Cleaning the rear element of a lens

[@ScubaSteve]

I just bought a used tamron 17-50 off craigslist for 300 bucks.

I knocked the seller down to 300 because it had some dust on the front and rear elements off the lens.

I just removed the plastic part and then the 4 screws on the front element to clean it.

I then removed the back element 4 screws and can not find how to lift up the rear element to clean it.

Anyone know how to clean the rear element? Maybe there's some youtube videos?? I cant seem to find any...

thanks

 

[@ScubaSteve]

bump..

 

[the.cheat]

taking lenses apart is really sketchy...

 

[@ScubaSteve]

yeah, but with this lens, i think a camera shop would ask as much as it cost to fix it

 

[eheath]

Is the dust really in the way? I'd test out the lens and if its a problem then try to clean it.

 

[hollygrove]

Are you shooting photo or video? If you're doing photo you'll be able to take out the dust in post, if you can even notice it. How significant is it?

 

[@ScubaSteve]

Doing 99% video.

And the dust is pretty damn bad. It shows up in video

 

[@ScubaSteve]

even when it's very open'd or closed.

 

[@ScubaSteve]

No one on here has ever taken apart their lenses?

 

[eheath]

started to once with an old prime, about 8 screws in i realized i was going to do damage to it if it went any farther and stopped.

 

[the.cheat]

same, but my focus and aperture got messed up. good thing i had two of them. yay craigslist. also got the orange name back? congrats

 

[dispatchQ_main]

Congrats on the orange name again. Definitley deserve it.

 

[RileySnyderPhoto]

I would never do that myself