What do you think the prospects for aurorae are this month? Also, being new tho this how does the sun's rotation affect getting hit? I see 3 factors, sun's rotation, Earth's axial tilt, and Earth's orbit. Axial tilt because of the orientation of the magnetic field.
cheers,
chriso

I may attach a camera on it at some point, I have another non period telescope with the same objective on it that I'll use for a more modern setup. The oscillating slits will ab a tad difficult with this one. I'd need a roof prism to send the light back, or figure out a reliable system of linking th...

Thankyou! This is the document I have been looking for! (Oh, my 108 degree should be 180 in my last post.) What I need now is a day of sun when I'm not working. I would love a double pass unit, but the 25mm prisms I'm using are a tad small. Once I get more precise with my machining I'll add that fea...

John, I believe you are thinking of what happens when you stack equilateral prisms rotated 108 degrees. kinda like this: /\/\/\ Mine are set at the dispersion angle

Thanks! The lower picture is an old one example made in the 1890s, that I used as reference. The one mounted on the telescope is mine. It is pretty heavy, the brass tube is 7 pounds, objective lens 1/2, eyepiece is pretty solid so a pound. The prism plate is another 2+ when it is all said and done, ...

The collimating lens is off in the picture. Is it a full 2 lens telescope, or a single lens? I was under the impression that it was a single lens (or a doublet, but I'm sure you get my meaning) The focal ratio is what I was missing. the telescope is an 80mm f/11.5 (900mm fl) I'll poke through my len...

I believe they are aligned, I used a UV, and a red laser to find the minimum deviation. Here are the pictures, they were on another device... It projects nicely, but I want a 'wider' swath http://i.imgur.com/4ZCh7q8.jpg The collimating lens is off in this picture http://i.imgur.com/AMyY6fb.jpg The o...

I am missing something. While I can get wonderful images projected onto something with the Lockyer, that is about it. So far this is what I have: the focused disc of the sun is on the slit, a lens is then focused onto the other side of the slit and the light passes through the prisms, then a second ...

Have the final form just about there. Need to work on focus and putting a brass box around it to shade the light. That is a Mercury lamp at the end there. I can see the lines, but they are not sharp because it is so lose, I think. I am also putting together a wire diffraction grating to make a littl...

I find it absolutely wonderful that This data is coming out of G.B. In my reading I have come across so much information from Kew and other observatories there. (like Sept 1 1859 the first time a photo of a solar flare and the magnetometer data were lined up )

I'm working the kinks out of a Lockyer style spectrometer, and I am having a few issues. Where should the second telescope focus, the slit? To better explain, as y'all know it goes objective, slit, lens, prism chain, then the second telescope. I'm getting lovely projection of the lines on a bit of c...

WONDERFUL! Only seen it once, had no idea what it was until much later.

Howdy, My name is Chris Olsen, I'm a wet plate photographer (and particle accelerator operator). I am finishing up a replica of the Kew photoheliograph that I plan on lugging downstate and taking pictures the old fashioned way. Here are a couple images of the prototype at a reenactment, and the almo...