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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 10 Nov 2017 (Friday) 08:21
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Zoom lens with Internal Focusing

 
birderman
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Nov 10, 2017 08:21 |  #1

Can anyone advise on what zoom lenses are available to replace 18-55 kit lens but with Internal Focusing and if possible non-extending zoom - budget not yet decided as I wish to see what is actually available - Reason is I am looking for something to use square ND Filter system.

Currently I believe Sigma do a couple 17-50 and a 17-70.

It may be an advantage to consider a wider aperture like 2.8 (but this is only secondary requirement)

Reviews on suggested lens would be helpful


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Left ­ Handed ­ Brisket
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Nov 10, 2017 08:56 |  #2

It's been five years since I have owned this lens, but I think this one qualifies.

https://photography-on-the.net …/showthread.php​?t=1488436


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MalVeauX
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Nov 10, 2017 09:06 |  #3

birderman wrote in post #18493297 (external link)
Can anyone advise on what zoom lenses are available to replace 18-55 kit lens but with Internal Focusing and if possible non-extending zoom - budget not yet decided as I wish to see what is actually available - Reason is I am looking for something to use square ND Filter system.

Currently I believe Sigma do a couple 17-50 and a 17-70.

It may be an advantage to consider a wider aperture like 2.8 (but this is only secondary requirement)

Reviews on suggested lens would be helpful

All the zooms that are wide to telephoto will have extending barrels as you move through the focal range.

A 70-200 has internal focal-range zoom and internal focus, but is all telephoto, not wide.

So really you'll only be looking at medium range zooms (like the 17-50, 15~85, etc flavors) that all have extending barrels through the zoom range, but many do not have rotating front elements

Very best,


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Pigpen101
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Nov 10, 2017 09:22 |  #4

Left Handed Brisket wrote in post #18493319 (external link)
It's been five years since I have owned this lens, but I think this one qualifies.

https://photography-on-the.net …/showthread.php​?t=1488436

For $175, you really can't go wrong!

If you want IS, this Sigma is a decent lens. I own it and have few complaints.

https://www.bhphotovid​eo.com …EX_DC.html#cust​omerReview (external link)




  
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Bassat
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Nov 10, 2017 11:45 |  #5

MalVeauX wrote in post #18493326 (external link)
All the zooms that are wide to telephoto will have extending barrels as you move through the focal range.

A 70-200 has internal focal-range zoom and internal focus, but is all telephoto, not wide.

So really you'll only be looking at medium range zooms (like the 17-50, 15~85, etc flavors) that all have extending barrels through the zoom range, but many do not have rotating front elements

Very best,

Pretty sure the 17-40 is internal focus and zoom.


Tom

  
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Bassat
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Nov 10, 2017 11:47 |  #6

Left Handed Brisket wrote in post #18493319 (external link)
It's been five years since I have owned this lens, but I think this one qualifies.

https://photography-on-the.net …/showthread.php​?t=1488436

Thank you. And yes it is internal focus. Does extend while zooming, though. Take a look at PZ.de. That Tamron 17-50 is sharper than the Sigma 17-50 OS. According to TDP, it focuses more accurately, and more consistently, too.


Tom

  
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MalVeauX
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Nov 10, 2017 12:23 |  #7

Bassat wrote in post #18493408 (external link)
Pretty sure the 17-40 is internal focus and zoom.

That is true.

Certainly could be used on an APS-C in place of an 18-55 for example and provide no extension of barrel and internal focusing. Though it probably will be softer than an 18-55 STM even when stopped down.

Very best,


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Bassat
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Nov 10, 2017 12:35 |  #8

MalVeauX wrote in post #18493440 (external link)
That is true.

Certainly could be used on an APS-C in place of an 18-55 for example and provide no extension of barrel and internal focusing. Though it probably will be softer than an 18-55 STM even when stopped down.

Very best,

I tried the 17-40 on my 80D. The 18-55 STM was better, with better range, and IS.


Tom

  
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ejenner
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Nov 10, 2017 21:05 |  #9

I replaced my kit 18-55 with the 17-40 back in the day. But it was an older version of the 18-55 (I think VII), not the STM. The main reasons were the same as yours but also flare resistance. The 18-55 would flare like crazy, while the 17-40 is extremely flare resistant.

But likely the extending zoom will not be as big of a deal as the non-rotating front element, so the other options may well be better and cheaper.


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Zoom lens with Internal Focusing
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