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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 19 Nov 2012 (Monday) 23:20
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Canon 24-70mm F2.8 i vs ii

 
cdifoto
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Nov 20, 2012 11:56 |  #16

mikeinctown wrote in post #15268309 (external link)
Um, are you implying that plastic has some sort of magical warming properties? Sorry, but they both get the same temperature as the outside air. One may "feel" warmer, but it doesn't make it true.

I'd have the say the same thing about plastic when you drop it. A sturdy plastic will most likely crack as well. If it can bend then there is a good chance that it will distort in heat and cold, which wouldn't necessarily be good for photos and sharpness.

Don't be ridiculous. It's known that some materials absorb the surrounding temperature more than others. How else would a coat keep you warm? How is "feeling warmer" any different from "being warmer?"

Yes, not all plastics are created equal nor are all drops. Hence my use of the word "can" and not "will." We have to trust the lens designers to provide us with a plastic that has a favorable characteristic for optics - the same way we trusted them for the metals. Metals expand and contract with temperature changes too. Heck not all metals are even created equally.


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ed ­ rader
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Nov 20, 2012 11:58 as a reply to  @ cdifoto's post |  #17

arguing against the new lens on build quality is just ridiculous.


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Nov 20, 2012 12:00 |  #18

I was also never fully happy with the 24-70L that's why I got the 24-70Lii and so far I have no regrets.


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cdifoto
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Nov 20, 2012 12:02 |  #19

ed rader wrote in post #15268344 (external link)
arguing against the new lens on build quality is just ridiculous.

Yeah as if half these people would even break an EF-S kit lens... :confused:


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hhuy888
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Nov 20, 2012 12:08 |  #20

cdifoto wrote in post #15266953 (external link)
The used price skyrocketed because of the insane price of the Mark II.

I agree.
This is the first time I ever see mark I (of any lenses or cameras) actually goes up in price when mark II is out.

I suspect eventially, brick II goes down in price, then brick I price will sink below 1K.


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mikeinctown
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Nov 20, 2012 12:20 |  #21

cdifoto wrote in post #15268337 (external link)
Don't be ridiculous. It's known that some materials absorb the surrounding temperature more than others. How else would a coat keep you warm? How is "feeling warmer" any different from "being warmer?"

Yes, not all plastics are created equal nor are all drops. Hence my use of the word "can" and not "will." We have to trust the lens designers to provide us with a plastic that has a favorable characteristic for optics - the same way we trusted them for the metals. Metals expand and contract with temperature changes too. Heck not all metals are even created equally.

A coat keeps you warm because of the insulating properties of the material in the coat, combines with trapped air and the heat from your body. A coat can also only keep you warm if it has enough insulation. A camera lens has no such heat source or Insulating properties. It *will* be the same temperature as the outside air. If it is 40* outside, both lenses will be 40* if they are outside.

Anyway, as said after me, if you drop it, it should go for a check up.




  
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Nov 20, 2012 12:37 |  #22

hhuy888 wrote in post #15268380 (external link)
I agree.
This is the first time I ever see mark I (of any lenses or cameras) actually goes up in price when mark II is out.

I suspect eventially, brick II goes down in price, then brick I price will sink below 1K.

Which is part of the reason I jumped on the MKII even I did. The opportunity to profit from the sale of my mark I pushed me to pull the trigger on the mark II


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Nov 20, 2012 14:07 |  #23

cdifoto wrote in post #15266953 (external link)
The used price skyrocketed because of the insane price of the Mark II.

Having just sold one, I would disagree with this. There are so many for sale now as people are upgrading, that its a buyers market in my opinion.


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RustyHammer
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Nov 20, 2012 18:34 |  #24

I went with the "middle ground" and got the Sigma 70-200mm f2.8 ex dg os hsm. I've shot with all flavors of 70-200's over the years and think at the Sigma 70-200mm f2.8 ex dg os hsm is as close as it gets to the Canon Mk II and at a huge discount as far as price goes. Still, if you have the coin, the Canon Mk II is the cat's meow!!!


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cdifoto
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Nov 20, 2012 19:07 |  #25

RustyHammer wrote in post #15269822 (external link)
I went with the "middle ground" and got the Sigma 70-200mm f2.8 ex dg os hsm. I've shot with all flavors of 70-200's over the years and think at the Sigma 70-200mm f2.8 ex dg os hsm is as close as it gets to the Canon Mk II and at a huge discount as far as price goes. Still, if you have the coin, the Canon Mk II is the cat's meow!!!

That's not even remotely relevant...


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Andrew_WOT
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Nov 20, 2012 21:03 |  #26

cdifoto wrote in post #15269947 (external link)
That's not even remotely relevant...

LOL, it's still a lens, right? :)




  
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cdifoto
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Nov 20, 2012 21:47 |  #27

Andrew_WOT wrote in post #15270407 (external link)
LOL, it's still a lens, right? :)

Yeah.

"Hmm...Canon 24-70 or Tamron 24-70...Canon 24-70 or Tamron 24-70...? Damn I can't decide! Screwit I'll get the 500mm f/4L instead."


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ccya965041
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Nov 20, 2012 22:18 |  #28

mikeinctown wrote in post #15268426 (external link)
A coat keeps you warm because of the insulating properties of the material in the coat, combines with trapped air and the heat from your body. A coat can also only keep you warm if it has enough insulation. A camera lens has no such heat source or Insulating properties. It *will* be the same temperature as the outside air. If it is 40* outside, both lenses will be 40* if they are outside.

Anyway, as said after me, if you drop it, it should go for a check up.

This is right,if they existed under the some temperature,the outside temperature of the lens should be the same.

However,we need to think about Heat Transfer for this.Metal are good conductor while plastic aren't,so metal will transfer heat faster than non-conductor(plastic).


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SiaoP
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Nov 20, 2012 22:25 |  #29

The used one is not 1400 used... Just get the mark I 24-70mm f/2.8

It is a very good lens and it's really cheap now. The new one is overpriced but it is very very sharp. I prefer the old zoom design with the very large hood throughout the range.


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hhuy888
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Nov 20, 2012 22:48 |  #30

convergent wrote in post #15268805 (external link)
Having just sold one, I would disagree with this. There are so many for sale now as people are upgrading, that its a buyers market in my opinion.

2 years ago I sold a mark I, still 5 months under warranty and spotless, only got 1K net for it. With that condition, I can sell for $1200-1300 easily now.
I would say it is seller's market for that lens right now.


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Canon 24-70mm F2.8 i vs ii
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