Messages

541

Street & City / Re: Your best street shots of any kind.

« on: January 22, 2013, 11:24:50 AM »

This was taken at an impromptu demonstration against the British National Party.

Good visual on our fear, Paul. Collectively, we humans live in dread of "the other" and change and anything that seems to threaten our own security. Yet the irony is that our interdependence and change are our strengths and the fuel of our progress. You've endeared yourself to me with this little story, Paul.

I haven't been to Glasgow in 30 years, but I liked it when I was there. And Scotland has some of the best land and sea scapes I've seen anywhere. (Oh, and the best milk I've EVER had too!)

Scapes? You talk about land and sea scapes! Whiskey man! Whiskey!
 

And for his wonderful description - and the photo, (Paul, you can swap those two around if you want) you da man!

542

EOS Bodies - For Stills / Re: ISO 50

« on: January 22, 2013, 09:27:11 AM »

Neuro wrote: Sorry, but you seem to be falling into the same trap and suffering from the same misconceptions as Mikael.

No it is about words, and what we mean.

And where  is  my earlier  post?

HTP is nothing else than while the camera metering for 200iso  the gain is smaller (around 100iso gain) and thereby we get a head room. ( I describe this as under exposure) because the camera  metering after 200iso)
You get the same effect by under exposing 100iso 1 stop  and later correct the raw file  in the raw converter
In Jpg the camera lay a smoother contrast curve which make a smoother high light reproduction and also lift little bit in lower levels which make the noise little bit visible.
I hope I have make this message readable
Have a nice day

pardon my intrusion here Mikael, but the words and concepts you are using in the above is not under question.  WHat is under question is the posts where you say that the HTP causes half the number of photons to reach the sensor.

Yes Mikael, from my perspective you need to review you post on the first page where you mention this. You then say that results in half the charged electrons. That is not right. The same number of photons would be collected in the photo site irrespective if you has set HTP or not.

I hope you understand this. Afterwords, after all the photons are collected and a signal is generated, things happen resulting in what you describe in that post as "half the charged electrons"...

If you disagree with what I have written, do let me know what you disagree with.

Thanks.

543

Street & City / Re: Your best street shots of any kind.

« on: January 22, 2013, 07:52:47 AM »

This was taken at an impromptu demonstration against the British National Party.

I happened to be walking down Glasgow's main shopping area with my camera bag when my attention was taken by some ragtags and bobtails wearing hi-vis vests with the union jack flag on them.

Alarm bells rang and I hung around to see what developed, within 5 minutes there were civilians of all creeds, class, colour and age protesting against these anti-immigration loon-balls, to the point where Police were mobilised for their protection.

I love Glasgow.  It has it's faults, but most of it's people are solid gold, and generally we stand up together against to people like this.

Glasgow was once one of the worlds busiest ports, our ships mobilised world trade, and brought impoverished hungry Irish and persecuted Jews to our city, enriching it's culture, fighting in our Army's, providing both brain and brawn to our industries.  We have a history of acceptance, of refuge.  And thats why we stand up to the BNP, when they attack the Eastern Europeans and Muslims who have made Glasgow their home in more recent years.

Wow! I did not know that about Glasgow! Great! More power to integrated societies.

544

EOS Bodies - For Stills / Re: ISO 50

« on: January 22, 2013, 07:24:33 AM »

@Neuro:
Neuro:

It's only half the photons if the aperture is set a stop narrower or the shutter speed is set a stop faster.

And not if ISO is reduced by a stop? Does the sensor not reject half the photons when it is 'asked' to be less sensitive?

Dont pounce on me, am learning here...

I can easily see that the amount of light reaching the sensor is a function of shutter/aperture combination. But am confused after that. I thought sensor reacts to the available light based on what ISO is set.
Thx...

The ISO set determines the analog gain applied to the signal that resulted after photons are captured in the photo-site.

545

EOS Bodies - For Stills / Re: ISO 50

« on: January 22, 2013, 01:32:02 AM »

I know there are a multitude of factors affecting the process in shooting in the 5D Mark III's expanded ISO 50;SNR, DR, electronics, physics, optics, post work in software, brand model specifications and hype, third party testing...on and on.
Many of those topics can be throughly argued far beyond my understanding of technical issues at hand, but actually prove nothing but a great debate topic amongst experts.

I think the real test of whether shooting @ ISO 50 with the 5D MKIII is usable or not is to actually go out and to test it yourself, not endlessly beat it to death without a single exposure to evaluate.

Admittedly this was shot on an overcast day without glaring highlights, and I really wanted to accentuate the waterfall's movement, so I used a Circ. Polarizer not for reflections control, but to add 2+ stops exposure in addition to lowering the ISO to 50. I don't yet have a decent ND filter set to accomplish the same thing.

I was please enough with the results shot at Mission Trails Park Old Padre Dam, built around 1800 and of the first Spanish irrigation structures in California on the San Diego River. No it is not Old Man river, but yes we have a flowing river here!

Certainly open to opinions and criticism. Specs: 5D MKIII 17-40 f4, ISO 50, @ 5 sec , @f18

Nice picture. I like the brick wall and the flow of the water.

I have a few questions:

• Did you shoot raw or JPEG?
• Your file name has the word "edit" in it. What editing did you do?

