Post subject: Re: NASA and Space general conspiracy discussions
Posted: Sat Feb 06, 2016 6:43 pm
FLAT STANLEY
Club Captain
Joined: Nov 09 2015 Posts: 829
tigerman1231 wrote:Sums it up perfectly which is the exact point i have been making through this entire thread only to suffer personal attacks.... Some people believe what they are told and others go on facts that they have concluded themselves. I'm glad i'm the latter of the two.
Post subject: Re: NASA and Space general conspiracy discussions
Posted: Sat Feb 06, 2016 6:46 pm
Stand-Offish
Club Coach
Joined: Feb 18 2006 Posts: 18610 Location: Somewhere in Bonny Donny (Twinned with Krakatoa in 1883).
tigerman1231 wrote:Sums it up perfectly which is the exact point i have been making through this entire thread only to suffer personal attacks.... Some people believe what they are told and others go on facts that they have concluded themselves. I'm glad i'm the latter of the two.
You do know that what you conclude yourself doesn't constitute a fact? I would describe that as your conclusion.
War does not determine who is right - only who is left.
Thank God I'm an atheist.
Last edited by Stand-Offish on Sat Feb 06, 2016 6:48 pm, edited 1 time in total.
Post subject: Re: NASA and Space general conspiracy discussions
Posted: Sat Feb 06, 2016 6:46 pm
Mugwump
Administrator
Joined: Dec 05 2001 Posts: 25122 Location: Aleph Green
The thing to remember about Apollo is that from the moment the Saturn V rocket left the launch pad right up to "splash down" - the flow of information was controlled solely by NASA. Which is a military organisation in all but name.
Now, if you are an adherent of Science and you DON'T hear alarm bells reading the above statement there is a very serious disconnect somewhere.
Philosophically speaking, "Science" & "Authority" are about as far apart on the spectrum as you can get. Yet today the two words have all but become synonymous. I propose that this is a VERY BAD thing. It always has been. It always will be.
Returning to the issue of the photographs - I tend not to spend too much time on the question of shadows. Whilst it is true that there are some clearly ludicrous examples which can only be fakes - in many cases the question can become mired in complexity and ultimately nonproductive.
IMO, there are far more vulnerable regions where the photographic evidence can be attacked - such as visible light-intensity falloff which simply cannot be explained by anything other than a close light source.
Then there is the issue of image DETAIL. Our eyes are keyed to sensing and interpreting minute changes in light and shadow. The interaction of both in ways our brains are hard-coded to be more or less receptive to is what makes a good or bad photograph.
We intuitively understand what takes place at both ends of the process of sensing and interpreting. But the precise mechanism of transformation is still a bit of a mystery.
It's the reason for arguably the most common mistake all photographers make - including pros. Anyone who has ever picked up a camera will recall seeing some absolutely stunning interplay of light and shadow, grabbing the camera and pressing the shutter.
Breathless with anticipation they download the image into Adobe RAW/Capture One only to notice that either they've blown out the highlights (overexposed) or the shadows (underexposed) and the image looks nothing like what they remember.
They have just run into the problem of "tonal" or "dynamic range". You see, whilst the human eye can (in certain circumstances) differentiate up to fifteen stops of light intensity - cameras are less able to cope with variation.
Imagine a scale of 1-20 with complete darkness at 1 and unbearable brightness sitting at the other end. Any sensor (whether it be biological or machine) which could differentiate all 20 levels at the same time could be said to see EVERYTHING.
A sensor which can detect 15 consecutive levels is still pretty effective - but given that it will still miss five a decision must be made on which end of the scale you plan to cover. If you are expecting a bright photograph then you would logically position the low end of the range at the 5th level so that you capture everything up to twenty. Providing light intensity stays between 5 and 20 you will record everything in perfect clarity. But should ANY part of the scene fall below 5 (and thus outside your 15-stop recording range) it will appear completely black. Underexposed. A silhouette. Conversely, should you be expecting a dark image and you begin at position 1 right up to 15 - anything which is brighter than 15 will appear completely white. Overexposed.
Digital/film cameras are almost always far worse at coping with varying light intensity than the human eye. Many digital cameras struggle coping with a mere SIX STOPS difference. Film cameras (such as the Hasselblad) are better. But they are by no means perfect.
Which is a MAJOR PROBLEM when you are in an ultra-high contrast environment such as the moon where there is no atmosphere to soften direct sunlight and fill in the shadows.
Indeed, as environments go the Moon must ultimately be rated as a NIGHTMARE by even the most experienced of photographers.
