nikon 70-300G infinity question

[mattobr]

:?hi all

was playinglast night trying to take some astro photos , and using the lens on manual focus , when i wound the lens right round to infinity (endstop) the stars were out of focus but when i wound the lens back a fraction they came in to focus , is this the norm with nikon lens .

i tried it in the day time today on manual and noticed it as well on long distance items had to go back a fraction to bring them in to focus ,

any ideas

cheers matt

[NHL]

All lenses do this - It allows for temperature expansion or for the occasional 1.4/2x teleconvserter one would put between the lens and the body...

IR photography focus is slightly off from the visible spectrum too

[mattobr]

hi

thanks for the info , just been to the shop and theres is the same , guy in shop was a bit unsure why it did it .



thanks again matt