Stuart Bell
Offline
• • •
Upload & Sell: Off
|
 p.1 #13 · Portrait vs mild zoom lens ?? | |
Phil Davis wrote:
Thought about the 100/2, but the FM reviews on it are uniformly bad for CA. That leads me back to the 85/1.8 which seems to get uniformly good press. Hadn't thought about the 135, though.
ISTR the otherway round regarding CA!
eg" I've also done some comparing of my lens with an 85mm f/1.8 that I used to own and I'm quite a bit more impressed with the CA performance at wide apertures with the 100mm than with the 85mm: at f/2, CA is present in high contrast situations, but not nearly as bad as with my 85mm; by f/2.5-2.8, the CA is already greatly reduced; and, by f/3.2-4, it's nearly absent."
Strangely, there are far more references to CA on the first page than on later ones.
Another quotation: "Sharper wide open and less CA then the 85 f/1.8"
From 85/1.8 reviews: " Excessive CA at f/1.8. Need a lot of post processing or conversion to B&W to fix this issue"
and: "Purple fringing is also fairly severe at any aperture wider than f2.8... especially at f1.8. It can ruin some shots."
and: "One aspect that I wish this lens could improve on is CA, especially purple fringing, at large apertures. Shooting cars with chrome is out of the question with apertures larger than f/2.8. Wide open to f/2.2 the purple fringing is very noticeable even at standard viewing sizes. At f/2.8, you have to look very closely and past f/3.5 CA disappears. This is only a problem with very reflective objects and it never really poses a problem with portraits."
From the DPR Canon lens-mount forum:
"for the last three years I have had the 85 f/1.8, 100 f/2, 135 f/2 and the 200 f/2.8.
the two lenses that get 90% of the use are the 100 and 200mm lenses. bioth are so underated. The 100mm gets the most, it is slightly sharper with less CA then the 85. The extra 15mm over the 85 has NEVR been an issue, I simply take one step back."
and "As I already described in another thread here a few minutes ago, my 85/1.8 has this fringing effect when wide open and shooting under artificial lighting. The 100/2 has been said to have less CA and might be a better indoor lens if it's true."
and "Mine had CA wide open and it toned down the more you stopped down. It did bother me a bit, so I tried the 100mm f2 instead. I ended up selling the 85 and kept the 100 which seems to have less CA than its 85 cousin."
and "I have 30D with 10-22, 24-85, 100 F2, 200 F2.8. For your question, I recommend 100F2 due to less CA compare with 85 1.8. I always carry my 200 2.8 in my bag for long distance shhot."
and "Not by my experience. I've owned both. The 100 f2 is the better choice - more flexible with a 1.4x teleconverter, less CA and sharper wide open - from my experience. Also, it seems 100 is a more flattering length for portraits than 85 - just my opinion."
and "Yep, the photozone review says the 100 has "exceptionally low" CA. They say on the 85 it is "usually not a problem", but then they draw attention to a shot which is *devastated* by CA. It's an exceptional circumstance, but better resistance to CA seems like it should tip the balance in favor of the 100mm."
and
"> Hi!
> I want to buy 85/1.8 for 1.6 cropped camera (350D/400D). But many
> reviewers (for example on Fred Miranda's forum) say that there is
> CA (purple fringing or "blooming") problem on f/1.8-4.5 and even
> f/8 !
I owned a 85/1.8 and actually suffered of purple blooming in some high contrast wide open (or almost) shots. I don't think the problem exists @ 4.5.
> So I read some reviews of 100/2 - probelem of CA still exists, but
> it's not so big as with 85/1.8
Never experienced with the 100 any blooming comparable with the 85, perhaps I didn't use it in the same challenging situations, though.
By the way I tend to agree: less CA with the 100.
> In my opinion 85/1.8 is better for portrait as it "little" brother
> of 85/1.2L. And for 100/2 there is no "big" brother.
The 85/1.8 is not the 85/1.2 L little brother, is 100/2 little brother, if any.
> What users of 85/1.8 and 100/2 can say - is there problem of CA
> (purple fringing) on REAL LIFE pics (portraits)? Maybe some PP can
> solve the problem?
Perhaps the 100 has less CA problems, the 85 has some wide open, for sure. "
So, the consensus seems to be that the 100/2 is marginally less affected by CA than the 85/1.8.
Stuart
|
