Bought my first manual focus lens - any warnings?

3 years 9 months ago #690744 by Devon Franklin
I have a Nikon D810 and just ordered a used  Nikon AF Nikkor 300mm f2.8 ED Lens today.  As I understand this is a manual focus lens.  

So other than I need to do all the focusing now, everything else is business as normal, right?


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3 years 9 months ago #690747 by Nikon Shooter
Yes, Devon, that's right but…

Since the D810 doesn't have a split focusing screen
or else natively, you will get focus confirmation with
the green dot at the bottom left of the view finder.

Light is free… capturing it is not!
Photo Comments
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3 years 9 months ago #690767 by Shadowfixer1
Use magnify on live view to confirm good focus on static objects.
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3 years 9 months ago #690784 by EOS_Fan
Green dot?  So how does the lens determine if you have a good focus?


Photo Comments
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3 years 9 months ago #690789 by Nikon Shooter

EOS_Fan wrote: Green dot?  So how does the lens determine if you have a good focus?


The lens is too old to have an AF system but the camera has
a darn good one!

Light is free… capturing it is not!
Photo Comments
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3 years 9 months ago #690802 by Shadowfixer1

EOS_Fan wrote: Green dot?  So how does the lens determine if you have a good focus?

No lens ever determines when you have good focus. The camera does. Even if you have an autofocus lens, the camera is the one sending instructions to the lens telling it what to do. The green dot is telling you the image is in focus because the focus module in a dslr or the on sensor focus detection on a mirrorless camera/live view dslr has determined the spot you have focused on is in focus.
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