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Messages - CR Backup Admin

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706
Lenses / Re: Canon EF 24-70 f/2.8L II Patent?
« on: January 22, 2011, 11:33:56 AM »
I'm not sure why a patent application for the design & construction of a lens has to have every single design point included.  The IS part of a lens is already covered by patents, and new patents have to cover something new & original.

There is another point to consider - Canon offer 2 different 70 - 200mm lenses, and offer them in IS & non IS versions.  There is nothing here to show that Canon can not / will not offer similar in the 24 - 70mm f/2.8 satisfying budgets and market demand.

The is unit contains optics and thus is part of the optical path being patented.  It might not be identified on the patent as a IS, but it needs to be included in the optics.

707
Canon EF Zoom Lenses / Re: Canon EF 28-135mm f/3.5-5.6 IS USM
« on: January 18, 2011, 10:49:09 PM »
A person who understands their equipment, like you, can capture great images.  The photographer is at least 90% of the equation.

708
EOS Bodies / Re: Buy now a 5D MK II or wait...?
« on: January 18, 2011, 10:47:03 PM »
Im in a same situation >< im a student and i want to upgrade to a full frame camera for this summer cuz i will be doing a lot of traveling and i love photography..so saving up 2-3G is a lot for me. I was hoping that they will announce the spec by the beginning of the year so i can decide if i want to buy a 5DMark2 or 5DMark3
Hopefully they will officially announce it before may =D

I have a 5D MK II and love it, but for traveling, weight is important, and so are lenses.  I'd recommend that you consider the package as a whole, lenses, body, flash, extenders, figure out what you need.  You will get more milage out of a T2i/ 60D plus good lenses than a 5D MK II and no money left for good lenses.

Good lenses do not need to be "L" lenses, but determine what you need in advance, since the lens part can cost 3X the camera body.

709
EOS Bodies / Re: 60D video problem
« on: January 18, 2011, 04:26:34 PM »
perhaps this belongs in the movie sohoting forum, but it is a technical issue with the camera i feel so here goes:

the card i using is a new 16GB class 10, but it is cheaper brand than sandisk for example

any ideas what caused this?

Try a different card, buy a good brand like sandisk, and buy it from a reliable store like B&H or Adorama, etc.

Unfortunately, there are lots of counterfit flash cards around that are not really what they claim, or, your card could just have a bad memory location and recording stops when the location is reached.

Give a new card a try, and if that fixes it, return the old one. 

710
EOS Bodies / Re: white balance issues
« on: January 18, 2011, 11:50:16 AM »
What value is given in exif?  That value is what the camera applied for the image.

711
EOS Bodies / Re: white balance issues
« on: January 18, 2011, 01:07:38 AM »
As someone said, if your light is narrow spectrum, then you will not be able to make colors balance, you might be missing red and blue for example.  Our brain is a marvelous thing, it fills in the missing colors so you see white where you know it should be white.  A camera can only capture what it sees.

A gray card helps most of the time, but not for certain types of lighting. 

712
EOS Bodies / Re: 1Ds3 Changes on Canon USA Website
« on: January 17, 2011, 03:43:12 PM »

A single off center point. The center one is fine, but leads to bad framing or broken by design metering, timing issues and the plane of focus topics.

Mine is great.  I have a 1D MK III for birding and sports.  Some people want the camera to do something other than what it was intended for, and complain when it doesn't.

713
EOS Bodies / Re: Ai Servo in low light
« on: January 14, 2011, 10:39:13 PM »
Can you provide a reference that says this? 

Sure, you can reference my post above, where I stated, "The AF assist lamp on external speedlites does not operate in AI Servo mode."

You are right, I tried it just now.  One Shot and AI Focus use the AF-Assist light, but AI Servo disables it.

I guess its never too late to learn something new. 

I'm going to be doing a lot of very low light photography at a upcoming theatre event, However, I'll be using my 5d MK II without flash, and its never failed to AF in low light using center point and one shot. 

714
EOS Bodies / Re: *UPDATE* More 5D Mark III / 1D Mark V & Lenses [CR2]
« on: January 14, 2011, 11:47:57 AM »
Nikon has the D3S and the D3X.  Two FF pro cameras one with low resolution but fast frame rate, and one with high resolution and slower frame rate. 

