Hi all,
I was in town yesterday shopping with herself (i.e. she shopped and I took photos on the street outside).
All of the shots were on a 1DsMKii and the ones taken with my 50mm 1.8 are all fuzzy like the worse cheap lens would give. I also was using a 70-200f4 L and these are fine.
I was over exposing by 1.3 stops which my have contributed.
Have a look at the shots belwo and let me know what you think is causing this.
Thanks
John
#1 resized:
were you shooting wide open? my 50 1.8 is also quite soft wide open but it is blistering sharp by f/3.5. i wouldn't be surprised at these results if u were shooting wide open. it also would help to know what shutterspeed.
OP, for the first shot, did you use autofocus or Manual Focus? If AF, you could need calibration. If MF, then I think you might have a dud...but try some more shots on stationary objects first
For pics 2 and 3, it's hard to tell for those pics since the subjects are moving you introduce a whole new variable into the mix (AI servo inaccuracy, one shot delay causing the people to go OOF etc)
I think there is QC issues with this lens, my 50 f/1.8 II is extremely sharp wide open.
I just did a comparison of 50 f/1.8 against 35 f/1.4L, both at f/1.8, DPP Raw conversion, sharpness setting at default 3, to show what the 50 f/1.8 is capable wide open:
all were auto focused with AI servo and using the shutter release button for AF and AE, (I normally use the back button for AF but changed for these).
first shot was 1/400s f/1.8 at 50.0mm iso100 (this morning)
second was 1/800s f/2.2 at 50.0mm iso200
and third was 1/400s f/1.8 at 50.0mm iso200
the street ones were over exposed by 1.3 stops but the shots taken with the 70-200 which were also over exposed didn't exhibit this level of distortion.
I'll have a go with the lens tomorrow and stop it down a bit and see what happens.
J
Yeah, that just doesn't seem right. Have you had good shots with your 50/1.8 before, or have they always been like this?
It's worth it to try it again properly exposed, wide open vs. stopped down.
If it's not exposure related and is just how your copy is wide open (meaning your stopped down shots are significantly better), then I think you copy is suspect. It should be way sharper wide open. That third shot is really bad.
I've owned three EF 50 1.8 and all were very soft at F1.8 and suffered strange sideways flare when viewed close. By F2.8 they were decent and were very sharp at F5.6. All my L zooms were better at the same apertures. Plus, the darn thing really struggles to AF in even moderately low light. Probably rare to find a critically sharp one at F1.8. Dawei really lucked out on his.
This is the first time I've seen this from this lens. I've used it on a 450D and it was fine.
I have a Nikon UV filter on it which might be the problem (ok, taking tongue out of cheek now)
Then something strange has happened. I have one that is pretty sharp, but even the soft ones I saw were much better than yours (judging only by the images you posted). Try again both wide open & stopped down. My guess is that it needs to be calibrated for your 1DsII.
forrest5000 wrote:
This is the first time I've seen this from this lens. I've used it on a 450D and it was fine.
I have a Nikon UV filter on it which might be the problem (ok, taking tongue out of cheek now)
Well, now that's worth noting. It should be better on a 450D. You are getting the "sweet spot" in the center of the image circle because it is a crop sensor. Your FF camera will really put that lens to a test at f1.8. Check out the crop vs. FF blur plots at slrgear.com.
So, was this lens ever "good" on your 1-series?
Stop it down to f2.8. Center of the frame should be pretty sharp on your FF camera.
dwweiche wrote:
So, was this lens ever "good" on your 1-series?
I can't remember, I'll check it in Lightroom and see if it comes up in a search.
J
Just carry out a quick search and on the 1Ds at f1.8 it has generally been ok with a little bit of purple fringing. Definitely nothing like yesterdays results.
So Robert, do you think it is just simply OOF because of servo? It looks more odd than that to me. Almost like the lens was dirty as hell or something. The fringing at some of the higher contrast edges seems telling.
I know OOF, because 80% of the pictures I take turn out that way
dwweiche wrote:
So Robert, do you think it is just simply OOF because of servo? It looks more odd than that to me. Almost like the lens was dirty as hell or something. The fringing at some of the higher contrast edges seems telling.
I know OOF, because 80% of the pictures I take turn out that way
Could be a larger issue, but the purple fringing is quite common with fast primes wide open.
I have a 50 1.8, and it's a great little lens, however the focus on it is as slow as a two toed sloth. It really could use some help.
Before he can rule out the servo, he needs to take a few tripod shots with a stationary subject, in one shot focus mode and see how they turn out. Also at f/1.8, f/2.8, f/4 and the like.
Here's my 50 at f/2.8 (sorry, I don't have it at 1.8, as I was comparing it to my 24-70.
dwweiche wrote:
Dude, you must be a giant! Those trains looks like tiny in your enormous presence!
I was on a bridge haha I'm like below average male height I think, 5 7
