Don't like the WHITE on your L?

jpr2 · Feb 19, 2008

marsbar said:
I've thought the same thing. White really stands out, turns heads, I
go out for simple walk along sea wall, and at least get a few
questions. I rahter have it black, once made a PS'ed image of my
70-200, just to see what it might look like:

I kinda like it

what a simple, and... SPLENDID idea - and also what a beauty (almost,
it would be a full beauty, if not for that ugly white strip up-front next
to the red ring; speaking ow which,
why did you left the red to stand out?);

also, I very much like that you've put it in matte, and not shinning

congratulations,
jpr2

marsbar · Feb 19, 2008

jpr2 said:
why did you left the red to stand out?

It was just a test, I just wanted an idea of how it might look if I ever bothered to paint it. Yes I do think the silver ring on the top is a bit ugly.

On a side note, ever pulled back the rubber on a 70-200mm zoom ring? It's black! Guess the 70-200 is just like Michael Jackson

--

jpr2 · Feb 19, 2008

marsbar said:
On a side note, ever pulled back the rubber on a 70-200mm zoom ring?
It's black! Guess the 70-200 is just like Michael Jackson

indeed it is! the same on my 300/4L IS - under rubbers it is all black,
so I think all L-s are just Jacksons

jpr2

kjuh · Feb 19, 2008

MAN, even in the points you are right, you are wrong. LOL

jpr2 said:
jpr2 said:

... and don't tell me you never wondered as a little kid why bonnets
of black cars were so much hotter that white ones in sunshine.

Click to expand...

it is not as much important to dwell on such surface temperatures,
but rather on insides, and after a while interiors of two exactly
identical
copies of the same car model, one black and white, would be of the
same temperature,

You are wrong. Dynamical equilibrium temperature for the same sunlight will be significantly higher for the black car and the temperatures will stabilize in different levels. Search google or encyclopedia for this.

jpr2 said:
however, the black one will cool quicker - again
in exactly the same circumstances,

Funnily, you are right here, but wasn't rapid warming and cooling and thus uneven expansion just what we wanted to avoid using white colour instead of black?

You just proved Canon right!

jpr2 said:
jpr2 said:

...or that you didn't notice that black paper catches fire fastest
when you were playing with a magnifying glass.

Click to expand...

false again, as it has no bearing on the subject at hand - to catch fire
these temperatures would need to be at least in several hundreds
degrees region - at such conditions there will be no lens, no body,
nor even any photographer left to conduct some more testing

It does have a bearing. Don't you get it? The black paper gets hotter than white given the same amount of sunlight energy through the magnifying glass. The temperatures are of course different but the principle is the same.

Be man enough now to at least post "OK" or something. It's not a big deal

Usually people just disappear like they never read the post...

jpr2 said:
jpr2 said:

Secondary or primary reason, white is an engineering solution, and the
benefit can be felt by hand.

Click to expand...

and of course ONLY canonites are smart enough to realize this?

Maybe the others don't want their lenses mixed with Canons plus that they think the effect is not important enough to change the appearance of their lenses.

Skip M · Feb 19, 2008

psebi said:
In the end it's just a matter of taste. I have no problem with white
on a lens.
I prefere black on a car. Others might prefer white or blue or red.
It's just about taste.

Not necessarily. Like was mentioned, a lot of uninformed keepers of gates equate white with "pro" and won't allow photographers lugging white lenses around to photograph, or will charge same to do so.

Also, my wife and I are wedding photographers, and we've found that the white lenses attract an inordinate amount of attention when we are trying to be inconspicuous. Aesthetically, I have no problem with white, and I understand the practical reasons for some of the lenses being white, but sometimes I wish my 70-200 was black.

--
Skip M
http://www.shadowcatcherimagery.com
http://www.pbase.com/skipm
'Living in the heart of a dream, in the Promised Land!'
John Stewart

psebi · Feb 19, 2008

Well, at least it is in the same color tone as the bride's dress.

Skip M said:
Also, my wife and I are wedding photographers, and we've found that
the white lenses attract an inordinate amount of attention when we
are trying to be inconspicuous. Aesthetically, I have no problem
with white, and I understand the practical reasons for some of the
lenses being white, but sometimes I wish my 70-200 was black.