How can you take a photograph in direct sunlight without blowing out the highlights and/or underexposing the shadow regions? The answer is - YOU CAN'T without the use of supplementary light sources (fill flash) and/or reflectors. Yet time and time again we see Apollo photos in which BOTH regions are perfectly exposed.
It's hard enough doing this is direct sunlight on EARTH where you have an atmosphere scattering light which can be pulled in as fill and highly reflective surfaces which can also serve this purpose.
And bear in mind that this film was rated 160ASA. That's PITIFUL by today's high ISO standards.
Now remember that these guys were not pro photographers. They were using arguably one of the most difficult cameras in the world to operate (even though it delivers superb optical results) - made even more so by the removal of the viewfinder and the astronauts limited field of vision.
Post subject: Re: NASA and Space general conspiracy discussions
Posted: Sat Feb 06, 2016 6:55 pm
TheButcher
International Board Member
Joined: Jul 13 2003 Posts: 5594
tigerman1231 wrote:Some people believe what they are told and others go on facts that they have concluded themselves. I'm glad i'm the latter of the two.
Facts are things that are proven or known to be true. You don't conclude a fact, a fact is something that is true and proven to be so. The moon landing hoax people have never proven anything that they say. Every single argument put forward has a counter argument based on fact. If moon truthers 'facts' are truly facts, then they'd stand up to scrutiny and be accepted. They don't stand up to scrutiny, unfortunately. As for people believing what they are told, moon truthers are the worst culprits for this. They read books and articles online written by like-minded individuals, and rather than be honest about 'researching' a topic and sticking to a rigorous method of evaluation that would cut out any potential bias. They just read and formulate ideas that conform or seem to strengthen their own position. What they should be doing is trying to prove themselves wrong. Once they get to the stage of being unable to do that they should pass it onto all and sundry to try and do so. If it stands up after that, then you will probably have an actual fact.
Saying something is true doesn't make it so. The weight of evidence is heavily against Moon truthers.
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Post subject: Re: NASA and Space general conspiracy discussions
Posted: Sat Feb 06, 2016 7:07 pm
Mugwump
Administrator
Joined: Dec 05 2001 Posts: 25122 Location: Aleph Green
The problem of "dynamic range" which leads to overexposed/underexposed photographs has been addressed in the digital age with the use of software and exposure "bracketing".
Basically you take the same shot six or seven times - each at a different f/stop. That way you record all the detail in the shadows and highlights spread across the series.
You then stack the series, one image on top of the other, in software such as Adobe Photoshop and blend them into a single file which is perfectly exposed.
This is called "High Dynamic Range" photography. Personally I think it looks too fantastic. But this is purely an aesthetic judgement.
Post subject: Re: NASA and Space general conspiracy discussions
Posted: Sat Feb 06, 2016 7:13 pm
tigerman1231
International Star
Joined: Sep 03 2013 Posts: 278
TheButcher wrote:Facts are things that are proven or known to be true. You don't conclude a fact, a fact is something that is true and proven to be so. The moon landing hoax people have never proven anything that they say. Every single argument put forward has a counter argument based on fact. If moon truthers 'facts' are truly facts, then they'd stand up to scrutiny and be accepted. They don't stand up to scrutiny, unfortunately. As for people believing what they are told, moon truthers are the worst culprits for this. They read books and articles online written by like-minded individuals, and rather than be honest about 'researching' a topic and sticking to a rigorous method of evaluation that would cut out any potential bias. They just read and formulate ideas that conform or seem to strengthen their own position. What they should be doing is trying to prove themselves wrong. Once they get to the stage of being unable to do that they should pass it onto all and sundry to try and do so. If it stands up after that, then you will probably have an actual fact.
Saying something is true doesn't make it so. The weight of evidence is heavily against Moon truthers.
That is my point you say man went to the moon FACT? But were you there yourself and see it with your own two eyes to conclude that it is FACT to yourself? You are saying it is FACT because you have been told it is FACT. Now that is a FACT
Post subject: Re: NASA and Space general conspiracy discussions
Posted: Sat Feb 06, 2016 7:34 pm
Mugwump
Administrator
Joined: Dec 05 2001 Posts: 25122 Location: Aleph Green
I blame much of what we see in this thread on the school system. From the outset kids are taught obedience to authority with individuality discouraged at each and every opportunity.
Time and time again we see people deferring to the opinions of "experts" without ever so much as questioning whether the reasons for doing so are justified.
If NASA says the lunar photographs are correct then they are correct. It doesn't matter that by saying so they have completely ignored some fundamental discrepancies with the Laws of Physics as we understand them. In such cases NASA is right and the Laws of Physics are wrong.
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