Lens cleaning issue

[Adam Lewis]

Hi everyone,
I'm after a bit of advice.. I've seen hundreds of lenses on fleabay with fungus and dust inside going for cheap, so I took a dip and bought one for £12, bought some lens cleaner, a brush and a precision screwdriver set.
Idea perhaps being- sort out the lens & resale (though ill probably end up keeping it ) .
However I'm having an issue with the said lens. The back plate screws seem smaller than the 1mm screwdriver bit. Meaning I can't unscrew them? I've looked around online and I can't find a smaller screwdriver?
Is there smaller ones used in production? Or do you suspect my 1mm screwdriver is actually bigger than 1mm? (It is a cheap set)
Thanks

 

[Pete Askew]

Screwdrivers - precision watchmakers

 

[Adam Lewis]

Pete - lifesaver.
Shame that place requires a £10 order and a set is £5.95 ... So I've bought 7 flat heads, 5 Philips and a pack of 25 cloths just to bunk it up
Thanks again Pete

 

[David Mitchell]

Or your could just file down the cheap set small enough to fit the screw?

 

[Adam Lewis]

Bit late for that now though eh
Either way I'll now have a decent set of screwdrivers, the ones I bought were 99p for 11 and they're all wonky and one is broken too lol

 

[Paul Lange]

Yeah, some precision screwdrivers are less precision than others. I used to have two sets allegedly with the same size drivers. One set fitted much smaller screws than the other.

 

[Adam Lewis]

Oh right, thanks for that Paul, I got in touch with the seller as a matter of principle because one of the screwdrivers actually fell apart, I wanted to make them aware of it (I wasn't after my 99p back lol). And they've agreed to send me a new set... Ill compare them and get back to you on that one.

 

[Paul Lange]

I mean same sizes but from different manufacturers. Some are just machined better than others and are made of better metal and hardened properly. Some tools you can buy the cheaper ones and have no problem. Screwdrivers are not one of these tools.