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FORUMS General Gear Talk Flash and Studio Lighting 
Thread started 14 Nov 2011 (Monday) 15:05
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TMR ­ Design
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Dec 14, 2011 09:42 |  #2596

aaron.dunlap wrote in post #13543255 (external link)
LOL! this is the best type of measurement for the quality of a camera. The level of disappointment. :-P

LOL, that's how I'm going to review gear from now on... according to the level of disappointment.


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FJ ­ LOVE
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Dec 14, 2011 09:43 |  #2597

Csae wrote in post #13542906 (external link)
I can honestly say i've never noticed it.

If DR is a concern, i'm doing an AEB... Studio iso100 again out of habit, since i know my fstops and lights by that, iso200 is easy to calculate if needed aslong as i start off with iso100.

If i'm doing a landscape where DR is a concern, i'll be doing an AEB.

Would anyone like to find the actual thread where this is discussed in length with the proper numbers? I don't remember anything about the DR being hosed, i wouldn't be surprised if you lost a little bit, but i remember it being iso160 is a iso200-1/3, iso125 is iso100+1/3, doing -1/3 gave better SNR t'ill about the iso2ks.

this guy is the one who wrote most of the believable stuff we were reading before, i'm pretty sure one of these links is what you are talking abvout

https://photography-on-the.net …light=DANIEL+BR​OWNING+iso

https://photography-on-the.net …light=DANIEL+BR​OWNING+iso


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Sheldon ­ N
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Dec 14, 2011 09:46 as a reply to  @ post 13543378 |  #2598

avidstarr wrote in post #13542580 (external link)
Any opinions on a 69 rota octa vs 74 octa indirect? im thinking the rota gives more spread with a hot spot, where as the 74 is a lesser spread with more even spread so you dont notice the hot spot. other than that, i think both gives good soft light. also i think setting up the indirect is easier than the rota. Just wanting some opinions as im in the market for one ^-^

Sylvester is supposed to be conducting an exhaustive test and posting the results for everyone.

windpig wrote in post #13542878 (external link)
You get hosed dynamic range wise using intermediate ISOs and a double whammy is when using the full stop + 1/3 ISOs (130, etc), which gives you the worst noise.

Yep, trading noise floor for top end highlight range. It's just a digital pull of the next highest ISO.

I turn off the 1/3 stop ISO's in my camera, primarily because I switch ISO a lot when shooting (non studio setting) and having 1/3 stops in there makes me spin the dial too much to get what I want.

All the ISO's are very good or decent, especially if you get the exposure right. I don't have a 5D II, so I'm not dealing with any banding in the shadows.

Michael O wrote in post #13542885 (external link)
Anyone know if the PCB 7" grids fit the Elinchrom 7" reflector?


Yep, they fit. I use them for my Eli grid reflector. Impact ones fit too.

TMR Design wrote in post #13543220 (external link)
I found an equal level of disappointment from both the D90 and 7D. I'll leave it at that. :cool:

ROFL! :)

TMR Design wrote in post #13543287 (external link)
Honestly, for me, the discussion isn't a brand discussion, it's just about bodies. I could care less if it's a Nikon, Sony or Canon. If it performs or outperforms another body, so be it.

We're always comparing and evaluating gear. That's all I'm doing.

Sounds like someone's about to be shooting the Sony A900 and Zeiss glass. It's the new hero. :)


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Csae
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Dec 14, 2011 09:47 |  #2599

Ah, those ring a bell but the one i was thinking of had like charts in it, real sci-fi stuff.

I'll have a go at em later, after i finish my work, sleep, shoot the plm.


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Dec 14, 2011 09:54 |  #2600

I think it is time that the Elinchrom group moves to Leica's....


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Dec 14, 2011 10:00 |  #2601

Michael O wrote in post #13542885 (external link)
Anyone know if the PCB 7" grids fit the Elinchrom 7" reflector?

although they will fit, i would advise against it, here are just a few reasons Eli and PCB don't mix ;)

ELECTROCHEMISTRY OF CORROSION

Jerome Kruger
The Johns Hopkins University
Baltimore, MD 21218, USA

(April, 2001)

IMAGE NOT FOUND
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Ulick R. Evans, the British scientist who is considered the "Father of Corrosion Science", has said that "Corrosion is largely an electrochemical phenomenon, [which] may be defined as destruction by electrochemical or chemical agencies...". Corrosion in an aqueous (external link) environment and in an atmospheric environment (which also involves thin aqueous layers) is an electrochemical process because corrosion involves the transfer (external link) of electrons (external link) between a metal surface and an aqueous electrolyte (external link) solution. It results from the overwhelming tendency of metals to react electrochemically with oxygen, water, and other substances in the aqueous environment. Fortunately, most useful metals react with the environment to form more or less protective films of corrosion reaction products that prevent the metals from going into solution as ions (external link).
While the term corrosion has in recent years been applied to all kinds of materials in all kinds of environments, this article will only consider the electrochemistry of corrosion of metals and alloys in aqueous solutions at ambient temperatures. Electrochemical corrosion occurring under such conditions is a major destructive process that results in such costly, unsightly, and destructive effects as the formation of rust and other corrosion products, the creation of the gaping holes or cracks in aircraft, automobiles, boats, gutters, screens, plumbing, and many other items constructed of every metal except gold.
Systems such as boiling water nuclear reactors involving aqueous solutions are also examples of electrochemical corrosion but will not be covered. This article will also not cover the non-electrochemical process termed high temperature oxidation (external link), a destructive process which is the exposure of a metal or alloy to high temperatures in a gaseous environment (usually including oxygen or gases with sulfur containing compounds) where much thicker layers of corrosion products are formed. However, it must be pointed out that if the high temperature oxidation process results in the formation of salt layers that melt at the high temperatures used, a difference in electrode potential (external link) between phases or heterogeneities in an alloy can lead to hot corrosion which has electrochemical features similar to that of the condensed aqueous films involved in atmospheric corrosion. This technologically important corrosion process leads to the failure of such applications as gas turbines, heat exchangers, and many others that operate at high temperatures.