--
Skip M
http://www.shadowcatcherimagery.com
http://www.pbase.com/skipm
'Living in the heart of a dream, in the Promised Land!'
John Stewart

--
opinions are like @$$holes: everybody's got one and most of them stink
http://sebbastian.blogspot.com

Knackerman · Feb 19, 2008

kjuh said:
kjuh said:

and of course ONLY canonites are smart enough to realize this?

Click to expand...

Maybe the others don't want their lenses mixed with Canons plus that
they think the effect is not important enough to change the
appearance of their lenses.

Actually, the Nkon 70-200 f2.8 VR can be had in light grey.

I don't know Nikon well enough to tell whether you can get other lenses in light grey.

....and I don't know enough about optics and lens physics to give a good reason why other manufacturers does not provide white lenses and what they are made of.

I know though, that Canon uses somewhat "exotic glass" in it's L's, the focus plane is critical in the long lenses, so any effort to make the lens more "environment resistant" is welcome by me.

Regards
K

--
http://znapper.ath.cx/

kjuh · Feb 19, 2008

js20D said:
The white colour being a marketing gimmick and really a SECONDARY
matter.

I think Canon must be laughing their heads off. 'come on, all those
white lenses lined up at the side of the fields, you cannot get
better publicity. I am sure they have patented it was well.

Now that there's more or less only white lenses at the side of the field, black ones stand out and get publicity. So it has turned upside down. The new Nikon tele's are frightenigly good in specs... (I'm a Canon man)

js20D said:
THIS IS PRIMARILY A MARKETING TOOL!

It is funny how you get engineering talk in some of that marketing
material to justify a belated market strategy. Anything half
scientific will do.

Well, for the rest of the world it has been mainstream science for at least 200 years.

Ever thought why space shuttles and other space vehicles are white? Even the commies made them white...

Marketing gimmick?

Or why leaves are pretty dark and ice is white? Mother nature's marketing gimmick?

Sometimes falling into thinking mode helps.

js20D said:
Dilbert comes to mind. Funny

Yeah, sure.

As long as camera makers tell you to keep your camera away from direct sunlight I see no reason to make lenses the worst possible color, if only temperature management is considered.

You can argue that the white/black effect is not of paramount importance but the science is there 100% even if most of the benefit would eventually be in product recognition.

Tbedna1 · Feb 19, 2008

Voyager13b said:
I like my white lenses. Could you come up with a product that turns
my camera bodies white, and keeps them clean?

--
Voyager

I could certainly try. My main goal right now is to attack the lenses. I may try camera bodies later on.

Tbedna1 · Feb 19, 2008

jpr2 said:
Tbedna1 said:

Thought it would get more attention in this forum than the 40D forum...
http://forums.dpreview.com/forums/read.asp?forum=1019&message=26807278

Click to expand...

looks like you've been mistaken - the other thread seems to move
along,
while this is dormant; but anyway - what are your ideas, broadly
speaking?

jpr2

My ideas..... Actually, this website (www.lenscoat.com) is very similar to what I was thinking, but it won't be nearly as expensive, and it won't be neoprene. That stuff is hideous. It will look like it's actually part of the lens and not a "sock" "cover".

jamesdak · Feb 19, 2008

and at an economical price?
--
Long live the HMS Beagle
Critiques always welcome!

fred44 · Feb 19, 2008

Who said canon is ....

see these :

http://www.nikonimaging.com/global/products/lens/af/telephoto/af-s_300mmf_4d_if/index.htm

http://www.nikonimaging.com/global/products/lens/af/zoom/af-s_zoom28-70mmf_28d_if/index.htm

http://www.nikonimaging.com/global/products/lens/af/zoom/af-s_vr_zoom70-200mmf_28g_if/index.htm

fred44 · Feb 19, 2008

Who said canon is ....

see these :

http://www.nikonimaging.com/global/products/lens/af/telephoto/af-s_300mmf_4d_if/index.htm

http://www.nikonimaging.com/global/products/lens/af/zoom/af-s_zoom28-70mmf_28d_if/index.htm

http://www.nikonimaging.com/global/products/lens/af/zoom/af-s_vr_zoom70-200mmf_28g_if/index.htm

eelnoraa · Feb 19, 2008

To me, just the amount of attention you get with a white barrel. The black magic drain pipe get much less attention then the white 70-200F2.8L

eel

eelnoraa · Feb 19, 2008

Sure white may make a differences, but I am sure it is very small. Other brand also make equivalent lens in black and doesn't affect image quality.

