Canon Community Canon Community
 


Reply
Esteemed Contributor
Posts: 4,889
Registered: ‎06-25-2014

Re: What is the difference between EF and EF-S lenses and what is STM?

TCampbell wrote:

 

If you use the 60Da to take "normal" terrestrial photos, you'll notice everything looks quite "warm".  You can back this off via white balance (of course you'd do this for every shot you take).  As such, the 60Da isn't well-suited for normal terrestrial photography, but it's fantastic for astro-imaging.


Wandering far OT (and admitting it), ...

 

I've always wondered why physicists and astronomers (and especially photographers) persist in referring to a red bias in an image as "warm". We all know that higher temperatures are correlated with bluer radiation and that, if anything, redder colors are generally associated with cooler objects. I suppose that the anomoly is entirely linguistic, deriving from the fact that fire is red and the sky and large bodies of water are blue. In truth, I have a great affection for linguistics, but I still confess to finding the usage a bit jarring.  Smiley Frustrated

Bob
Philadelphia, Pennsylvania USA
Esteemed Contributor
Posts: 3,800
Registered: ‎06-11-2013

Re: What is the difference between EF and EF-S lenses and what is STM?

Yes - for stars, the bluer the light, the hotter the star and the redder the light the cooler the color.   For emission nebulae, the colors tell us which elements are present in the gases (and read like a "bar code").

 

And yet for photography, we still refer to red as being "warm" and blue as being "cold".

 

 

Tim Campbell
5D III, 5D IV, 60Da
Esteemed Contributor
Posts: 4,889
Registered: ‎06-25-2014

Re: What is the difference between EF and EF-S lenses and what is STM?


@TCampbell wrote:

Yes - for stars, the bluer the light, the hotter the star and the redder the light the cooler the color.   For emission nebulae, the colors tell us which elements are present in the gases (and read like a "bar code").

 

And yet for photography, we still refer to red as being "warm" and blue as being "cold".


But when we talk about color temperature, we get it riight: bluer = a higher temperature.

Bob
Philadelphia, Pennsylvania USA
Highlighted
Respected Contributor
Posts: 1,861
Registered: ‎12-02-2012

Re: What is the difference between EF and EF-S lenses and what is STM?

Clearly you guys don't keep up with cartoons. If a character freezes, he turns blue, and indeed, ice is drawn as blue, ergo blue = cold. The entire Disney merchandising Goliath that is the Frozen movie observes this coloring convention for the youngsters. Elisa's ice dress is blue. Cartoon fires have a warm orange glow.

Seriously, though, no one on the street, not even most photographers or even scientists would look at a blue color palette at the paint counter and think "warm colors".
Scott

Canon 5d mk 4, Canon 6D, EF 70-200mm L f/2.8 IS mk2; EF 16-35 f/2.8 L mk. III; Sigma 35mm f/1.4 "Art" EF 100mm f/2.8L Macro; EF 85mm f/1.8; EF 1.4x extender mk. 3; EF 24-105 f/4 L; EF-S 17-55mm f/2.8 IS; 3x Phottix Mitros+ speedlites

Why do so many people say "FER-tographer"? Do they take "fertographs"?
powered by Lithium

LIKE US on Facebook FOLLOW US on Twitter WATCH US on YouTube CONNECT WITH US on Linkedin WATCH US on Vimeo FOLLOW US on Instagram SHOP CANON at the Canon Online Store
© Canon U.S.A., Inc.   |    Terms of Use   |    Privacy Statement