spectro-aras.com

Congratulation Joan! Antoni and you each deserve a medal for the work and effort that should have been done by Meade. Very disappointing, but not surprising, the lack of manufacturer support. It certainly looks that, thanks to Meade not helping, you will end up with an even better mount. Thanks for ...

Hi Tom, Thanks for your interesting comment. While I have an excellent dark-skies observatory I no longer use it as I only get to visit the site one night at the weekends, with no guarantee of a clear sky, and my city skies are very limited due to a neighbour's tall trees and buildings. My current t...

An excellent initiative Robin. After 26 of spectroscopy (from a Rainbow Optics grating, through, S100, Lhires3, eShel, LowSpec and UVEX) I've finally come around to the Alpy 200 and 600. For a variety of reasons, which I won't bore you with, I need to mainly move away from 'bright' higher res spectr...

Hi Stephane, Thank you for your explanation. I also have PRISM but never mastered all it capabilities. I only used the basic imaging module and then abandoned it for Demetra (eShel) ... but I still use ISIS for processing. If I ever decide to automate my eShel acquistion, unlikely, you may have me c...

Well done Olivier and 2SPOT ... reliable and successful remote operations are a challenge! Is your eShel operation fully automatic or manually remote? In other words is the location and positioning of the target star on the 50um fiberoptic 'slit' completely automated? If yes, can I ask what setup, h...

Congratulations to 2SPOT for a job well done, from another southern hemisphere (Australia) eShel observatory.
Unfortunately this nova is not visible to me until very late at night.

Unfortunately, my weather is all cloud, or rain, these days so It is a case of 'If I could, I would, but I can't'.

I am certainly interested in a ALPY 200, but can't, at this stage, give a firm commitment to buy one as I need to consider some other factors.
Are there any plans, if it is even possible, to allow the grism to be swapped for a different one, e.g. 200, 300 or 600?

Hi Berthold,

Can you give us some details of your new lens ... achromats used, spacings, etc?

Cheers,
Bernard

Hi Daniel, Berthold, Olivier,

The news about the Sablowski Petzvall lens is most interesting and encouraging.
When can we expect to learn more about its performance, availability and cost or, if is a DIY project, can we have the details on how to build our own?

Cheers,
Bernrd

Just a quick update on this problem. I finally got around to digging deeper into what was causing the merged orders wavelength shift, over 20A at Halpha, and it was a faulty def_order.lst file!

Cheers,
Bernard