Haven’t you always wanted to “do some science” with your telescope? You can even use just a DSLR on brighter objects!

With just small 4 or 6″ telescope you can easily:

  • detect Neptune’s methane atmosphere.
  • determine any star’s OBAFGKM star-type and temperature from its spectra curve.
  • identify the composition of a star or nebula from its emission and absorption lines
  • detect the cosmological red-shift of a distant quasar!
  • measure the blue-shift of a supernova’s expanding shell as it races towards us at millions of miles/hour.

Unleash your Inner Scientist™

The video below will show you the exciting things you can easily do with an inexpensive grating on your telescope or DSLR:

Periodic Table of Spectra

Looking for our new poster?  Click on this link.

Above: Tom Field of Field Tested Systems showing Neil DeGrasse Tyson our new poster

Pardon our smile!



We’re pleased that Sky & Telescope Magazine awarded our RSpec software their “Hot Product” award. The award is given for product excellence and technical leadership. Our customers tell us the award was well-deserved because our ground-breaking software allows you to easily capture and process the spectra of stars.


In the video below, see Tom Field, the author of our real-time spectroscopy program RSpec, interviewed by Sky & Telescope Magazine’s Dennis diCicco. Hear how easy it is to get started and the wonderful results you can get with a DSLR or a small backyard telescope. Dark skies and big telescopes aren’t necessary! You can probably get great spectra with your current setup, even from the suburbs. Watch this video:



Now you can easily capture the spectra of stars

Our RSpec software is a program that enables you to rapidly go from a FITS, DSLR, or video image to a calibrated spectrum graph – in real-time. Now you can see a star or planet’s spectrum graph instantly, right at your telescope! No more waiting until later to see if you got the spectrum you hoped for.

Getting started in spectroscopy is easy. Use our inexpensive Star Analyser grating (link) or Rainbow Optics Star Spectroscope on almost any camera or telescope. You’ll be able to easily see the spectra of distant stars. You can even use an unguided DSLR camera — no telescope needed.

But, don’t take our word for it — the video below shows the spectra of a bright star taken at 5 frames/second using just an astronomical video camera!

Better yet, see for yourself what’s possible. Check out our sample results page that shows what amateurs just like you have done: link.

In the past, creating an intensity graph from a star’s spectrum was a painful trial-and-error process. But, now, because RSpec displays your profile graph immediately, it’s painless.

No one likes the drudgery of complicated image processing and steep learning curves. Astronomy is supposed to be fun! With RSpec, you can go from a raw image to a calibrated profile graph in just a few clicks. See a star’s spectrum in real-time at your telescope!

Click the image below to watch a one-minute video that shows a live spectrum in RSpec:


Want to see what else you can do in spectroscopy? Check out our Sample Project page: link.

To read more about RSpec, click here.