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same SVBONY 3-8MM clickzoom eyepieces have different focal points in binos

Eyepieces
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#26 vineyard

vineyard

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Posted 05 March 2024 - 06:31 AM

I splashed out for a pair for BV'ing.  Haven't really had a chance to use them at night as conditions have been awful.  But in testing on terrestrial targets in the way distance, have been able to merge them at 3mm (in a pair of APM BT70s) without any problems.  Very pleased with that, although I want to test that on the moon for sharpness and edge of field.

 

Each sits slightly differently, so you do have to tweak things a bit.  I may mark one as L & the other as R in the long run.

 

They're not parfocal across the settings (most adjustment needed at the 3mm setting).

 

And while I haven't had a chance to do a SBS comparison with a Nagler 3-6mm yet, they looked pretty pleasing.  Their FOV is also in between the Nag zoom and the Delites, and with the 3-8mm range, they could work very well for me across a range of uses (my shortest fl Delites are 9mm) if they pass muster on the SBS.




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