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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 02 Aug 2009 (Sunday) 03:21
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Filter lesson learned

 
Kaigler
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Aug 02, 2009 03:21 |  #1

I had previously made a post a few weeks ago questioning the sharpness of the lens. It just wasn't what I expected but I eventually came to terms with it and blew it off as user error.

After reading another post about someone taking their filter off to reveal a much sharper image I decided to take my $20 dollar Hoya filter off of my 70-200 L to give it a shot. I took the lens to the pool to shoot the family as they swam.

When I got home to look at the images it finally happened. The sharpness of the images took my breath away and was replaced by "L" This is what I expected out of this lens. An amazing piece of equipment.

Lesson learned - don't use crap filters.

IMAGE: http://farm3.static.flickr.com/2582/3779551562_2f581e7d26_b.jpg

100 percent crop

IMAGE: http://farm3.static.flickr.com/2541/3780598946_c4c0e666c8_o.jpg

Canon 5D Mk III - Canon 24-105 f/4 L IS, Sigma 85 f/1.4, Canon 70-200 f/2.8 IS, Tamron 15-30 f/2.8 VC

  
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98 ­ SNAKE ­ EATER
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Aug 02, 2009 03:27 |  #2

Which Hoya filter did you use?

I was planning on getting one for my 100-400mm, but I might end up going with B+W instead :confused: (damn these things are expensive)




  
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Kaigler
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Aug 02, 2009 03:30 |  #3

It was the Hoya standard UV filter. Bottom $20 dollar filter sold at most local camera stores. If you are going to use a filter - spend the money and do your research. I'm thinking of ordering this one tomorrow for the 70-200 http://www.bhphotovide​o.com …236_67mm_UV_Haz​e_010.html (external link)


Canon 5D Mk III - Canon 24-105 f/4 L IS, Sigma 85 f/1.4, Canon 70-200 f/2.8 IS, Tamron 15-30 f/2.8 VC

  
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Kaigler
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Aug 02, 2009 03:50 |  #4

And for some reason, that crop is less sharp than it appears in the actual upload to Flickr. Yet its a link to Flickr...Does the forum do something to do the image?


Canon 5D Mk III - Canon 24-105 f/4 L IS, Sigma 85 f/1.4, Canon 70-200 f/2.8 IS, Tamron 15-30 f/2.8 VC

  
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MinhThien
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Aug 02, 2009 03:52 |  #5

Test the lens wide open @ f4 not f5.6.


Eric
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yogestee
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Aug 02, 2009 09:25 |  #6

MinhThien wrote in post #8384210 (external link)
Test the lens wide open @ f4 not f5.6.

This is what I do when I get a new lens..Rattle a few exposures off wide open.. Most problems with lenses will exhibit themselves wide open..


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Ralph ­ Merlino
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Aug 02, 2009 09:35 as a reply to  @ yogestee's post |  #7

I have said so many times, use a top of the line filter like a B+W
and you won't have that problem.




  
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argyle
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Aug 02, 2009 09:39 |  #8

98 SNAKE EATER wrote in post #8384161 (external link)
Which Hoya filter did you use?

I was planning on getting one for my 100-400mm, but I might end up going with B+W instead :confused: (damn these things are expensive)

The 100-400L is pretty squirrelly with filters. TBH, if you use the hood, its deep enough to provide plenty of protection. And once you get to 77mm and larger filters, the price really starts to jump up...


"Fat, drunk and stupid is no way to go through life, son". - Dean Wormer

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MDJAK
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Aug 02, 2009 09:43 |  #9

There's another lesson here.

Besides Grad ND filters for special effects, Polarizer filters, don't use filters at all. Even expensive ones will degrade IQ.

me




  
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neil_r
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Aug 02, 2009 09:46 |  #10

Why would you spend big $ on any lens and then stick a small $ filter in front of it ???


Neil - © NHR Photography
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artyH
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Aug 02, 2009 12:28 as a reply to  @ neil_r's post |  #11

The cheapest Hoya filters are coated, but not multicoated. You want one that is multicoated, like the Hoya HMC or the Hoya super.
I don't know if the B&W is going to be any better than the Hoya super - look for filter reviews - there should be some at this site.




  
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Kaigler
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Aug 02, 2009 12:37 |  #12

neil_r wrote in post #8384845 (external link)
Why would you spend big $ on any lens and then stick a small $ filter in front of it ???

When I didn't think it made a difference. That's why. I know now.


Canon 5D Mk III - Canon 24-105 f/4 L IS, Sigma 85 f/1.4, Canon 70-200 f/2.8 IS, Tamron 15-30 f/2.8 VC

  
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Celestron
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Aug 02, 2009 14:16 |  #13

Thats why i bought the HOYA PRO1 DMC (external link) (Digital Multicoat) LPF (Low Profile Frame) UV filter for both my 18-55mm IS and 70-200mm f/4L . Have not had any image quality degrades .




  
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nicksan
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Aug 02, 2009 14:19 |  #14

Always use high quality mulit coated filters.




  
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hollis_f
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Aug 03, 2009 05:40 |  #15

Ralph Merlino wrote in post #8384810 (external link)
I have said so many times, use a top of the line filter like a B+W
and you won't have that problem.

As I've said many times, if you don't stick a functionless piece of glass in front of your lens then you're certain not to have any problems.


Frank Hollis - Retired mass spectroscopist
Give a man a fish and he'll eat for a day. Teach a man to fish and he'll complain about the withdrawal of his free fish entitlement.
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Filter lesson learned
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