YMO7 Short Throw Lens  
 
When is a short throw lens used? 
A short throw lens creates big images in tight spaces by projecting the largest possible image 
from a short distance. 
 
This is very convenient feature as it allows the projector to be placed at a close distance from 
the screen, and the projector itself does not become a physical obstacle in the room. 
 
Optoma projectors can cast a 72-inch diagonal image from just eight  (8) feet away from the 
screen  with  a  short  throw  lens.  The  short  throw  lens  is  supported  by  the  EP758/9,  EP780, 
EP747, EP739H, EP770, EP773, and H57/ H27. 
 
(See Tables 1 & 2 for a complete guide to Optoma Short Throw Lens projection distances.) 
 
 
 
 
 
 
Environments for a short throw lens: 
 • Small Home Theater Room Settings 
 • Classrooms 
 • Smaller Meeting / Conference Rooms 
 • Trade Show Booths 
 
Optoma’s  short  throw  lens,  item  number  YM07,  provides  a  larger  image  from  the  same  
projection distance – up to 20% bigger. It easily attaches to existing projector lens.  
 
Fitting 
The screw thread on the zoom lens needs to be exposed by unclipping the plastic cover. This is 
the light grey ring on the very end of the lens. Grasp it horizontally and pull away from the 
lens. 
Make sure the projector lens is clean. Wipe with a lens cleaning cloth, if required. Make sure 
the short-throw adapter is clean.  
Line up the adapter lens carefully with the standard lens, the threaded part facing towards the 
projector.  Bring  it  closer  until  the  threads  touch.  Turn  carefully  to  screw  the  adapter  on 
(holding  the  projector  lens  <silver  ring>  to  stop  it  from  turning)  ensuring  it  is  not  cross-
threaded.  It  should  screw  on  with  minimal  effort.  If not,  the  thread  is  crossed,  damaged  or 
dirty and you should check it. 
If  it  threads  smoothly,  continue  to  screw  it  on  -  about  3  whole  turns,  until  there  is  slight 
resistance.