I have a Brandon 94 (640mm fl) and DenkII/Powerswitch/Newtonian OCS. Wondering if anyone has any good ideas on how to get to high power (150-300x) without having to resort to short focal length eyepieces.
With the OCS in high power mode (2.5x), I have an effective focal length of 1600mm. To get to 300x, I would need a 5.3mm eyepiece which doesn't sound like a great choice having read posts about troubles merging below about 10mm and the posts about it being better to magnify as much as possible before any binoviewer prisms to minimize optical abberations. Thanks.
Dave Adams
With the OCS in high power mode (2.5x), I have an effective focal length of 1600mm. To get to 300x, I would need a 5.3mm eyepiece which doesn't sound like a great choice having read posts about troubles merging below about 10mm and the posts about it being better to magnify as much as possible before any binoviewer prisms to minimize optical abberations. Thanks.
Dave Adams