Approve the Cookies
This website uses cookies to improve your user experience. By using this site, you agree to our use of cookies and our Privacy Policy.
OK
Index  •   • New posts  •   • RTAT  •   • 'Best of'  •   • Gallery  •   • Gear  •   • Reviews
Guest
New posts  •   • RTAT  •   • 'Best of'  •   • Gallery  •   • Gear  •   • Reviews
Register to forums    Log in

 
FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 07 Aug 2011 (Sunday) 21:57
Search threadPrev/next
sponsored links
(this ad will go away when you log in as a registered member)

Canon 15-85mm help!!

 
Stone ­ 13
Goldmember
Avatar
1,690 posts
Likes: 8
Joined Aug 2009
Location: Huntersville, NC
     
Aug 11, 2011 19:01 |  #31

Generally, you don't need more than f5.6 with this lens and the resolving power is great:

IMAGE: http://farm7.static.flickr.com/6070/6033336925_da8df4b430_b.jpg
IMAGE LINK: http://www.flickr.com/​photos/kenkelly/603333​6925/  (external link)
The RFK Bridge (external link) by Ken Kelly (external link), on Flickr

100% crop

IMAGE: http://farm7.static.flickr.com/6121/6033381001_6f055f40c4_o.jpg
IMAGE LINK: http://www.flickr.com/​photos/kenkelly/603338​1001/  (external link)
TheBridge100% (external link) by Ken Kelly (external link), on Flickr

Ken
Fujifilm X100T | 5D III gripped |35L | 24-70 2.8L II | 70-200 2.8L IS II | 85 1.8 | 430 EX II | Yongnuo YN-568EX | Billingham 445 | Think Tank UD 60 |

  
  LOG IN TO REPLY
sponsored links
(this ad will go away when you log in as a registered member)
paddler4
Goldmember
Avatar
1,325 posts
Gallery: 3 photos
Likes: 14
Joined Aug 2009
     
Aug 11, 2011 19:48 |  #32

OP--you have been given a lot to digest. Here is what I would say, to simplify this.

IF you have no reason to shoot with a smaller aperture (larger f-stop number), you will get the greatest sharpness somewhere in the vicinity of f/8. However, there are lots of times when shooting at f/8 makes no sense at all--for example, if you need more depth of field. Moreover, unless you print very large, the deterioration from diffraction, from closing down the lens more, is usually pretty minor until you get pretty high, say >f/16. So don't obsess about it, but for landscapes, if the DOF is appropriate in the range of f/8, stay there. If it is not, don't worry about it--just keep it in mind as a tradeoff.

If you want to see why landscape pros often ignore this problem and shut the aperture down, check out page 45 of Carl Heilmann's Contemporary Landscape Photography, which is for many reasons a great read for novices. In that shot, which is certainly sharp enough, he needed a great deal of DOF, so he shot at f/25. Sure, he could have made either the foreground or the background a bit sharper if he opened the lens up, but he would have lost either one or the other because of smaller DOF.

Re barrel and pincushion distortion: almost all zooms with large zoom factors have these problems at the extremes. It is not something to worry about. It is extremely simple to fix in postprocessing if you notice it. In Lightroom, for example, it takes a single mouse click to get rid of this. You will notice this distortion in images with straight lines but often won't in other images. This is not a reason to avoid the extremes of your lens's range, imho.

the 15-85 is a very good lens. Just be prepared to spend a lot of time learning and practicing.


Check out my photos at http://dkoretz.smugmug​.com (external link)

  
  LOG IN TO REPLY
adza77
Senior Member
652 posts
Likes: 2
Joined Apr 2010
     
Aug 16, 2011 03:28 |  #33

For those with a 15-85 lens - how much extra benefit do you get with the 3mm compared to say an 18-55mm?

My main reason for looking at this lens is the wide angle. The extra at the other end is a bonus - but isn't a consideration for me. Does the extra 3mm difference between 18mm and 15mm make that big a difference?