Just like the "L" label, a lot of it is marketing gimic. Canon just called their better made lens the L series. With other brand, they do make lens with equivalent quality, just they didn't call it a separate name.

eel

jpr2 · Feb 19, 2008

eelnoraa said:
To me, just the amount of attention you get with a white barrel. The
black magic drain pipe get much less attention then the white
70-200F2.8L

every girl with well rounded calves knows that black stockings make them
to look (and hence to be) a lot slimmer

jpr2

jpr2 · Feb 19, 2008

as a scientist you of course know, that almost always half-truths
are making much more chaos, than just plain old falsehoods - at least
so it seems from your's tangential arguments;

anyway - this is an puzzle which should not pose any problems to you
to solve with a rocket speed hopefully:

just take an aluminum cylinder 86mm in diameter, and 35cm long;
with it's walls uniformly 3mm this;
and with both ends just closed by two circles of the same material,

and the same wall thickness - so there is a give quantity of air trapped
within;

now, place it into a thermostat, set to an uniform 40 deg. Celsius;
considering that air was trapped at 20 deg. Celsius;

take a coefficient of linear expansion of aluminum and air in the range

from 20 to 40 deg. Celsius;

and calculate by which percentages (you can also give it in absolute
numbers) [a] diameter of cylinder will increase, and what will be
it expanded length at 40 deg. Celsius.

being a Rocket Scientist you've no doubt realized by now, that a cylinder
is a simplified model of a lens, and also the changing of units from SI
to any other system of your's choice will not pose unsurmountable
obstacle;

good luck, and do not forget pls.
to tell us the results,
jpr2

filmluvr · Feb 19, 2008

kjuh said:
You are wrong. Dynamical equilibrium temperature for the same
sunlight will be significantly higher for the black car

The need to resort to analogy always means your opponent has no factual basis applicable to the subject under discussion.

Jack

--
http://jackandkelly.zenfolio.com/

kjuh · Feb 19, 2008

jpr2 said:
as a scientist you of course know, that almost always half-truths
are making much more chaos, than just plain old falsehoods - at least
so it seems from your's tangential arguments;

Just as I expected. You don't comment in any way your falsified arguments but stop making any factual statements and just resort to name calling... gee.

So, do you continue to claim that black and white cars, otherwise identical will reach same temperature subjected to same sunlight, or did you understand the thing I tried to explain? Yes or No thank you.

Do you think the same apply to other objects, like lenses? Like black and white lens, otherwise identical.

jpr2 said:
anyway - this is an puzzle which should not pose any problems to you
to solve with a rocket speed hopefully:

just take an aluminum cylinder 86mm in diameter, and 35cm long;

with it's walls uniformly 3mm this;

and with both ends just closed by two circles of the same material,

and the same wall thickness - so there is a give quantity of air trapped
within;

now, place it into a thermostat, set to an uniform 40 deg. Celsius;

considering that air was trapped at 20 deg. Celsius;

take a coefficient of linear expansion of aluminum and air in the

range
from 20 to 40 deg. Celsius;

and calculate by which percentages (you can also give it in absolute
numbers) [a] diameter of cylinder will increase, and what will be
it expanded length at 40 deg. Celsius.

being a Rocket Scientist you've no doubt realized by now, that a
cylinder
is a simplified model of a lens, and also the changing of units from SI
to any other system of your's choice will not pose unsurmountable
obstacle;

Woohaa.

Your "model" totally fails to simulate real life lens barrel warming because it does not contain radiation (sunlight) and does not include the cover color, so I see no point of doing your excercise. It is not particularly interesting puzzle in itself anyway.

What's your point? To prove that aluminium barrel expands when heated?

I tend to believe that you still don't understand the difference between a white and a black barrel warmed up in an oven (as I take "in a thermostat" meaning in your example) and warmed up by sunlight.

kjuh · Feb 19, 2008

filmluvr said:
The need to resort to analogy always means your opponent has no
factual basis applicable to the subject under discussion.

...or that you did not understand the factual basis and your opponent is explaining it in the terms he thinks you understand. ;-)

Of course the catch is that the analogy must be valid.

Don't like the WHITE on your L?

Forum Pro

Leading Member

Forum Pro

Well-known member

Veteran Member

Leading Member

Senior Member

Well-known member

Member

Member

Veteran Member

Member

Member

Forum Enthusiast

Forum Enthusiast

Forum Pro

Forum Pro

Veteran Member

Well-known member

Well-known member

Similar threads

Keyboard shortcuts