Consequences of corrosion

Corrosion has many serious economic, health, safety, technological, and cultural consequences to our society.
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Economic effects

Studies in a number of countries have attempted to determine the national cost of corrosion. The most extensive of these studies was the one carried out in the United States in 1976 which found that the overall annual cost of metallic corrosion to the U.S. economy was $70 billion, or 4.2% of the gross national product. To get a feeling for the seriousness of this loss, we may compare it to another economic impact everyone is worried about – the importation of foreign crude oil, which cost $45 billion in 1977.
(DUPLICATE IMAGE)
Health effects

Recent years have seen an increasing use of metal prosthetic devices in the body, such as pins, plates, hip joints, pacemakers, and other implants. New alloys and better techniques of implantation have been developed, but corrosion continues to create problems. Examples include failures through broken connections in pacemakers, inflammation caused by corrosion products in the tissue around implants, and fracture of weight-bearing prosthetic devices. An example of the latter is the use of metallic hip joints, which can alleviate some of the problems of arthritic hips. The situation has improved in recent years, so that hip joints which were was at first limited to persons over 60 are now being used in younger persons, because they will last longer.
(DUPLICATE IMAGE)
Safety effects

An even more significant problem is corrosion of structures, which can result in severe injuries or even loss of life. Safety is compromised by corrosion contributing to failures of bridges, aircraft, automobiles, gas pipelines etc. – the whole complex of metal structures and devices that make up the modern world.
(DUPLICATE IMAGE)
Technological effects

The economic consequences of corrosion affect technology. A great deal of the development of new technology is held back by corrosion problems because materials are required to withstand, in many cases simultaneously, higher temperatures, higher pressures, and more highly corrosive environments. Corrosion problems that are less difficult to solve affect solar energy systems, which require alloys to withstand hot circulating heat transfer fluids for long periods of time, and geothermal systems, which require materials to withstand highly concentrated solutions of corrosive salts at high temperatures and pressures. Another example, the drilling for oil in the sea and on land, involves overcoming such corrosion problems as sulfide stress corrosion, microbiological corrosion, and the vast array of difficulties involved in working in the highly corrosive marine environment. In many of these instances, corrosion is a limiting factor preventing the development of economically or even technologically workable systems.
(DUPLICATE IMAGE)
Cultural effects

International concern was aroused by the disclosure of the serious deterioration of the artistically and culturally significant gilded bronze statues in Venice, Italy. Corrosive processes will accelerate the deterioration of precious artifacts such as those in Venice by the highly polluted environments that now are prevalent in most of the countries of the world. Likewise, inside the world's museums conservators and restorers labor to protect cultural treasures against the ravages of corrosion or to remove its traces from artistically or culturally important artifacts.

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Dec 14, 2011 10:01 |  #2602

Harleypugs wrote in post #13543478 (external link)
I think it is time that the Elinchrom group moves to Leica's....

WELL!

Was nice knowing you gents & that one lady.


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Dec 14, 2011 10:04 |  #2603

I think that one pic of Pi in a dress was photoshopped....


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avidstarr
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Dec 14, 2011 10:05 |  #2604

Ty Csae and TMR Design for you comments :D


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Dec 14, 2011 10:07 |  #2605

Harleypugs wrote in post #13543478 (external link)
I think it is time that the Elinchrom group moves to Leica's....

Leica owners are just rich PCB fanatics :lol:


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Dec 14, 2011 10:08 |  #2606

You know, one time i was thinking,

Man, we have some knowledgeable folk in this thread... They should charge admission... Then i realized that it costs a little bit of sanity to have to waddle through the posts to find the answers... and they're usually there.. somewhere between Pi being PP'd and the weekly crazy.


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Dec 14, 2011 10:12 |  #2607

Csae wrote in post #13543550 (external link)
You know, one time i was thinking,

Man, we have some knowledgeable folk in this thread... They should charge admission... Then i realized that it costs a little bit of sanity to have to waddle through the posts to find the answers... and they're usually there.. somewhere between Pi being PP'd and the weekly crazy.

joining the Eli thread is a rite of passage that not all are worthy of ;)


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Dec 14, 2011 10:17 |  #2608

Tell me about it....^^^^ I feel like I still sit at the kids table....


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Dec 14, 2011 10:20 |  #2609

FJ LOVE wrote in post #13543545 (external link)
Leica owners are just rich PCB fanatics :lol:

lol...I am thinking about selling my PCB parabolics....they make me feel guilty that I own them, but hang out here.


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Dec 14, 2011 10:20 |  #2610

Harleypugs wrote in post #13543588 (external link)
Tell me about it....^^^^ I feel like I still sit at the kids table....

nonsense, that maxi lite shot with the cigar put you right next to pi at the head of the table :lol:


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