I would expect to see the same from Canon if the 1D is replaced with a FF version  and fast frame rate. 

Right now, the 1D MK IV has the same photosite density as a 27 mp FF camera, if they made the sensor FF and did not change the photosite density, it would be 27 mp.  This may be easiest to do, since the design is mostly done, it merely needs to be extended to cover a larger piece of silicone.  Undoubtedly, there are other challenges, like reading the data fast enough to get high frame rates.

It is likely the ability to move data fast enough that is a key piece of technology needed to move the 10 FPS 1D series to FF and 27 mp.


715
EOS Bodies / Re: Ai Servo in low light
« on: January 14, 2011, 11:31:46 AM »
Realise that focus assist will only work in one shot and AI Focus modes (and I'm not even sure about AI Focus, since I always use one shot in these situations).
[/quote]

Can you provide a reference that says this? 

When the external flash is enabled, AF Assist is automatic on the 1D MK IV.  It can be disabled by CFNIII-15, and it is not available in live view under certain conditions.

See pg 98, 119, 134, 216, 225 of the manual.

716
EOS Bodies / Re: Ai Servo in low light
« on: January 14, 2011, 10:18:53 AM »
The 1D MK IV is well known for its weak low light focusing.  The 5D MK II is about the best.  Attach a flash unit (580 EX II) which has a focus assist light.  That will be about the best solution.

717
EOS Bodies / Re: white balance issues
« on: January 14, 2011, 10:16:02 AM »
Are you shooting raw or jpeg?

If jpeg, use a gray card to use for setting white balance.  That will also help you set colors in post processing if you shoot raw.  There are all kinds of gray cards and similar gadgets that do something similar.

718
EOS Bodies / Re: Canon 5D Mark III / 1D Mark IVn
« on: January 12, 2011, 02:22:33 PM »

beyond that ... how about not making personal attacks on the forums here?

Agreed.

I've been monitoring the forum, and have removed posts with personal remarks as I find them. 

Think carefully before you post, I don't like to interrupt a thread, but I will remove posts, or even ban someone if they continually post objectional material.

Do report spam, I remove it as soon as I find it.

Off topic posts should be avoided as well, it makes it much more pleasant for readers if you stick to the topic.

Thanks

719
Lenses / Re: 5D MKii lens
« on: January 11, 2011, 12:41:29 PM »
Also does anyone have experience with the 24-105mm f4 L IS USM lens?

The 24-105mm f/4L IS is a great lens on FF.  With f/4, it's really too slow for capturing movement indoors, but then for that application you often need a fast prime since f/2.8 is not very fast, either.  For static subjects, the IS is great.

IQ is very good and the zoom range is excellent - it makes a great walkaround lens.  There is a fair bit of barrel distortion at the wide end - pretty noticeable depending on your subject.  I use DxO for post processing, and the software corrects the distortion very well (better than Canon's corrections in DPP).

+1

720
EOS Bodies / Re: Advice on Camera
« on: January 09, 2011, 08:56:52 PM »
I have been following your discussions on this forum for a while to learn more. I'm doing research to get a good camera for our daughters birthday. She is very serious about this, but I know close to nothing about cameras.

I have been looking at the 7D, but I can see it has been on the market for some time. I do not want to buy old tech.

Please come up with some nice advice about cameras and lenses, I'm looking at spending about 5k for a body and maybe 2-3 lenses.

If your daughter is serious about a camera, listen to her.  She likely knows what she wants.  Consider renting a camera and lens that she is interested in.  $5000 is a lot to invest for a starter, a months rental would be reasonable before making a final choice.

Neither I nor anyone else can make a reasonable recommendation for equipment without knowing her experience level, and what kinds of things she wants to photograph.  If she doesn't know, start small and then get the equipment that she needs to expand her photography as she gains experience.

If she is planning on attending photography school, they usually start with film cameras and progress to digital.  They will tell her what to get for her classes.  For serious photography, you need a serious computer, monitor, and software, so allocate money for that, its easy to spend $2500 and up on a pc and software. 

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