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Messages - Mt Spokane Photography

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currently using Sandisk Ultra (probably their slowest card now  :-\ ) on my 5D1.

i find this combo to be very slow for writing speed (don't really care for reading speed).

and seeing these Extreme (not Extreme Pro) CF cards goes for $35 for 8GB at B&H, wondering if running one of these faster CF would benefit me at all? or is it limited by my buffer? which seems to be small?

I shoot Jpeg most of the time now becoz of this, shooting Raw is really lagging.

i assume the 5d2 and 5d3 has larger buffer, wondering what user with older Canon body like mine are using and want to hear their experience.

The fast speeds on modern cards are due to UDMA.  Your 5DC does not have UDMA, so you will gain little speed and might even lose some.
Don't waste your money.

EOS Bodies - For Stills / Re: 5d III CF and SD card
« on: October 12, 2012, 07:19:48 PM »

As CF cards are quite expencive would it be a better idea just to buy one 8GB 600x CF card and one 32GB SD and than just copy raw files from CF to SD from time to time?

Watch out, memory cards are very confusing, and so are the speed specifications.  Many SD cards advertise a speed that only works with UHS-1 readers and writers.
This means that you are paying for speed that you will not be able to use.  The cards fall back to a slow speed in a 5D Mark III.
On the other hand, CF cards will operate at full speed in the 5D MK III.  Even a cheap CF card will be faster than a fast SD card.
You paid $$$ for your camera, get a decent CF card for it.  16 or 32GB 60mb/sec cards are available for a good price and are faster than the fastest SD cards that will work in the 5D MK III.

So i was looking up diffraction limits and i noticed that on my crop body, 60D the diffraction limit is f/6.9.

What does this mean in practical terms?  If a lens i have is sharpest between f/8-f/11 should i still keep the aperture greater than f/6.9 because of this limit?

Thanks guys
Diffraction is a property of lenses, not sensors as your title suggests.  Therefore, a 60D does not have a diffraction limit. 
Resolution of a lens depends on the lens design, and will be highest at different apertures for different lenses.  However, having a high resolution is only one part of a high IQ.  As you stop down, most lenses have reduced distortion, and reduced CA's.
Where a sensor comes in, is that sensors with more resolution can see diffraction better, but it is caused by the lens.
As you can see in this chart with a 15mp Canon 50D and 40mm f/2.8 lens,  the resolution does not vary greatly out to f/8.  The Chart below it shows basically the same pattern for the 5D MK II

40mm on 50D

40mm on 5D Mark II

Now, here is the Canon EF 100mm f/2.8 USM Macro lens.  It shows the effects of diffraction really taking hold at f/16 and f/22.
100mm on 50D


I don't see any significant drop in price (below $3000) for a long time.  Canon will probably do a rebate around the holidays or early 2013 which I wouldn't expect it to be more than $150.

The Adorama and now the Beach Camera ebay sales puzzle me.  I still do not understand how and why they were able to do that.  I've read what others have posted but I remain skeptical.  I would not count on a 3rd ebay sale but who knows.

If I was aching to pull the trigger, I'd try and wait until Thanksgiving/Black Friday.   If no sales or rebates then, just order it and enjoy.
There has been a below $3000 sale each month for 4 months now, no reason not to expect another one.  I think Canon is reducing excess inventory each month to avoid getting caught like they did last Christmas.

Firmware does not change the sensor. Raw images have little manipulation in camera, its all in PP.  The jpeg images might be better, but I do not use jpeg.

EOS Bodies - For Stills / Re: Unreliable AF on 7D with FW 2.0.3?
« on: October 12, 2012, 11:57:23 AM »
Did you redo the AFMA?  Resetting everything like major new firmware might require it.  The fact that your lenses focused accurately on a different camera body does not mean that they do not need AFMA on the 7D.

Lenses / Re: Kenko TC and AF at F8
« on: October 11, 2012, 09:10:39 PM »
So with the 2x Kenko TC attached to the 1DX is AF slow and useless or sluggish or just a peppy as it should be?

anyone having a go with this right now??
Avoid the Kenko 2X, it is weak.  The 1.4X is good though. 

