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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 29 Dec 2010 (Wednesday) 11:02
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Best standard-zoom constant aperture lens?

 
ShadowCaver
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Dec 29, 2010 18:16 |  #91

Mystery wrote in post #11537068 (external link)
Ahh thanks. Not that big of a deal really, I mean when you're snapping away in AF you don't really stop to manual focus right?

Seems like it would be faster to just take another pic if the AF misses, rather than turn to manual focus.

I guess I'll find out how important/useful the lack of the feature is once I get the lens. For now, I have no clue, just seems like it's not that big of a deal.

Not best example, but its mine... yesterday whilst out taking some [Ie: few hundred :o] shots of a spring [water version, not metal], I'd let the camera / lens AF first, and then I'd MF to get the composition, DOF, etc. that I was after. As mentioned above, that is one of the reasons why the Canon peaked above the others, for me.

lol as to the buyer's remorse... 'tis a bad buggery habit of mine; drives the woman crazy(er) :p . Research stuff to death, make a decision, and then [the bad part] continue to read more, always after that proverbial "best". ;)


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digital_AM
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Dec 29, 2010 18:26 |  #92

^ That's me exactly. Wish there was a way to cure it.




  
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niku2
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Dec 30, 2010 07:51 |  #93

Stamp wrote in post #11534853 (external link)
+1 for the Sigma. I had to micro adjust +8 with mine, nothing too bad.

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Hi! The face is not on the focus from what I see.
When you microadjust the lens, you make some tests? Because for zooms its difficult to make a good adjustment at all focal planes.
I recommend to send the lens in Service.




  
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Octobersown
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Dec 30, 2010 08:41 |  #94

I hate lens creep. It all started with my 28-135 kit lens. Now I think my 17-55 is starting to suffer from it. The Sigma has a lens lock which is nice but it probably doesn't need it since it's a lot tighter than the Canon to begin with. And I hate the plastic that the 17-55 uses, it feels like a toy. Thank god I don't have any dust issues yet. Love the IQ and AF but pretty much hate everything else about it.




  
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Mystery
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Dec 30, 2010 09:54 |  #95

Guys what is front focusing? And how can I tell if my lens suffers from it when I buy the Sigma?


Canon EOS T2i / 550D
Canon EF 24-70mm f/2.8 L (I)
Canon EF 50mm f/1.8
Canon EFS 18-55mm f/3.5-5.6
Canon EFS 55-250mm f/4-5.6

  
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Fligi7
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Dec 30, 2010 10:19 |  #96

Here are several links for AF Micro Adjustment explaining what it does and how to do it:

https://photography-on-the.net …highlight=af+mi​cro+adjust

http://www.kennewcombe​.com/AFmicroadjust.htm​l (external link)
http://jasonirons.com …justment-tool-for-lenses/ (external link)
http://www.northlight-images.co.uk …s3_af_micoadjus​tment.html (external link)
http://www.openphotogr​aphyforums.com/forums/​showthread.php?t=4708 (external link)




  
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Fligi7
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Dec 30, 2010 10:19 |  #97

niku2 wrote in post #11540292 (external link)
Hi! The face is not on the focus from what I see.
When you microadjust the lens, you make some tests? Because for zooms its difficult to make a good adjustment at all focal planes.
I recommend to send the lens in Service.

AF point may not have been on the face.




  
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watt100
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Dec 30, 2010 11:06 |  #98

niku2 wrote in post #11540292 (external link)
Hi! The face is not on the focus from what I see.
When you microadjust the lens, you make some tests? Because for zooms its difficult to make a good adjustment at all focal planes.
I recommend to send the lens in Service.

good point, some of these "microadjusts" seem to make focusing worse!




  
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Stamp
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Dec 30, 2010 11:50 |  #99

niku2 wrote in post #11540292 (external link)
Hi! The face is not on the focus from what I see.
When you microadjust the lens, you make some tests? Because for zooms its difficult to make a good adjustment at all focal planes.
I recommend to send the lens in Service.

You're exactly right. I noticed this after pixel peeping after reading this thread. I actually MA'ed again last night, and I noticed that at 50mm, it is a tiny bit different at 17mm, so I think I got it dialed in to be the best it can at both focal distances. I'll do a test here in just a minute.


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Stamp
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Dec 30, 2010 12:08 as a reply to  @ Stamp's post |  #100

Here are some shots from both focal extremes.

First one is 17mm. 100% photo is link below, SOOC RAW to JPEG, no sharpening/NR/nothing

Focus is on the "O" of the SONY in both shots.

http://www.stampphotog​raphics.com …s/Sharp%20Test%​2017mm.jpg (external link)

50mm
http://www.stampphotog​raphics.com …s/Sharp%20Test%​2050mm.jpg (external link)


1Ds Mark II, 5D Mark III, Canon AE1, Yashica Electro 35, Mamiya RB67, Yashica 124, some lenses with red rings on them, and some flashey things
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Mystery
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Dec 30, 2010 12:32 |  #101

Stamp wrote in post #11541788 (external link)
Here are some shots from both focal extremes.

First one is 17mm. 100% photo is link below, SOOC RAW to JPEG, no sharpening/NR/nothing

Focus is on the "O" of the SONY in both shots.

http://www.stampphotog​raphics.com …s/Sharp%20Test%​2017mm.jpg (external link)

50mm
http://www.stampphotog​raphics.com …s/Sharp%20Test%​2050mm.jpg (external link)

pretty damn sharp!


Canon EOS T2i / 550D
Canon EF 24-70mm f/2.8 L (I)
Canon EF 50mm f/1.8
Canon EFS 18-55mm f/3.5-5.6
Canon EFS 55-250mm f/4-5.6

  
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niku2
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Dec 31, 2010 03:10 as a reply to  @ Mystery's post |  #102

Ok, that looks good, but you testesd for close sujects. But if you shoot distant subjects, it will not be the same. There is the problem with the adjustment for zooms.
Make the test also in bright ligt without flash with some distant subjects.
Anyway, the adjustment for zooms its says that is better to do for 50mm in you case. But if it was me I will send to the service, because I owned the Tamron 17-50 and have the same problem - heavy front focus (needed 14 units for MA), it was not the same for all focal planes and I sale it because was without warranty.




  
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Best standard-zoom constant aperture lens?
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