alythall
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Posts posted by alythall
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Hi
I've just bought a custom built 150mm f10 refractor. The build quality is good, Edmund Scientific lens, Celestron focuser, nicely baffled, but I've tried it out tonight and have been disappointed.
Using a trusted 25mm TAL plossl, I can't seem to "snap" into focus and the image is just a bit blurry. There's quite a bit of CA. I thought it would be relatively crisp and contrasty at f10.
I've used many refractors before and have never had this problem - could it be a collimation issue? Am also using a new diagonal for the first time (StellaMira dielectric), so is that the likely culprit? Any ideas welcome!
Thanks
Andrew
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Brilliant, thanks very much!! Tightened up the three screws in the housing, fixed it a treat 👍🙂
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Hi
I wonder if anyone might help solve a problem with a Bresser hexafoc unit that I’ve just received. Turning the focus knobs does nothing and upon disassembly I note that the rack has retreated up the barrel so far that it is disengaged from the pinion. I’ve undone every screw but can’t get the focussing tube to move at all so cant reengage the rack with the pinion. I attach some pictures; any ideas on how to fix this?
with many thanks
Andrew
Unbranded refractor?
in Discussions - Scopes / Whole setups
Posted
Thanks for the help all - I took a look at it, it's a Meade 102mm achro. Had a bad experience with a Meade frac previously so left it. Cheers!
A