Erstaunlich genug, attestiert er dem Sigma hier leichte Vorteile gegenüber dem Nikkor.
BUT...One Noticeable Idiosyncrasy! Part way through the test period I had occasion to shoot some close-up shots of squirrels with both lenses mounted on a D500 (both with and without their respective teleconverters). Think "full-frame shots" and think SHALLOW depth-of-fields (or DoF's). During this time I was shooting in short, high-speed (10 fps on D500; 12 fps on D5) bursts. And, when scrutinizing the shots, I noticed that with the shots taken with the Sigma 500 there was some inconsistency in focus between images captured within a single high-speed burst (when the subject is absolutely static and the camera is not moving). That lead me to shoot several sets of test shots to see what I could learn about this "focus shifting" between frames in a high-speed burst. Here's what I found out:
• The focus shift is normally only noticeable on static subjects
• The focus shift seems to only occur on high frame-rate bursts (greater than 5 fps or so)
• The focus shift is subtle and thus most noticeable on shots with very thin DoF's (e.g., close subjects)
• The focus shift pattern is often as follows: first shot sharp; second shot soft (under the focus point); third shot sharp, etc.
• The focus shift is independent of the OS and AF settings (both those that are adjustable on the lens OR through customization) - it occurs in all AF or OS modes.
• The focus shift occurred on both D5 and D500 bodies.
• The focus shift did NOT occur when I was using the Nikkor 500mm f4E VR
Das alles liest sich aber sonst wirklich toll, ich denke ich werde mir in den nächsten Wochen mal ein Sigma 500/4 OS zulegen
The focus shift seems to only occur on high frame-rate bursts (greater than 5 fps or so)
The focus shift occurred on both D5 and D500 bodies.
The focus shift did NOT occur when I was using the Nikkor 500mm f4E VR
Das klingt auf jeden Fall sehr gut, vor allem in Anbetracht des Preises. Allerdings, bin ich mir nicht sicher, ob das Sigma wirklich Vorteile hat, denn dieser Abschnitt, wäre für mich schon ein deutlicher Negativpunkt.
Dann hau rein, ich bin wahrscheinlich demnächst beruflich mal wieder öfter in Hanau. Will das Sigma dann auch mal selber probieren, denn leider gibt es für mich beim Test von Brad ein paar Ungereimtheiten, die aber durchaus beide Objektive betreffen.
Eventuell nicht perfekte Kommunikation Body Linse was den Af angeht ??
Sowas ähnliches kenne ich von der 7D2 (aber mit Originallinsen) und das trieb mich in den Wahnsinn.. daher nie wieder 7D2.
Ja, mal schaun.
Ansonsten komme ich in Meppen vorbei und wir packen Eric noch mit ein
Gute Idee... soll ich rot oder gelb mitbringen
As discussed, one of this lens' intended uses is for sports and it is a member of the Sigma Global Vision "Sports" lens lineup. When using lenses such as this one for sports, I usually use the widest aperture available and in that case, focus shift is of little or no consequence. I also frequently use a wide open aperture for wildlife photography, but ... not always. Especially if photographing a very close subject, I sometimes want more depth of field than f/4 provides and in these cases, the focus shift is going to be a problem. In the field, I didn't find the focus shift at f/5.6 to be bad, but a higher majority of my f/8 images were slightly soft.
Er hat einen Fokusshift entdeckt. Das klingt ja leider nicht ganz so toll.
I found no significant (or “noticeable”) focus shifting in my Nikon-mount version of the Sigma 500. I don’t know the source of the issue he experienced, but it could be a bad sample issue or a Canon-only issue.
In the Nikon Menu Guide for the D5 they recommend that you do your tuning at maximum aperture (wide open). I don't know if this means the values will change at other apertures or not. I hope not, because I almost never shoot absolutely wide open with any lens. So I'd log this in my mind as a "possible" source of variation (and ready to access when I get inexplicable results!).
Was mich beim Ausspacken sofort positiv überrascht hat:
Ich hatte das Sigma heute mit auf dem DTB-Pokal, Turnen.
Die ersten Fotos möchte ich euch nicht vorenthalten...
...Ich bin tatsächlich auf dein Resümee gespannt,...
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?