Tele Vue 17.0 Ethos (ETH-17.0) 16-20mm L-eXtreme is a two 7nm

L-eXtreme is a two 7nm bandpass filter which can be used with one-shot colour cameras like DSLR's (digital SLR)

Eyeguard Extender raises the eyeguard position by 8mm

3 Accessories Mounting Accessories Rings/V-Rail Included Case Yes Corrector No (optional)

It can achieve excellent color correction even with the magnification mounting to 300× in visual observation

485mm x 102mm x 175mm (19

Tele Vue 17.0 Ethos (ETH-17.0) 16-20mm L-eXtreme is a two 7nmThe 17mm ETHOS is an ideal complement to the 31mm Nagler Type 5. They are parfocal (both have focus locations about 3 8" above shoulder) and the 31mm Nagler Type 5 has exactly twice the true field area. TeleVue is known for its in house eyepiece and telescope designs by Al Nagler; our latest eyepieces brings new meaning to the term "in house." The concept for this eyepiece series was proposed by TeleVue President David Nagler, with performance