Surplus Shed objectives.
- PalomarJack
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Surplus Shed objectives.
8" f/6 Newtonian on a German equatorial mount, all DIY.
DIY 90mm f/10 refractor on old medium duty Edmund Scientific German equatorial mount.
- JayTee
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Re: Surplus Shed objectives.
Cheers,
JT
∞ AP Scopes: #1: TPO 6" f/9 RC #2: ES 102 f/7 APO #3: ES 80mm f/6 APO
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- Lady Fraktor
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Re: Surplus Shed objectives.
For the price I would think it would make a great project refractor with a good lens.
I forgot to mention, one thing that seems to be common with some of these 127mm is the lens sets may not be set properly.
Some people have reported that one or both lens are flipped but easy enough to fix yourself.
The only culture I have is from yogurt
- PalomarJack
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Re: Surplus Shed objectives.
Ah yes. Had the same problem with the 90mm from them, the crown was flipped. They also used tiny bits of plastic tape for the air space. I was not thrilled with the performance, so I replaced them with .006" aluminium shims. It took some experimenting with different thicknesses, but I got the chromatic and spherical aberrations down to a reasonable level. May not be a Unitron, but it easily reaches Dawes limit. And for $49 US on sale for the primary, it makes an excellent travel scope.Lady Fraktor wrote: ↑Wed Nov 27, 2019 7:14 am The 127mm Wollensak lens sets they sell are reported to be quite good and I have read many favorable reports over the years about them.
For the price I would think it would make a great project refractor with a good lens.
I forgot to mention, one thing that seems to be common with some of these 127mm is the lens sets may not be set properly.
Some people have reported that one or both lens are flipped but easy enough to fix yourself.
Thank you for the information, sounds like I may go through with it. It's eather a bigger newtonian, and mount, or a 5' refractor that will fit on the Edmund Scientific mount the 90mm is sitting on. It depends whether I put up an observatory or not, or not.
8" f/6 Newtonian on a German equatorial mount, all DIY.
DIY 90mm f/10 refractor on old medium duty Edmund Scientific German equatorial mount.
- PalomarJack
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Re: Surplus Shed objectives.
But of course, unless I go extreme retro and build a very, very long simple refractor. I have a big yard, but I think I will leave my amateur radio antennas up, instead.
8" f/6 Newtonian on a German equatorial mount, all DIY.
DIY 90mm f/10 refractor on old medium duty Edmund Scientific German equatorial mount.
- Jones
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Re: Surplus Shed objectives.
The 127 short was a recent one with no collimation rings. Glued wood rings to tube and cell with silicone to make a fast and easy collimation cell. It was the usual short
Triple lensed fracs are so yummy when looking at planets.
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