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09-01-2007, 09:36 AM   #1
Ed in GA
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85mm -vs- 100mm

with the crop factor not in consideration.

How much real difference is there between the 85mm and 100mm lens when being used for Portraiture?

On e-bay, in the "M" series, I've seen the 100mm lens going for around $100 while the 85mm seems to bring in excess of $200. Of course, there is the difference between f/2 with th 85 and and f/2.8 with th 100 but is there much more of a real difference than just a slightly narrower FOV with the 100? Is the 85 really worht $100+ more?

09-01-2007, 10:29 AM   #2
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QuoteOriginally posted by EddyinGA Quote
with the crop factor not in consideration.

How much real difference is there between the 85mm and 100mm lens when being used for Portraiture?

On e-bay, in the "M" series, I've seen the 100mm lens going for around $100 while the 85mm seems to bring in excess of $200. Of course, there is the difference between f/2 with th 85 and and f/2.8 with th 100 but is there much more of a real difference than just a slightly narrower FOV with the 100? Is the 85 really worht $100+ more?
I have both the M85 and M100 lenses, and frankly I find very little difference between these two focal lengths in practice. The slightly narrower DOF at 100mm is compensated-for by the larger maximum aperture of the 85mm. In addition to the narrower DOF at 100mm, the subject is slightly more flattened (or there is less perspective distortion, take your pick). There may be bokeh differences as well - I don't recall at the moment.

As stated in another thread, you ought to pick your lens based on how well it serves to render the subject/scene as you envision it, not in slavish response to any convention as to which lens is *better* to use for portraits. If price matters get the M100 - you won't be disappointed.
09-01-2007, 11:02 AM   #3
Ed in GA
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Thanks Jim,

I already have the 100mm f/2.8. I've been seeing a couple of the 85mm f/2 up for auction. You've answered my question. There's really no need to have both.

Thanks again.

Ed
09-01-2007, 06:17 PM   #4
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QuoteOriginally posted by EddyinGA Quote
There's really no need to have both.

Thanks again.

Ed
Ed, don't let a little thing like "need" get in the way of LBA!

09-02-2007, 02:45 PM   #5
Ed in GA
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QuoteOriginally posted by Wethphotography Quote
Ed, don't let a little thing like "need" get in the way of LBA!
Hey Erl,

If you'll look at that list of stuff I've aquired lately, you'll see that I agree with you completely.

Ed
09-03-2007, 03:15 AM   #6
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Had both M-lenses: 2/85 and 2.8/100.
Sharpness-wise they're the same level.
85 is much more compact!
I sold both.
Got me the K 1.8/85 which is much better:
Sharpness and ...
- build-quality!
If you want something better: That's the way to go.
Oh: Had the A* 1.4/85 too which is just too big and heavy to carry-around long-time.
Having the K 1.8/85 now is enough - my result after having all of them.
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