avsquare
Senior Member
question to those who own this glass.
is it parfocal?
How about 95% parfocal :bsmilie:
I think it was intended to be, but I notice slight misfocus.
Nikon 70-200mm f4 G VRIII Next week ;)
- Thread starter Dfive
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How about 95% parfocal :bsmilie:
I think it was intended to be, but I notice slight misfocus.
avsquare
Senior Member
oh...at what focal length did it misfocus?
I released the lens already, but as far as I know when I zoomed from 70mm to 200mm it wasn't 100% in focus. But again I remembered correctly, other lens that claimed parfocal may also be like that.
I can confirm from my f4 copy... lens breathing is there and I think I did not notice it much or does not bother me is that.. it narrows the FOV instead of widen. So at min distance focus, the FOV is narrower, and as you focus to infinity.. it widens.
And yes.. as you zoom or unzoom.. the lens will misfocus by 5mm
Focus Breathing.. BTW this is just a test video in a very crude way.. please dun complaint that it is shot with a m4/3 or PnS camera..
Initial is focus at infinity.. and move to min focus distance.
[video=youtube;UMys9wOD1-8]http://www.youtube.com/watch?v=UMys9wOD1-8[/video]
And yes.. as you zoom or unzoom.. the lens will misfocus by 5mm
Focus Breathing.. BTW this is just a test video in a very crude way.. please dun complaint that it is shot with a m4/3 or PnS camera..
Initial is focus at infinity.. and move to min focus distance.
[video=youtube;UMys9wOD1-8]http://www.youtube.com/watch?v=UMys9wOD1-8[/video]
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Here is the video for misfocus.
Initial is at 70mm close to min focus distance.. and zoom to 200mm. Focus is set on the middle of the Nikon wording
[video=youtube;HoOucNA-fo8]http://www.youtube.com/watch?v=HoOucNA-fo8[/video]
70mm almost 100% crop on focus pt
200mm less than 100% crop on focus pt with the focus unchange from above
Initial is at 70mm close to min focus distance.. and zoom to 200mm. Focus is set on the middle of the Nikon wording
[video=youtube;HoOucNA-fo8]http://www.youtube.com/watch?v=HoOucNA-fo8[/video]
70mm almost 100% crop on focus pt
200mm less than 100% crop on focus pt with the focus unchange from above
Last edited:
avsquare
Senior Member
Here is the video for misfocus.
Initial is at 70mm close to min focus distance.. and zoom to 200mm. Focus is set on the middle of the Nikon wording
[video=youtube;HoOucNA-fo8]http://www.youtube.com/watch?v=HoOucNA-fo8[/video]
70mm almost 100% crop on focus pt
200mm less than 100% crop on focus pt with the focus unchange from above
Yup there is a slight misfocus even for parfocal lens iirc, because there's no perfect parfocal lens.
D100S
Senior Member
At last d item arrived. When I am deciding whether to sell the lens.
Any particular reason for decide to sell if you don't mind to share? I mean any image quality or built quality issue?
D100S
Senior Member
No particular reason. Its a terrific lens. Just that I have basically no time or energy to go out and shoot. So my 24-120 f4 is enough. I just sold the 28-300, so thios sould be the next in line.
avsquare
Senior Member
too expensive. IIRC JP was just about $100. Maybe I can mass buy and sell for $150 here LOL :bsmilie:
alamak, I just ordered from Kirk.
Hi all,
I have read in some reviews that when wide open at 200mm, the edges are a bit soft, need to stop down to F8 to get sharp photos. Is this the case?
Appreciate if owner of this lens can share some photos where the focussing point is set at the extreme edge at wide open.
Many thanks.
SAM
I have read in some reviews that when wide open at 200mm, the edges are a bit soft, need to stop down to F8 to get sharp photos. Is this the case?
Appreciate if owner of this lens can share some photos where the focussing point is set at the extreme edge at wide open.
Many thanks.
SAM
I will try to do some shots this weekend but as I am using a D7k, the edges will be much sharper compare to a fx I presume.
Thanks radonsg. Looking forward to see the photos.
4 quick shots hand held with focus point @ the 4 extreme corner of the focus grid wide open,
test - a set on Flickr
Thanks again radonsg. However, I can't tell even when I look at flickr full screen how sharp it is. Since you have all the four shots, can you tell me if it is sharp or soft?
Many thanks.
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