IS
  • 2010 - PowerShot SX30 IS

So, what of the future . . . there must be enough people in the World who want a high quality, powerful compact, to justify another model being produced?  Something with the build of a G-Series, but a 20x (or more) zoom?  I have had a look at the PowerShot SX30, but it is a definite step down from the SX1 (which itself was a big step down in terms of build quality from the Pro 1).  The G12 is a lovely camera which I have had the pleasure to use, but try having that as an emergency back-up for wildlife photography in Africa . . . not quite punchy enough on the lens front!

Dom: The prices of DSLR's have some so close to the compacts - why not just throw a rebel into your bag as the backup camera?

A t2i with a canon 35mm f/2 + 70-200 f4 IS - should more then cover anything you would need.

Pages: 1 ... 10 11 [12] 13