|Brand and Model:||BW-Optik 30mm 80˚ Ultrawide|
|Type:||Ultra Wide Angle|
|Focal Length:||30 mm|
|Apparent FOV:||80.0 degrees|
|Field Stop Dia.:||41.0 mm|
|Eye Relief:||22 mm|
|Description:||This eyepiece provides low power deep sky observing for large nebulae, galaxies, and starfields with highest contrast and highest transmission. |
The BW-Optik Ultrawide employs 5-element design (not Erfle). Ultrawide uses fully multicoated high index glasses producing high transmission. This high light transmission is visible when you push your telescope to its magnitude limit. The Ultrawide has 22mm eye relief and no kidney bean effect. Ghost images are totally absent.
Using Lumicon Nebula filters on planetary nebulaes you will not be at a disadvantage against other much more expensive models. The lightweight design weighing just 1.2 pound makes it very comfortable when using Dobsonians with critical balancing issues.