Is the f2.8 constant for all the zoom range...? I mean the f value will change if one zoom out/in.
830312
The SETTING should stay the same. I'm checking...In the Aperture mode, setting to f/2.8 and rotating the zoom full out and back, the F/2.8 stays the same on the screen. On my Nikon D7000 the only way to control the ap...unless I've missed something, is in the A mode. Changing the mode dial displays a different ap biased on other factors. Even then, rotating the zoom does not change the displayed ap setting. Ie if rotating the mode from A mode where you have set the ap to say f3, to M or S, the ap may stay or move to another value if needed. At this point, whatever the value is displayed, rotating the zoom out or in does not change the f value. The SETTING should stay the same. I'm checking...In the Aperture mode, setting to f/2.8 and rotating the zoom full out and back, the F/2.8 stays the same on the screen. On my Nikon D7000 the only way to control the ap...unless I've missed something, is in the A mode. Changing the mode dial displays a different ap biased on other factors. Even then, rotating the zoom does not change the displayed ap setting. Ie if rotating the mode from A mode where you have set the ap to say f3, to M or S, the ap may stay or move to another value if needed. At this point, whatever the value is displayed,... » Read More The SETTING should stay the same. I'm checking...In the Aperture mode, setting to f/2.8 and rotating the zoom full out and back, the F/2.8 stays the same on the screen. On my Nikon D7000 the only way to control the ap...unless I've missed something, is in the A mode. Changing the mode dial displays a different ap biased on other factors. Even then, rotating the zoom does not change the displayed ap setting. Ie if rotating the mode from A mode where you have set the ap to say f3, to M or S, the ap may stay or move to another value if needed. At this point, whatever the value is displayed, rotating the zoom out or in does not change the f value. « Show Less
830313
It's like any other modern 70-200 f2.8. If you set it to f2.8 in manual it will stay there. In auto mode the camera will change shutter speeds and aperture to suit conditions.
830314
Yes, the f-stop is fixed throughout the zoom. Unless you change it on the camera.
830315
Hey Ed, When I was shooting at my son's hockey game every now and again it would all the way out and the camera had to be restarted. This was specific to the lens I bought. I ended up buying a brand new one and dontregret dropping the extra cash at all.
830316
In auto mod it changes. But in the manual mode you select your f and focus manually.
1711775
No issue with the full 20x optical zoom. Suggest that you run a test under ideal condition i.e. with the camera on a tripod. You will get degradation when using the digital zoom at or near the max zoom.
1551101
That is exactly why I purchased this lens and I love it! The focus is a bit soft if you try and go below f2.2, but as I'm generally shooting moving children I usually keep it around f2.5 or 2.8 anyway. Hope this helps!
1485838
Thank you for the response. But that is not it. I have walked through all the "Aspect' setting and the problem still exists in each area. It is very bad in the zoom setting.
278851
This is 45-175mm (90-350mm full frame equivalent). So at maximum zoom you get 350mm at f5.6)
2207206
It just so happens that yesterday I tried the 2.0 on my 7D Mark II with the new 100-400 II lens and it lost its AF function. It works fine with the 1.4 extender, though.
1130013
Your pocket should answer this question mainly.. I had f4 before getting the f2.8. For me , I love the 2.8 even though it is very expensive than the f4.The only thing I miss is the handy size of the f4....would not like take the the 2.8 when I go out to park with the children......
837212
No. The aperture is adjustable in all "creative modes." That is, A, S, M and P settings. You would "force" f/2.8, for example, if you locked ISO at 100 and then selected a fast shutter speed - in other words proper exposure would required f/2.8. In the Scene modes, you have far less control. Put the camera into Auto ISO and see if you still have this issue.
1157942
As MDA pointed out, the nodal point moves on all zoom lenses, whether or not the external barrel extends/retracts. I have shot panoramas with this lens's big brother (f/2.8) and been very satisfied with the results. I think this is a non-issue.
389219
As far as I know, there's no focus adjust. It's auto-focus, and everything in the FOV appears in focus all the time. I've never seen anything be out of focus.
2039004
Not sure. Mine never worked properly and the zoom function was non-functional.
1118970
Assuming his was bought for macro, why are you shooting at 1.8? I rarely shoot at anything below f14 when using this flash.
595979
Yes you can adjust the aperture. F/2.8 is the max you can go and it can be constant as you zoom in and out. but you can lower it to say F/8 etc.
1547552
Sure, it should be very similar. 2.8 is 2.8 no matter which lens. The larger the aperture the faster your shutter speed will be. Obviously you need to be close enough, it seems like some of the other comments haven't read what you asked. I have used this to catch my son running around the house or outside. I also have the 70-200 f4 IS for telephoto zoom.
592018
It does not have a zoom. It is more geared towards wide shots. You can pick your format and that does change the width of the captured image, it's explained in the manual. There are 3 settings but they are not available in all modes. Full, Medium and Narrow Field of View, Full is 170 degrees (very wide), medium is 127 degrees and narrow is 90 degrees. In the sales lit this is referred to as FOV or Field of View and that's essentially your zoom.
229477
autofocus works fine except when you are really zoomed in all the way ... sometimes it struggles with fast moving objects.
750392
No, you have to preset the zoom before going down. Other then that, definitely use flash attachment.