Lenses / Re: Canon fd lenses
« on: October 11, 2012, 09:07:52 PM »
Which FD-EOS adapter?  You may be dissappointed if you think the cheap Chinese ones will work well.  Ed Mika makes some good adapters and conversion kits.  You get what you pay for.
Ed Posts regularly on this forum. 
IMHO, it will be easier and less costly to purchase a old Nikon film body with good lenses.  Its much easier to adapt Nikon lenses to EOS than FD to EOS. 

Lenses / Re: Kenko TC and AF at F8
« on: October 11, 2012, 06:44:28 PM »

neuroanatomist, thank you for the explanation.  Hopefully, someone in the Canon organization will wake up and see what the competition is doing and upgrade the firmware.  Guess I need to put a Kenko 1.4x in my next order.

I'm afraid that Canon's version of Upgrade the firmware is to upgrade it so the Kenko will not work.

The focal length specified is at infinity, each lens will vary if you are close.  Put them 50 ft away and compare.

Lenses / Re: Calibrate Canon 24-70L?
« on: October 11, 2012, 11:26:30 AM »
Ok, so here it is. I haven't gotten around shooting at a brick wall yet. But I think I will throw in more tests. This is what I did

1) mounted on a tripod, 70mm, set to AV priority, @5.6, ISO 100, AWB. Center focus point selected. Shot in a living room at night.

2) shot normally (2 sec timer, mirror lockup enabled) @ 5.6 aperture

3) live view (2 sec timer, AF Live) @ 5.6 aperture

If I did this right, then OMG. The shots from AF Live, is way sharper then normal Phase detect AF. I am including the full shot and a 100% crop of the top part of the book.
In that case, get it calibrated, or, if you cannot get it done free, consider selling the 60D and get a 7D and do it yourself.  You will then be able to use the AFMA for all your lenses.  You might be pleased at the difference.

Lenses / Re: Need opinions on telephoto choice
« on: October 11, 2012, 11:22:39 AM »
300mm is really not long enough for birds, don't buy one to use with a TC.  Look for a used 500mm IS MK I.
The 100-400mm IS MK II has been rumored for 7+ years, I would not count on any rumor.  The existing one is about the best value around.  I find that it autofocuses fine with a Kenko Pro 300 DGX on my 10D as well as my 5D Mark III.  I just bought the TC and will look at the quality in a couple of weeks after my hand heals from recent surgery.
The 400mm DO is another option to look at.  The newer ones seem to be pretty good.  Canon has refined the process for making DO lenses over the years.  The trick is to control CA's, and they are doing it well.

Lenses / Re: Kenko TC and AF at F8
« on: October 11, 2012, 12:39:33 AM »
Hope the surgery went well!

Regarding the Kenko 1.4x, maybe I blew it.  I could have just gotten that to use with my 100-400 for a 560mm f/8 lens with AF.  Let's say the Kenko is as good optically as the 1.4xII - that can't be too bad compared to the 600mm f/4L IS II, can it?!?

Actually, on a serious note, Art Morris is really pleased about the Kenko 1.4x and the 800/5.6L IS.  He's got some very nice image to back that up.  But interestingly, when I look at TDP's ISO 12233 crops, the optical performance of the 800/5.6 + 1.4x (no real difference between MkII vs. MkIII there) and the 600/4 II + 2x (link), they look pretty similar (which makes sense - the 600 II is a better lens, and the 600 II + 1.4x is optically a tiny bit better than the 800/5.6).  So, for static subjects (where Live View AF would work fine), the 600 II plus Canon 2x would be worth a try...

Now I just need to decide if it's worth swapping the 2xII that I have for a 2xIII.  There is a chart comparison for the 2xII vs. 2xIII with the 70-200 II, and there's a marginal improvement - since I'll occasionally use that combo (when I don't want to bring both the 70-200 II and the 100-400), it may be worth upgrading just for that...
I took some pain killer, so it feels better now.  The surgery went fine, my left hand was done 3 weeks ago and is healing well.  I want to be healed before winter, I'm out in the country and have to run my tractor to plow my almost 1/4 mile driveway.  I need a good grip sometimes when it starts sliding.
I'll also want to try the TC on my 100L, more magnification is sometimes handy, I don't have the mp-e 65.  I did put it on my 24-105 where it worked fine, but there is little point to using it there.
I do have a number of older consumer grade lenses which are marginal without a TC, but I might try it with them just to see if they autofocus.
I'm also curious about combinations of TC's,  With my 1D MK III I've seen my 1.4X and 2X autofocus even at f/11.

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