Ta

Adam


Nearly all men can stand adversity, but if you want to test a man's character, give him power. - Abraham Lincoln

  
  LOG IN TO REPLY
raavi
Member
169 posts
Joined Dec 2010
Location: Germany
     
Aug 16, 2011 05:16 |  #34

It's nearly 4.8mm difference in terms of f-o-v. Its like 24 vs 28mm in full-frame. I personally go with 24mm.

adza77 wrote in post #12943543 (external link)
For those with a 15-85 lens - how much extra benefit do you get with the 3mm compared to say an 18-55mm?

My main reason for looking at this lens is the wide angle. The extra at the other end is a bonus - but isn't a consideration for me. Does the extra 3mm difference between 18mm and 15mm make that big a difference?

Ta

Adam




  
  LOG IN TO REPLY
raavi
Member
169 posts
Joined Dec 2010
Location: Germany
     
Aug 16, 2011 05:32 as a reply to  @ raavi's post |  #35

Here is one sample @15mm= 24mm(FOV)


HOSTED PHOTO
please log in to view hosted photos in full size.




  
  LOG IN TO REPLY
Jethro790
Goldmember
Avatar
2,193 posts
Likes: 3
Joined Nov 2004
Location: Southern New Hampshire
     
Aug 16, 2011 07:31 as a reply to  @ raavi's post |  #36

Something no one has mentioned is that if you want to improve colors in bright light situations, use a good circular polarizer. I consider it essential equipment for this lens.


If you must know...

  
  LOG IN TO REPLY
slickooz
Goldmember
Avatar
2,104 posts
Likes: 91
Joined Mar 2011
Location: Central NJ
     
Aug 16, 2011 08:19 |  #37

Would you have a CPL on it all the time, indoors and outdoors?


Facebook: Gary Feng Photography (external link)

  
  LOG IN TO REPLY
raavi
Member
169 posts
Joined Dec 2010
Location: Germany
     
Aug 16, 2011 08:29 |  #38

I do not recommend CPL for wide-angle lens. You will have strange effects...

Jethro790 wrote in post #12944092 (external link)
Something no one has mentioned is that if you want to improve colors in bright light situations, use a good circular polarizer. I consider it essential equipment for this lens.




  
  LOG IN TO REPLY
ct1co2
Goldmember
Avatar
2,752 posts
Gallery: 75 photos
Likes: 3069
Joined Feb 2009
Location: Denver, CO
     
Aug 16, 2011 08:32 |  #39

adza77 wrote in post #12943543 (external link)
For those with a 15-85 lens - how much extra benefit do you get with the 3mm compared to say an 18-55mm?

My main reason for looking at this lens is the wide angle. The extra at the other end is a bonus - but isn't a consideration for me. Does the extra 3mm difference between 18mm and 15mm make that big a difference?

Ta

Adam

For me it made a lot of difference. I went from a Sigma 17-70 + 10-20 combo to the 15-85. I felt the 17 was not quite wide enough and the 15-85 covers it fine for my needs. So much so that I don't need/want an UWA. I also use a quality CPL outside at times and have seen no ill effects on image results.


R6 | M50 | 10-22 | 15-85is | Σ18-35 | Rokinon 14 2.8 | 85 1.8 | 55-250is STM | 16-35is L | RF 24-105is L | 100-400 II L | Σ150-600 C | 1.4X III | 2X III | 430ex |

  
  LOG IN TO REPLY
bpark42
Senior Member
307 posts
Joined Jul 2009
     
Aug 16, 2011 10:13 |  #40

adza77 wrote in post #12943543 (external link)
For those with a 15-85 lens - how much extra benefit do you get with the 3mm compared to say an 18-55mm?

My main reason for looking at this lens is the wide angle. The extra at the other end is a bonus - but isn't a consideration for me. Does the extra 3mm difference between 18mm and 15mm make that big a difference?

The difference is fairly significant.

The horizontal angle of view at 15mm is approximately 74°
The horizontal angle of view at 18mm is approximately 64°

raavi wrote in post #12943787 (external link)
It's nearly 4.8mm difference in terms of f-o-v. Its like 24 vs 28mm in full-frame. I personally go with 24mm.

Multiplying the focal length difference by the crop factor doesn't provide any additional information about field of view...




  
  LOG IN TO REPLY
raavi
Member
169 posts
Joined Dec 2010
Location: Germany
     
Aug 16, 2011 10:27 |  #41

http://www.howardedin.​com/articles/fov.html (external link)

bpark42 wrote in post #12944840 (external link)
The difference is fairly significant.

