| Author | Thread |
|
|
09/03/2004 01:47:47 AM · #1 |
Very sharp :-)
 |
|
|
|
09/03/2004 03:00:33 AM · #2 |
How much? What's the aperature?
Message edited by author 2004-09-03 03:00:58.
|
|
|
|
09/03/2004 03:20:33 AM · #3 |
|
|
|
09/03/2004 03:28:28 AM · #4 |
|
|
|
09/03/2004 03:38:10 AM · #5 |
I've been an 85/1.8 promoter for a while. Really excellent lens for the price, and for indoor sports along with a 50/1.8 (or 1.4) it's fantastic.
|
|
|
|
09/03/2004 03:56:27 AM · #6 |
seems sharper than my 50/1.4 @ 1/8 - could that be because of the focal length/distance from subject difference?
|
|
|
|
09/03/2004 04:01:50 AM · #7 |
According to Photodo.com the 85/1.8 gets a grade of 4.1 for MTF charts, while the 50/1.4 gets a 4.4. Both are pretty high, and easily pro lenses, but the 50/1.4 wins!
The Canon 85/1.8 is fairly well respected in sports photog circles.. More so than the 85/1.2, which is supposed to be fairly slow focusing.
|
|
|
|
09/03/2004 04:06:46 AM · #8 |
| Quite nice, would probably make a good portrait lens. |
|
|
|
09/03/2004 04:46:04 AM · #9 |
Originally posted by PaulMdx:
According to Photodo.com the 85/1.8 gets a grade of 4.1 for MTF charts, while the 50/1.4 gets a 4.4. Both are pretty high, and easily pro lenses, but the 50/1.4 wins!
The Canon 85/1.8 is fairly well respected in sports photog circles.. More so than the 85/1.2, which is supposed to be fairly slow focusing. |
I should rephrase - seems like it has a wider DoF at 1.8 than my 50/1.4 has at 1.8.
|
|
|
|
09/03/2004 09:15:44 AM · #10 |
Originally posted by BikeRacer:
I should rephrase - seems like it has a wider DoF at 1.8 than my 50/1.4 has at 1.8. |
I am trying to educate myself about lenses so please bear with me. Theoretically, aren't two lens of the same focal length (50mm) set to the same aperture (1.8) and used on the same camrea, or, more properly, used on cameras with the same crop factor, supposed to have the same finite and measurable deep of field characteristics? |
|
|
|
09/03/2004 09:24:54 AM · #11 |
Originally posted by coolhar:
Theoretically, aren't two lens of the same focal length (50mm) set to the same aperture (1.8) |
BikeRacer was talking about the 50mm and 85mm, so they were different focal lengths.
|
|
|
|
09/03/2004 09:28:42 AM · #12 |
| Canon 85mm f/1.2..even sharper! :-p |
|
|
|
09/03/2004 10:11:15 AM · #13 |
| 50 mm f1.8 is cheap looking lens with more distortions than 85 mm which is proffesional grade. |
|
|
|
09/03/2004 10:29:52 AM · #14 |
Originally posted by PaulMdx:
Originally posted by coolhar:
Theoretically, aren't two lens of the same focal length (50mm) set to the same aperture (1.8) |
BikeRacer was talking about the 50mm and 85mm, so they were different focal lengths. |
OK, I missed that. Thought he was comparing the 50 1.4 and the 50 1.8. But since I put my foot in it, my assumption about DoF being the same was correct, right? Seems like sharpness, contrast, bokeh, and some others are sort of subjective when comparing lenses. Having one point that is more objective makes it easier for my old head. |
|
|
|
09/03/2004 10:48:00 AM · #15 |
| I have this lens and love it! It is by far my favorite lens. |
|
|
|
09/03/2004 10:57:34 AM · #16 |
Originally posted by coolhar:
But since I put my foot in it, my assumption about DoF being the same was correct, right? |
Yes. Variables affecting DoF for a lens are focal length and aperture size measured in stops.
Originally posted by coolhar:
Seems like sharpness, contrast, bokeh, and some others are sort of subjective when comparing lenses. |
Yeah, sort of. Some of these qualities are affected by lens construction mechanics like internal lens coatings, quality of the glass etc.
Message edited by author 2004-09-03 10:59:36.
|
|
|
|
09/03/2004 12:49:21 PM · #17 |
The 50 f/1.4 and 85 f/1.8 are my favorite lenses, but the 85 really adds some extra pop to the images. I think it's because the longer focal length gives a more shallow depth of field and better bokeh. The shot below was taken with the 85mm at f/4.0 and the separation between the subject and the background just amazed me.
|
|
|
|
09/03/2004 12:58:34 PM · #18 |
I think David's example of stopping down this lens demonstrates just how sharp it is. I'm sure the 1.2 L is sharper and I am looking forward to purchasing it someday to compare but in my experience the 1.8 version is so sharp that sometimes I don't even have to USM the photo. Stopping the lens down from 1.8 even to 4 allows for creamy bokeh, separation of the model and a deep enough DoF to capture your subject. At $350 USD this is a definite "need it" lens.
Kev
|
|
Home -
Challenges -
Community -
League -
Photos -
Cameras -
Lenses -
Learn -
Help -
Terms of Use -
Privacy -
Top ^
DPChallenge, and website content and design, Copyright © 2001-2025 Challenging Technologies, LLC.
All digital photo copyrights belong to the photographers and may not be used without permission.
Current Server Time: 09/12/2025 03:38:22 PM EDT.
