July 23, 2014, 08:44:14 PM

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Messages - PhotographerJim

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1
EOS Bodies / Re: ISO D+ function
« on: June 29, 2014, 10:28:12 PM »
I made the test
2 shots using same ISO (200), speed and f stop

Except they weren't the same ISO, because your camera lied.  ;)


im pretty sure it does sweet FA in raw but i might be wrong.
It just applies a different process to the raw file than it normally would
check the manual

It's not so much that HTP affects the RAW data per se, but it does affect the RAW metadata in a way that's not handled properly by anything but DPP.

What HTP does is deliberately underexpose by one stop, and 'misrecord' the ISO in the metadata - that's why ISO 100 isn't available when you turn on HTP, i.e. you set ISO 200, it shoots at ISO 100 but records 200, or you set ISO 800, it shoots at 400 and records 800. If shooting JPG, it processes the underexposed image to brighten everything except the highlights (meaning it applies a tone curve).  If shooting RAW, it sets a metadata flag so DPP can apply that tone curve. 

If you open that RAW file in a 3rd party converter, results vary. Some ignore the flag and you just get an underexposed image.  Others compensate by just boosting the total exposure by one stop - I think ACR (LR/CS) does that.  Of course, that just re-blows your highlights and adds shadow noise. AFAIK, no 3rd party converter tries to replicate the tone curve to preserve highlights. 

So, if you shoot RAW and use a converter other than DPP,  I'd leave HTP off so your reported ISO reflects the actual ISO used to take the shot, and just expose properly to preserve highlights.  You can apply your own tone curve, not limited to the one full stop forced by HTP.

Thanks for the info Neuro, you always amaze me...  8)

2
EOS Bodies / Re: Patent: Canon 5 Layer UV, IR, RGB Sensor
« on: June 29, 2014, 10:10:52 PM »
I'd love to have a 120mp APS-H that can do 9.5fps...I really wonder why they haven't stuffed that wonder into an actual DSLR and just trounced all the competition.

Its a wonder for Photographers who need much MP.
 I want a camera with extremely lowlight performance (like or better than Sony a7s). A 120 MP Sensor hasn't it  :-\

Pixel size doesn't matter for low light performance.

The notion that pixel size affects noise is largely a myth.

I think it comes from film days, where the higher the film speed, the more grain, due to the larger silver halide crystals which made it more sensitive to light.

3
Pricewatch Deals / Re: Deal: Canon Pixma Pro-100 $34 at Adorama
« on: June 28, 2014, 09:14:45 AM »
I ordered one yesterday, $34 is a no-brainer. Even with the cost of ink, it's still less expensive than having quality prints made. Especially if it comes with decent paper too. I'm looking forward to it, lots of good reviews, and my experience with Canon printers has been very good.

Now I need to learn about color management & profiling....  ::)

4
Lenses / Re: What was your first L lens?
« on: June 06, 2014, 09:20:10 PM »
24-105mm L

5
EOS Bodies - For Stills / Re: 6D or 5DM3 need your help guys
« on: June 01, 2014, 07:07:49 AM »
I have the 6D, there's a reason why they paired it with the 24-105mm, they make a great combination. Purchased as a kit, you can usually get a really good deal.

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EOS Bodies / Re: Patent: Canon EF 100-400 f/4.5-5.6 DO
« on: May 24, 2014, 03:43:02 PM »
I have the current 70-300 DO, I use it often. I love the small size & light weight. For all the bad opinions it gets it really is a great lens. I don't know why most people are so negative about it, I'd buy it again. It does have less contrast, but there is a camera setting for that. Dial it in, and you're good to go.

Granted, I didn't buy it new, $1400 seems too much for it. I got an almost new one for $550, I guess that's one benefit of all of the negative reviews :)


7
I have a 6D with the Canon grip, it doesn't add that much weight or bulk. The 6D makes a brilliant landscape camera, as long as there is decent glass in front of it. The GPS does use power, but not as drastically as some say. No issues shooting all day (even shooting video) with my gripped 6D with GPS on full time. Just don't leave it on overnight or you could loose 5-10% charge.

8
The MTF's do look very good!  I'm also pleasantly surprised by the initial pricing, after reading the introduction I was guessing $1,600 and $350.  For a landscape photographer they look like terrific options.  I'll be waiting for the hands-on reviews, but the 16-35 immediately goes on my list of most wanted lenses.

Agreed, this looks like it's going to replace my 17-40mm VERY soon!  :D

9
Also, I understand that one thing that's pretty hard to miss is that it polarizes the sky unevenly. Is this too conspicuous that IQ is compromised?!


Most wide-angle lenses w/circular polarizer will do this, if I understand right. See: http://havecamerawilltravel.com/photographer/polarizing-filter-wideangle-lens
Has to do with physics and the angle of the sun vs. camera.

10
Slight change of country: F/A18C's of the Swiss Airforce at the Axalp demo(and this one you have to climb to 7,000-feet for):





Such an incredible shot!  :D  8)

11
Lenses / Re: Just bought a 70-200 f/2.8L IS II - A Few Questions
« on: March 15, 2014, 06:38:10 PM »
:)

One more question. Could someone please check on his 70-200 II lens, if he also notice a bit of movement on focus ring (up/down, left/right). On mine, there is bit of play before the focus ring really grabs. Because if I compare it to the zoom ring, that one is solid with no play in any direction. Thanks

None here

12
5D MK III Sample Images / Re: P-51 Mustang
« on: March 04, 2014, 07:54:01 PM »
A P51 and a friend
Love both of these, not sure which I like better, the Spitfire is one awe-inspiring aircraft!

13
EOS Bodies / Re: Hardware Hack for EOS Cameras Coming Soon? [CR1]
« on: February 27, 2014, 05:38:11 PM »
Not so much...

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Lenses / Re: A Big Lens Announcement in September? [CR1]
« on: August 29, 2013, 05:05:01 PM »
A new-and-improved 100-400?

This lens is loooong overdue and would likely sell like hotcakes, as did the current version.  I was recently looking at Nikon and they have a new improved version of their 80-400 and the reviews are off-the-charts positive.  The improved Canon would need zoom ring instead of push pull and preferably start at 80mm instead of 100mm to match Sigma and Nikon.

I would be very happy with a 100-400 f/4

15
6D Sample Images / Re: Anything shot with a 6D
« on: April 07, 2013, 12:24:38 PM »
I did a series last night using an ND64x while standing out on a (still) frozen river.  I am slowly building up filters in the 82mm and am considering whether to move some of my 77mm filters and just use a step up ring.  Anyway, this shot is the result of three bracketed exposures hand-blended using luminosity masks.


Still Winter, Still Beautiful by Thousand Word Images by Dustin Abbott, on Flickr


Wow, good shot!

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