Barlow question...

Maybe this belongs in the "Beginners" forum. I have a 1.6x barlow lens that came with my WO binoviewer. This accessory screws onto the nose piece of the WO binoviewer, for use as a barlow. I would like to use this to increase the focal length of the guide scope I am using (an Antares finder scope)as an auto guider. Will I get a greater increase in focal length by having the lens farther from the imaging chip (focal point)? Or is it the other way around, more magnification with the lens being closer to the chip. I can set this up a couple of different ways with the barlow being different distances from the imaging chip in the auto guider camera. I have already used this guide scope to guide my WO 66 and it worked great, but would like to try it with my C8.

Thanks and Clear Skies

Any Barlow is simply a negative focal length lens, named after the Englishman that 1st proposed using as such centurys ago. The Further the lens is from the eyepiece or imaging chip, the greater the magnification factor. This occurs due to the Barlow lens effectively changing the objectives' focal length into an apparently much longer focal length. The new focus point will vary somewhat depending on the barlow-to-imaging chip (or eyepiece) dimension.