I always shoot Full sized Raw for Landscapes @ 14 bit, Initially catalogue and process in 16-bit Adobe ProPhoto in Lightroom 4.3 using Process version 2012/ACR7, which in and off itself offers superior Highlight Recovery at any ISO. Image then is transferred to CS5 for further tonal edits, touchups, etc., and when it returns to Lightroom, it appends the filename with -edit.xxx. I export that to a JPEG for posting.
This is a real world workflow for producing printable imagery, not mind numbing photon counts in test images.

Pixel peepers might claim that the Lightroom and Photoshop edits obscures the Highlight clipping problems of  shooting @ ISO 50. Perhaps so, but I dont know of a real world digital workflow that doesn't include noise reduction, sharpening, and highlight/shadow clipping control to produce not only a workable and viewable, but printable image.
Does anybody print unprocessed RAW images out of the camera?

In the end isn't it all about getting the final product looking the the way you want it to appear?
A photographer let alone a lay viewer of a print is never going to say "Oh my God this image has 1/2 stop too little DR, he used HTP",  or "the sensor collected X Photons"
If one of my images had serious blown out highlights or shadow noise, and is therefore unacceptable, I simply wouldn't exhibit it.

Thanks. I am still learning the fine art of digital editing and so I am curious. I have LR 4.3 but not PS... As for pixel peeping or counting photons (or counting Half The Photons) I don't really care for that personally. To each their own...

546

EOS Bodies - For Stills / Re: ISO 50

« on: January 21, 2013, 09:49:50 PM »

I know there are a multitude of factors affecting the process in shooting in the 5D Mark III's expanded ISO 50;SNR, DR, electronics, physics, optics, post work in software, brand model specifications and hype, third party testing...on and on.
Many of those topics can be throughly argued far beyond my understanding of technical issues at hand, but actually prove nothing but a great debate topic amongst experts.

I think the real test of whether shooting @ ISO 50 with the 5D MKIII is usable or not is to actually go out and to test it yourself, not endlessly beat it to death without a single exposure to evaluate.

Admittedly this was shot on an overcast day without glaring highlights, and I really wanted to accentuate the waterfall's movement, so I used a Circ. Polarizer not for reflections control, but to add 2+ stops exposure in addition to lowering the ISO to 50. I don't yet have a decent ND filter set to accomplish the same thing.

I was please enough with the results shot at Mission Trails Park Old Padre Dam, built around 1800 and of the first Spanish irrigation structures in California on the San Diego River. No it is not Old Man river, but yes we have a flowing river here!

Certainly open to opinions and criticism. Specs: 5D MKIII 17-40 f4, ISO 50, @ 5 sec , @f18

Nice picture. I like the brick wall and the flow of the water.

I have a few questions:

• Did you shoot raw or JPEG?
• Your file name has the word "edit" in it. What editing did you do?

547

EOS Bodies - For Stills / Re: ISO 50

« on: January 21, 2013, 10:30:57 AM »

This is the best entertainment I've had in ages

LOL!

548

EOS Bodies - For Stills / Re: ISO 50

« on: January 21, 2013, 12:23:02 AM »

"Halves the amount of light"? Please correct me if I am wrong..... But there is nothing you can do with sensor settings or camera modes that will change the amount of light.... You can play with gain and linearity and mapping color depths, but the amount of light remains unchanged.  You can change the amount of light with shutter speed, aperture, or slapping on a neutral density filter, but not with the sensor.

Obviously a number of us are clueless. HTP stands for Half The Photons! Now how that happens in the sensor needs to be discovered...

And oh, just in case somebody takes my post at face value, here is the tag:
<SARCASM/>
 

549

EOS-M / Re: To buy M or not to buy M?

« on: January 20, 2013, 10:06:58 AM »

If your talking BMW then always M

Heres mine

BMW Z4M Coupe CSL wheels by tom_scott88, on Flickr

Sorry off-topic

For $799 I'd have picked it up in a second!
 

550

EOS Bodies - For Stills / Re: Potential upgrade from 7D

« on: January 20, 2013, 10:03:07 AM »

When the light is bad, what aperture setting do you use? Do you need to go below the 3.5/5.6 of your 15-85? If so, try glass first. Like someone said earlier, if you have the dough, go for the 5D3. You can shoot at 12.8K ISO and get decent pictures.

551

5D MK III Sample Images / Re: Sunrise

« on: January 20, 2013, 09:53:32 AM »

Yes, lovely shot!

552

Portrait / Re: We, The Photographers......Self Portaits..a Who's Who on CR

« on: January 19, 2013, 10:54:34 AM »

Ha! It took me a few seconds to figure out what I was looking at! Pretty neat.

WOW...it took me quite a bit longer than a few seconds to figure that out...I looked at it last night ...and thought (what are they talking about???...but the thought kept niggling at me.....)......it sooooo looks like a crushed can of coke.
Quite marvelous!
[/quote]
+100,000,000
Lovely concept and execution.

553

EOS Bodies - For Stills / Re: Request for Advice: 5D3 AF issues nightphotography

« on: January 19, 2013, 10:50:11 AM »

AF on Jupiter, seriously? 

Oh yes, it does! I was focussing to infinity before shooting star trails and it works great!

554

Animal Kingdom / Re: Show your Bird Portraits

« on: January 19, 2013, 05:23:40 AM »

A Pair.

Anand, lovely pictures.

555

Animal Kingdom / Re: Show your Bird Portraits

« on: January 19, 2013, 05:21:41 AM »

My personal favorite bird..the Peregrine Falcon..only the second time I've seen one of these..just wonderful


Peregrine Falcon by Revup67, on Flickr

Fantastic! I love the shot.