lost fstop display on tamorn lens

how is fix what contact

Has it accidentally come off the 'A' setting?

Mind, I'm just presuming it is an 'A' lens - you haven't said what lens it is or if it had been working OK and just gone wrong or if you have recently acquired it and it has never worked!

John

alens set on a sometimes i get f stop then goes away as if contact was not working

this is a tamron AFaspherical LD[if] 28 -300mm macro

If it's an Adaptall 2 mount you may need to clean the electrical contacts on the lens and the actual mount itself as that too is used as an electrical contact.

Well, not Adaptall but still worth seeing if cleaning the contacts helps. Presume other lenses are OK?

John

will do thanks

yes other lens fine

cleaning contacts gave a f stop just for sec. lost when zoomed lens seems tight when mounted comes back when not zoomed

Is the lens a little loose when mounted on the camera? That may account for the intermittent contact. If you've not had the lens long consider returning it to the supplier as possibly faulty.

John

ok thank you

i took this lens off{ a} setting two or three times and returned to {a}now works fine thanks again

Good news. Probably a dirty contact inside the lens.

John