Cita:
Ottimo risultato Fulvio! E' pazzesco quello che si può fare con questo economico aggeggino di "filtro"!
Ciao, Diego:
Non ti resta che provarlo: proprio qualche minuto fa ne parlavo con Ken Harrison (Astronomical Spectroscopy Group) che si chiedeva sulla effettiva utilità di tale strumentino
Cita:
Just a question.....
I'd think most members still have, or at least started their spectroscopy experience with a grating. A cost effective introduction.
My question is:
How long does the initial excitement of the grating last? Three months?
Three years?
Once you've obtained a few spectra of the brighter stars and learned the basics of spectral processing (Vspec or Rspec etc) - what do you do next???
What is needed to maintain the interest and sense of discovery after the "honeymoon" period???
La mia risposta:
Hi, Ken:
There's a few simple answers to this question.Notobstanding I own about ten self-made spectroscopes, of various size and perfomance, I still use , more than all others, my S.A 100 grating.I must thank, still now, Robin, that made me buy this device , some years ago.
The reasons of this are :
1- The ease of use: I can at once insert it in the filter holder of my camera, and be operational.
2- I've reached from Rome (terribly polluted area) the 14 mag spectrum with a C14 in half an our , a result not possible with all my other instruments.
3- The versatility: I attached it on the front lens of a 200 mm lens and took very good spectrum (6 A x pixel) with my Canon 550D using the whole aperture and resolution of the grating
4- As I said some time ago, it can be used as cross disperser in simple Echelle spectroscopes
and much more....
The last use, done the day before yestarday, the shot of 2011 fe SN spectrum in M101, here attached, in only 18 mins integration with no guiding (36 x 30 secs).
In simple words: my honeymoon is still lasting
La risposta (spero che tu conosca l'inglese) è indicativa circa il livello di utilità di questo semplice strumento.
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