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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 21 Apr 2013 (Sunday) 08:43
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135mm f/1.8 DG OS ART Next from Sigma?

 
FEChariot
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Feb 25, 2017 13:31 |  #121

MatthewK wrote in post #18284815 (external link)
It'd be awesome to have a 16-35 f/2.8 equivalent for APS-C. How difficult would it be for them to make the 10-22 into an f/2.8?

I am not sure, but I would settle for 10-18 if they could give me 2.8 at 10mm.


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Feb 25, 2017 16:32 |  #122

TeamSpeed wrote in post #18284761 (external link)
The 7d2 is one of the best astro bodies as tested by Clark... it has very low long exposure noise even beating out FF. Ultra wide is your lens selection and there are many options for that. What other non Canon equipment would you use to do this? For movement, you just get a tracker like everyone else.

Canon don't make a fast UWA for EF-S - so your argument doesn't hold there.

And their FF offering is now over 1-stop slower than the market.

It's not just astro, any low-light scenario now offers more creative options with Sigma;

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Feb 25, 2017 17:24 |  #123

I just need to get out of the canon kit now before I end up with 40oz ea lenses in my bag


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Feb 25, 2017 17:59 |  #124

While on the subject of comparing 135mm lenses in different threads, strange to me that this new SIGMA is not apochromatic. So it's a little faster than the 20 year old Canon, it is not up to scratch against the Zeiss.


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Feb 25, 2017 18:04 |  #125

CyberDyneSystems wrote in post #18285010 (external link)
While on the subject of comparing 135mm lenses in different threads, strange to me that this new SIGMA is not apochromatic. So it's a little faster than the 20 year old Canon, it is not up to scratch against the Zeiss.

Does it have any other exotic materials (Fluorite, ED etc)?


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Post edited over 2 years ago by Talley.
     
Feb 25, 2017 20:23 |  #126

This is what I'm looking at here with the 135 1.8 Art. Looking at the Sigma MTF charts then comparing to lens rentals MTF testing AND comparing how my own lenses perform I draw conclusions. My conclusion is look at the sigma 135 and 85 MTF in the image below... the 135 will be sharper than the 85 Art. The 85 Art has real testing by lens rentals to backup the sigma chart. The canon 135 actual mtf is beginning to look very weak now "for mtf charts".

I've also attached the 200 F2 as I consider this lens a benchmark lens. In my opinion based on what I'm seeing the 135 1.8 will be 200 F2 sharp and will be a super budget lens compared to the 200 F2.


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Post edited over 2 years ago by Talley.
     
Feb 25, 2017 20:27 |  #127

I also compare to this... using the howmuch blur tells you qty of blur not quality but does give you an idea of the differences... either of these lens will have only minor differences though it does tell you the 200 2.8 is losing steam. The 85 1.2 holds it's own and when given distance the 200 F2 will dominate. The 135 1.8 will be a subtle improvement over F2.

I love the limiter switch option too.

edit: it'll always be very hard to compare qty of blur from an 85 to a 135 to a 200 due to the compression differences... the tele lens will always look more blurier in the end.


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Post edited over 2 years ago by TeamSpeed. (3 edits in all)
     
Feb 25, 2017 23:01 |  #128

Since there are third party lenses one can use now for astro , if Canon come out with one now, it would not be innovation, it would be catch up. Now if they could come out with a sharp UWA zoom that was something like f1.4, like a 12-20 f1.4, that would interesting, and unlike anything yet made.


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Feb 25, 2017 23:19 |  #129

TeamSpeed wrote in post #18285191 (external link)
Since there are third party lenses one can use now for astro , if Canon come out with one now, it would not be innovation, it would be catch up. Now if they could come out with a sharp UWA zoom that was something like f1.4, like a 12-20 f1.4, that would interesting, and unlike anything yet made.

And would allow you to get shots you couldn't get with their current offering - hence you answered your own question..


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Feb 25, 2017 23:36 |  #130

TeamSpeed wrote in post #18285191 (external link)
Since there are third party lenses one can use now for astro , if Canon come out with one now, it would not be innovation, it would be catch up. Now if they could come out with a sharp UWA zoom that was something like f1.4, like a 12-20 f1.4, that would interesting, and unlike anything yet made.

I have no qualms with them playing catch up in the UWA theater but inovation would be cool too.


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Feb 25, 2017 23:37 |  #131

No I answered a question I didn't ask, because I don't shoot astro related shots. If I did there are already a body and lenses for that. Also I don't need that type of lens, it would just interesting if they made it. Sigma already makes a FF 12-24, but a canon FF fast and sharp lens in that general range would be good competition.


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Feb 26, 2017 00:25 |  #132

.

cwphoto wrote in post #18285201 (external link)
And would allow you to get shots you couldn't get with their current offering - hence you answered your own question..

What question had Team Speed asked? .What post was this question of his in?

.


"Your" and "you're" are different words with completely different meanings - please use the correct one.
"They're", "their", and "there" are different words with completely different meanings - please use the correct one.
"Fare" and "fair" are different words with completely different meanings - please use the correct one. The proper expression is "moot point", NOT "mute point".

  
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Post edited over 2 years ago by cwphoto.
     
Feb 26, 2017 01:00 |  #133

TeamSpeed wrote in post #18285215 (external link)
No I answered a question I didn't ask, because I don't shoot astro related shots. If I did there are already a body and lenses for that. Also I don't need that type of lens, it would just interesting if they made it. Sigma already makes a FF 12-24, but a canon FF fast and sharp lens in that general range would be good competition.

Sure you did:

TeamSpeed wrote in post #18285191 (external link)
Now if they could come out with a sharp UWA zoom that was something like f1.4, like a 12-20 f1.4, that would interesting, and unlike anything yet made.


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Feb 26, 2017 01:02 |  #134

Tom Reichner wrote in post #18285241 (external link)
.

What question had Team Speed asked? .What post was this question of his in?

.

This one, in this thread:

TeamSpeed wrote in post #18284586 (external link)
What can't you shoot today with canon because of something they didn't create for you?


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Feb 26, 2017 01:18 as a reply to  @ cwphoto's post |  #135

.

Thank you, C.W.

.


"Your" and "you're" are different words with completely different meanings - please use the correct one.
"They're", "their", and "there" are different words with completely different meanings - please use the correct one.
"Fare" and "fair" are different words with completely different meanings - please use the correct one. The proper expression is "moot point", NOT "mute point".

  
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