Thread: Focus rings
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Old 20-08-2017, 01:51 PM
Herbie (Peter)
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Herbie is offline
 
Join Date: May 2017
Location: Poochera South Australia
Posts: 10
Hi matt thanks for the info for a Sunday morning the old gray matter is hurting a little lol
I'll attach photos of what I got but the skywatcher 25mm is what they send with the scope FOV not sure 55 I think, 9mm is a Celestron x-cel LX 6 element 60* FOV and the 5mm Baader Hyperion I think is 7 element 68* FOV, the 1.25" and 2" EP holders are what they send with the scope I don't have a short one.

By the chart my scope (f5 150/750) min power 24 with 31mm Ep, max is 300 power with 2.5mm EP giving perfect setup and conditions, optimal power between 38-75 normal conditions

My pupil exit roughly is 6mm so with the EP's I have it ranges from 1mm to 5mm.
So given I understood it correctly the 5mm should work, I've been talking to a bloke in my astronomy club and he has Baader EP's and hasn't seen one like this the way mine is set up the focal length will be altered it comes apart in 3 pieces but the 2" adaptor part doesn't come off.
If I use the 5mm in daylight 1km across the paddock crystal clear I can see individual leaves on trees go 2-3km the focus adjuster has less movement and beyond that distance none what so ever just blur in the 2" adaptor it will not focus at all
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