Glm50c diagonal measurements
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What is the best way to measure diagonals with this? Eg for squaring frames. Is there a corner adaptor available for the screw mount datum.
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Hello adc101
Depends what you want to do. If you want to measure a diagonal inside a frame, this is unfortunately not the best tool. The GLM 80 or 100 c would be better as they have the pull out leg at the back for getting into corners. The 50c will only give you a near as damn it result at best. You'd be better off reach for the framing square for frame squaring if all you have is the 50c.
The 50 c can work out diagonals for you though. Go to the menu, select the triangle icon, take the horizontal and virtical measurements and it'll supply the diagonal measurement for you. Likewise, the same function can be used if you can't access a horizontal but need it's legnth for instance. take the virtical and diagonal measurements, and bingo. 
I was really dissappointed when I found out my 50 c didn't come with a pull out leg for corners. Especially as I'd just sold my 80 to bloody buy it!! Oh well. 
Tbh, mine is mostly used for working surface areas for costing which, connected to your phone, it's bloody brilliant for. 
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Many thanks. That was what I was expecting tbh. I had in mind squaring window and door frames. Shame that there is no corner adaptor that could screw into the tripod mounting, for which there IS a reference datum, or similar?? It woud make sense! As you say, its a pity that the product does not have such a helpful feature when the other versions do.
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No probs.
Point of note is that the versions with the pull out leg are more expensive - and have a built in Li battery, which is a bonus and should be standard.
In the absense of a pull out leg, I know what you mean, it would have been nice to have some kind of reference datum to fill in the blank of the impossible to reach corner for calculating an accurate internal diagonal. Would still have been easier to add a pul out leg. Oh well.
One thing that did occur to me for checking square with a 50c is firstly, check the lengths of the virtical and horizonal are the same on your frame, then use the spirit level function for level. If the virticals and horizontals are the same length and level, you're square.