Taking up scouring Ebay again for a solar filter and/or right angle eyepiece for a GTS-255; found same for a GPT 1003, but can not find the specs on the objective lens. Mine is a 45mm. Anyone have a GPT 1003 who could either look in the manual (can't find one on line...I've looked), or just measure the diameter of the outside of the objective lens tube? TIA.
I don't know how useful this is, but here's the info from the GPT-1001/1002 manual:
Jim:
Thanks. That looks like it might work.
rfc, post: 355439, member: 8882 wrote: Jim:
Thanks. That looks like it might work.
The same seller on ebay hass the right angle eyepiece too. Might come in handy if you are planning on doing solar observations.
vern, post: 355451, member: 3436 wrote: The same seller on ebay hass the right angle eyepiece too. Might come in handy if you are planning on doing solar observations.
I saw that. I'm confused about how it works though. It looks like you look into the end closest to the elbow, with the other, (internally threaded) end going on (or replacing) the existing eyepiece. My eyepiece unscrews and is about a centimeter in diameter. It's hard to tell the scale of the unit on eBay.
I would have thought for it to work at high angles (low zenith angles), you'd want to connect the elbow end to the scope and look in the longer end.
Has anyone ever actually used one of these (and still remembers how :-))? Any photos of a unit in action? This grasshopper could use some help.
I've never used one like that one. The last solar I did was with a Wild T-1, a piece of paper, HP41CX and pocket ephemeris.
I've never used a solar filter, but do own a right angle eye piece.
you remove the existing eyepiece, screw on the right angle eye piece, and then put your eye piece into the right angle eye piece. Sounds complicated, but it is pretty simple once you do it once or twice.
Jimmy Cleveland, post: 355544, member: 91 wrote: I've never used a solar filter, but do own a right angle eye piece.
you remove the existing eyepiece, screw on the right angle eye piece, and then put your eye piece into the right angle eye piece. Sounds complicated, but it is pretty simple once you do it once or twice.
Does it look like the one here? Does the long end screw into the eyepiece? It seems the long end would bump into the "yoke" of the total station before you got to a zenith angle of around 40 degrees, but I could be wrong there. 
rfc,
I googled it this morning and found some images of them connected to instruments. The aluminum colored piece screws onto the instrument and apparently you move existing parts of the instrument to the other end.
vern, post: 355573, member: 3436 wrote: rfc,
I googled it this morning and found some images of them connected to instruments. The aluminum colored piece screws onto the instrument and apparently you move existing parts of the instrument to the other end.
Cool. I did too, and just now clicked "images" in google and found one. I see how it works now. I think the white end does indeed screw on the larger ring around the eyepiece that covers the adjustment screws for the reticle, NOT the threads for the eyepiece itself, which screws off and then (presumably) on to the other end just as you suggest. Thanks again.
I own both a solar filter and a 90å¡ adapter for Topcon GP3000. The larger diameter part of adapter attaches to the instrument. You do not need nor would you want to use the 90å¡ adapter for a sun shot. The sun is not that high above horizon in am. Just plan your solar observations to morning or evening.
Drop me an email Rob, you can borrow the solar filter.
The adapter is very tricky to see through. If you feel adapter is needed, I think 45å¡ would be more appropriate.
rfc, post: 355470, member: 8882 wrote: I saw that. I'm confused about how it works though. It looks like you look into the end closest to the elbow, with the other, (internally threaded) end going on (or replacing) the existing eyepiece. My eyepiece unscrews and is about a centimeter in diameter. It's hard to tell the scale of the unit on eBay.
I would have thought for it to work at high angles (low zenith angles), you'd want to connect the elbow end to the scope and look in the longer end.
Has anyone ever actually used one of these (and still remembers how :-))? Any photos of a unit in action? This grasshopper could use some help.
The eyepiece would be replaced by a solar reticle, in the case you describe were you to remove just the eyepiece. The right angle eyepiece would require removal of the assembly that the eyepiece screws on to.
The GPT-1003 was built on a different frame, like the GTS-210/220 series total stations. I do not recall if the EDM assembly was the same but I think it was.
The Solar Filter I have goes on the down range side of the instrument lens, similar to a lens cap.
I don't know how this compare to the GPT-1003 or GTS-210/220
I have two Sokkisa OF1 solar filters.
They slip over the objective lens of an older instrument and will slip into the sun cover for newer instrument.
Sun Filter currently on EBAY is the same as I have.
