Object Size Calculator
Object Size Calculator
I just received my stage micrometer scale slide, and spent some time last evening playing around with it.
I took field measurements for all objectives both through the visual eyepieces, and the photo eyepiece.
With the photo eyepiece measurements known, calculating the object size from measurements taken from photos with a ruler on the monitor of the apparent field and the object of interest is a simple proportion calculation
Even though it is simple, it took more time than it should, and could be a bit confusing at times, I needed a tool.
So the Microscope Object Size Calculator was born.
You begin by setting it up for your scope. Enter a description of the scope for reference.
Then in the gray area under Results, enter the objective sizes on your scope, and next to that, the directly measured (or known) field size in microns for each objective.
Now save the file, and you are ready to use it.
In the yellow boxes you enter the measurements relating to the object you are interested in. First is the apparent field width. Use a ruler to measure the field as it appears on your monitor. Enter that number. Next is to measure the object of interest, and enter that number next to "Object Measurement"
The unit of measurement is not important, just that both measurements are taken in the same unit, so both metric, both imperial, etc
Once both are entered, the size of the object can be found in the Results section across from the objective size used to capture the image.
The file is an Excel file, and should run on lots of different platforms using excel clones. If you are interested you can download it here:
http://www.homebuiltastronomy.com/mosc.xlsx
Let me know if you find any issues or have suggestions. Feel free to modify and share at will.
I took field measurements for all objectives both through the visual eyepieces, and the photo eyepiece.
With the photo eyepiece measurements known, calculating the object size from measurements taken from photos with a ruler on the monitor of the apparent field and the object of interest is a simple proportion calculation
Even though it is simple, it took more time than it should, and could be a bit confusing at times, I needed a tool.
So the Microscope Object Size Calculator was born.
You begin by setting it up for your scope. Enter a description of the scope for reference.
Then in the gray area under Results, enter the objective sizes on your scope, and next to that, the directly measured (or known) field size in microns for each objective.
Now save the file, and you are ready to use it.
In the yellow boxes you enter the measurements relating to the object you are interested in. First is the apparent field width. Use a ruler to measure the field as it appears on your monitor. Enter that number. Next is to measure the object of interest, and enter that number next to "Object Measurement"
The unit of measurement is not important, just that both measurements are taken in the same unit, so both metric, both imperial, etc
Once both are entered, the size of the object can be found in the Results section across from the objective size used to capture the image.
The file is an Excel file, and should run on lots of different platforms using excel clones. If you are interested you can download it here:
http://www.homebuiltastronomy.com/mosc.xlsx
Let me know if you find any issues or have suggestions. Feel free to modify and share at will.
Last edited by rnabholz on Fri May 20, 2016 6:58 pm, edited 1 time in total.
Re: Object Size Calculator
Hi Rod,
Thanks so much for the link to your Excel program.. I had written something similar last year for personal use, but your is WAY easier to use!...
The Best,
BillT
Thanks so much for the link to your Excel program.. I had written something similar last year for personal use, but your is WAY easier to use!...
The Best,
BillT
- wmodavis
- Posts: 120
- Joined: Fri Mar 18, 2016 5:53 pm
- Location: Highlands Ranch, Colorado USA
- Contact:
Re: Object Size Calculator
Thanks for that Rob.
I have a stage micrometer scale slide coming and was thinking of something similar using Excel.
Think I'll use yours.
Bill
I have a stage micrometer scale slide coming and was thinking of something similar using Excel.
Think I'll use yours.
Bill
Last edited by wmodavis on Fri May 20, 2016 5:37 pm, edited 1 time in total.
Bill Davis
Olympus BH-2/BHS and BH-2/BHT both with trinoc head.
Olympus BH-2/BHS and BH-2/BHT both with trinoc head.
Re: Object Size Calculator
Thanks Bill Davis for your kind comments, but all the credit goes to Rod (rnabholz)!...
BillT
BillT
- wmodavis
- Posts: 120
- Joined: Fri Mar 18, 2016 5:53 pm
- Location: Highlands Ranch, Colorado USA
- Contact:
Re: Object Size Calculator
Yup! Not paying attention. Better change that.
Bill Davis
Olympus BH-2/BHS and BH-2/BHT both with trinoc head.
Olympus BH-2/BHS and BH-2/BHT both with trinoc head.
Re: Object Size Calculator
Hey Rod, that's an elegant tool, nicely done and really useful. I'm going to give it a try asap as it'll be useful for use in the background alongside perhaps image-capturing software. Thanks for taking the time to make this available to us.
John B
Re: Object Size Calculator
Thanks guys, glad you like it.
Let me know if it needs tweaking.
Rod
Let me know if it needs tweaking.
Rod
Re: Object Size Calculator
A great idea, and a very useful and slick implementation. Thank you for sharing it.
Re: Object Size Calculator
What's Excel?
(First one who answers gets another rasberry.)
(First one who answers gets another rasberry.)
Cheers,
Kurt Maurer
League City, Texas
email: ngc704(at)gmail(dot)com
https://www.flickr.com/photos/67904872@ ... 912223623/
Kurt Maurer
League City, Texas
email: ngc704(at)gmail(dot)com
https://www.flickr.com/photos/67904872@ ... 912223623/
Re: Object Size Calculator
My Hat Size
Re: Object Size Calculator
Nice, thanks Rod, very helpful
Re: Object Size Calculator
My pleasure Johann.Johann wrote:Nice, thanks Rod, very helpful