Explore Scientific 2x Focal Extender, 2"Selling because I have finished my eyepiece collection and no longer need barlows. I bought this new 2 years ago and, accept for a few set screw scratches on the barrel, it is in perfect condition.
I highly recommend this for Dobsonians and folks with decent weight mounts. This guy has some weight to it so don't buy if you have a flimsy mount. Otherwise this ES 2x focal extender is crystal clear and indistinguishable when used with a 7mm eyepiece versus a 3.5mm eyepiece. ES Focal Extenders also use a positive lens design that cleans up some chromatic and spherical aberration, making them great for both photography and visual astronomy.
I've used this with both 2" and 1.25" eyepieces and it works great!Comes with original box, 1.25" adapter and both end caps.
Filed under: Eyepieces & Accessories