Why would you reverse a camera lens ?

[BADGER.BRAD]

Hello All,

Just looking through the manual for my newly acquired Praktica PL Nova L and in the accessories section it displays a lens reversal ring so that you can attach the lens to the camera using it's filter threads ,why would you wish to do this ?

Cheers

 

[medwaygreen]

Macro/Micro

I have a reversing ring for my Nikkor lenses.

 

[mickledore]

Increased magnification. A cheap way into macro.
You can also reverse a lens onto the front of a lens already attached. That gives some intense magnification, but non existent DOF.

 

[Deleted member 49428]

Yep. A 50mm reversed gives you around 1:1 and a 24mm gives IIRC 2,8:1

 

[skysh4rk]

Hello All,

Just looking through the manual for my newly acquired Praktica PL Nova L and in the accessories section it displays a lens reversal ring so that you can attach the lens to the camera using it's filter threads ,why would you wish to do this ?

Cheers

Macro

Edit: There appear to be two threads for this question.

 

[StephenM]

Lenses are normally corrected to give best performance at infinity which means the lens/subject distance is greater than the lens/film plane distance. In close up work, this relationship tends to alter and even reverse (subject closer to lens than film is) so turning the lens round improves the performance.

 

[FujiLove]

This thread's like watching The Prestige. I expect Bowie will post a comment shortly.

 

[BADGER.BRAD]

Thanks all, again proof you learn something new each day !

 

[joxby]

I did dat once
A 70-200 zoom with a reversed 50 on the front
It was a zoomable macro lens, interesting but not surprisingly unsuccessful...the barrel roll bokeh sent my eyes wappy...
Posted before somewhere -

feathery headgear

zoomed