Does anyone use a mini prism set to stake column lines? I??ve been in the field for 7 years but have only don??t column lines 3 times. I??m not particularly fast with a plumb bob. Is a mini prism set accurate enough??ÿ
The 30 mil o/s ruins it, try tilting the prism when pointed at an instrument that is locked on and watch the distance and elevation swing a few hundreths, no such swing with the 17.5 o/s.
Oh I'm curious about your experience with the mini prism with -30mm as when i do controls with target prisms, i do not have such problems with -30mm targets
For control shots the minus 30 is usually to a bigger piece of glass and the distance is farther, for close up tight staking the difference between the nodal center and the pivot point of the prism assembly makes for some slop that would normally be acceptable but if you are shooting for millimeters you want to remove what you can.
It is my opinion that the Leica folks have it right when it comes to prism offsetting and housing while just about everyone else has it wrong, which is weird.
When working with columns.. be extremely careful which prism you use when doing any measurement ontop of a column. Most prisms are fine when used in horizontal plane.. but as soon as you're measuring under steep angles, then you can't use 360prisms.
Where can I get a monopod like that? The only one that I see is for use with the seco 6000 miniprism and it attaches to the top of that prism. I would like one like in the picture to use with my sliding mini prism seco kit that I have. I assume the clamp is not small enough on the mini poles, but I bet I could glue some rubber inside of it to make the diameter smaller to fit.
It is a combination of the Seco 6000 with a RAM Ball mount to standard 1 1/4" prism pole. I have 3d printed plastic adapters to make the pole clamp fit the small diameter slide prism pole.
It is a combination of the Seco 6000 with a RAM Ball mount to standard 1 1/4" prism pole. I have 3d printed plastic adapters to make the pole clamp fit the small diameter slide prism pole.