The horizontal angle of view at 15mm is approximately 74°
The horizontal angle of view at 18mm is approximately 64°

Multiplying the focal length difference by the crop factor doesn't provide any additional information about field of view...

Indeed, it was mis-leading. Nevertheless it is equal to 24mm vs 28mm FOV in full-frame.




  
  LOG IN TO REPLY
CptTripps
Senior Member
Avatar
567 posts
Joined Mar 2011
Location: Anchorage, AK.
     
Aug 16, 2011 11:25 |  #42

looking at photozone this lens seems like it would take decent landscapes at F8 between 15-24mm. F11 does come with a small hit but the resolution holds up pretty well at at those focal lengths.


60D - Sigma 30mm 1.4 - 50mm 1.8 ImkII - 18-135 IS - 70-200 2.8 mkII - 2x430ex II - 3xFlextt5+AC3 - Einstein 640 w/mc2 - Vagabond Mini

  
  LOG IN TO REPLY
adza77
Senior Member
652 posts
Likes: 2
Joined Apr 2010
     
Aug 16, 2011 18:06 |  #43

Thanks guys.

74°to 64°. That's roughly 13.5% extra field of view. Just trying to work out if this is the right lens for me. (An amateur wanting to take some landscape photographs such as waterfalls, etc).

Thanks


Nearly all men can stand adversity, but if you want to test a man's character, give him power. - Abraham Lincoln

  
  LOG IN TO REPLY
Roy ­ Webber
Goldmember
3,186 posts
Likes: 4
Joined Nov 2006
Location: Corralejo, Fuerteventura....Canary Islands Spain
     
Aug 16, 2011 22:14 |  #44

adza77 wrote in post #12943543 (external link)
For those with a 15-85 lens - how much extra benefit do you get with the 3mm compared to say an 18-55mm?

My main reason for looking at this lens is the wide angle. The extra at the other end is a bonus - but isn't a consideration for me. Does the extra 3mm difference between 18mm and 15mm make that big a difference?

Ta

Adam

Very much so.


Canon 7D, 40D,100-400 IS L, EFS 15-85 IS, EFS 10-22-With Faulty USM, 055XPROB+488RC2, 430 & 580 II Flash, Tokina 11-16mm f/2.8-:cool:
Photos (external link)

  
  LOG IN TO REPLY
bpark42
Senior Member
307 posts
Joined Jul 2009
     
Aug 16, 2011 22:25 |  #45

adza77 wrote in post #12947375 (external link)
74°to 64°. That's roughly 13.5% extra field of view.

It's 15.6% more (74-64/64) ;)




  
  LOG IN TO REPLY
sponsored links
(this ad will go away when you log in as a registered member)

10,137 views & 0 likes for this thread
Canon 15-85mm help!!
FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
AAA
x 1600
y 1600

Jump to forum...   •  Rules   •  Index   •  New posts   •  RTAT   •  'Best of'   •  Gallery   •  Gear   •  Reviews   •  Member list   •  Polls   •  Image rules   •  Search   •  Password reset

Not a member yet?
Register to forums
Registered members may log in to forums and access all the features: full search, image upload, follow forums, own gear list and ratings, likes, more forums, private messaging, thread follow, notifications, own gallery, all settings, view hosted photos, own reviews, see more and do more... and all is free. Don't be a stranger - register now and start posting!


COOKIES DISCLAIMER: This website uses cookies to improve your user experience. By using this site, you agree to our use of cookies and to our privacy policy.
Privacy policy and cookie usage info.


POWERED BY AMASS forum software 2.1forum software
version 2.1 /
code and design
by Pekka Saarinen ©
for photography-on-the.net

Latest registered member is MarcusBullen
819 guests, 185 members online
Simultaneous users record so far is 15144, that happened on Nov 22, 2018

Photography-on-the.net Digital Photography Forums is the website for photographers and all who love great photos, camera and post processing techniques, gear talk, discussion and sharing. Professionals, hobbyists, newbies and those who don't even own a camera -- all are welcome regardless of skill, favourite brand, gear, gender or age. Registering and usage is free.