I've just re-acquired the 17ES92 and working on re-acquiring the 12ES92.
Since ES has all but abandonded the ES92's, we are left with only two native focal lengths, the 12mm and 17mm.
So I've been thinking about getting screw on barlows that thread onto the bottom of the barrel, where filters go. One option is the Astro Physics BARADV. Does anyone use the BARADV on their ES92's? Does it give 1.6x or 2x?
Another option is Siebert Optics telecentric barlows, but I do not believe those screw onto the barrel like the BARADV can.
My goal is simple:
12mm can be barlowed 6mm
17mm can be barlowed to ~8.5mm
I'm looking for the most simple solution, that is, a screw on barlow. If it's telecentric, great but I don't think there is a screw on telecentric barlow.
Also, would a screw on barlow have to be threaded to the paracorr 2 if the ES92 is paired with a paracorr 2? or can the barlow be left on the ES92?
Edited by TayM57, 25 March 2025 - 03:16 PM.