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Archive 2013 · loose lens
  
 
glenn1
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p.1 #1 · p.1 #1 · loose lens


I have a 300mm f2.8 afs 11 lens when mounted on my cameras ,D4&D3 there's quite a bit of play with it.tried a friends same model lens on my D4 and it was really tight to attach,infact i didn't turn it all the way home in case i couldn't get it off.Would this looseness affect the focusing as i feel that sometimes the images are not as sharp as they should be,i was thinking of getting a new lens mount fitted if still available,would this solve the focus problem.Any feedback welcome. Graham


Feb 04, 2013 at 05:17 PM
lxdesign
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p.1 #2 · p.1 #2 · loose lens


when you mean loose - do you mean side to side play? as in the lens twists a bit, or does it actually rock forwards and backwards slightly in the mount?


Feb 04, 2013 at 05:35 PM
BenV
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p.1 #3 · p.1 #3 · loose lens


I never had a loose lens. It sounds like somehow your damaging the mounts of your cameras.


Feb 04, 2013 at 05:55 PM
runamuck
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p.1 #4 · p.1 #4 · loose lens


If it twists (rotation), that's okay. Some play is necessary to ensure the lens locks in position. If it moves to the extent that a gap appears at any point on the mated surfaces, that is a problem.


Feb 04, 2013 at 05:56 PM
glenn1
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p.1 #5 · p.1 #5 · loose lens


Thanks for getting back to me guys,it twists (rotation) a little.it's just that i tried my
mates lens and it was so tight compaired to mine with no play at all.just thought maybe i should get it checked out as it hasn't been serviced for quite some time now.



Feb 04, 2013 at 06:06 PM
runamuck
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p.1 #6 · p.1 #6 · loose lens


With a lens that long and a large aperture, your DOF can be so small as to be almost invisible. At 20 feet DOF is only about 3 inches on full frame. It;s even less on crop cameras.


Feb 04, 2013 at 06:54 PM
 

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Zebrabot
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p.1 #7 · p.1 #7 · loose lens


there actually is some play with the F mount, and it shows up easier with longer lenses.

You're describing something that won't fit- so don't force it. Is one of the screws on the lense at the mounting bayonet loose by chance?




Feb 04, 2013 at 07:48 PM
RoyC
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p.1 #8 · p.1 #8 · loose lens


It has been my experience that the difference in snugness between Nikon lenses is due to the O-ring at the lens mount. Look at the two and see if your friends lens has an o-ring that extends out a little more than yours. You may have some wear on the ring is all.




Feb 04, 2013 at 08:22 PM
glenn1
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p.1 #9 · p.1 #9 · loose lens


Thanks for replying All .


Feb 05, 2013 at 06:50 AM
lxdesign
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p.1 #10 · p.1 #10 · loose lens


I think you're probably ok..... I had a bit of a twist years ago with an older 80-200 AFS lens, and it didn't affect image quality at all..


Feb 05, 2013 at 04:16 PM
glenn1
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p.1 #11 · p.1 #11 · loose lens


lxdesign, my 80-200 afs is also a little loose,matbe it is the o ring.will get it checked out,
Thanks for your time.



Feb 05, 2013 at 04:55 PM





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