Being able to download a precooked virtual machine with IRAF and MIDAS is a huge convenience, avoiding the vast amount of wasted time I spent unsuccessfully trying to install IRAF recently. It's a big download at 5GB, but definitely worth it for the convenience. And there are other useful things, like python and PyRAF on there as well.
Knowing nothing about LINUX, I did not dare using LINUX based software like MIDAS, IRAF etc for spectroscopy. But being keen on playing around with spectra obtained with the BACHES spectroscope I overcame my hesitation and installed the Virtual Box and the MIBAS program suite with the help of a Baader collaborator.This help was extremely useful and necessary for me. The installation was successful. Calibration and raw data reduction work fine. The software interface is still in development. Final reduction using reference stars will come soon. I encourage amateur spectroscopists to try out this product.
Nachdem ich mich mit MIDAS und ergänzend MIBAS vertraut gemacht habe im Einsatz des Baches-Echelle Spektrographen, möchte ich mich für den reibungslosen Einsatz mit besonderer Unterstützung von Herrn Roman Gümperlein und Herrn Bernd Koch bedanken und die freundliche Bereitschaft von Herrn Tobias Baader.
Da ich schon Jahrzehnte in gutem Kontakt mit Baader Planetarium und den Spezial-Teams stehe, möchte ich mich auch für die freundliche und kompetente Beratung in den jeweiligen Fachgebieten bedanken. Viele Ihrer Mitarbeiter sind mir sehr vertraut und auch liebenswürdig. Herzlichen Dank!
Da ich bereits mit dem Star-Analyzer, dem Dados Spetrographen gearbeitet habe und auch noch einsetze, möchte ich auch den komplexen Einsatz mit empfohlener Software betonen. Die Beratung in vielfältiger Art möchte ich nicht missen.
Durch das MIBAS Programm wird MIDAS enorm erweitert und auch komplexe Eingaben reduziert und sinnvoll vereinfacht.
Ein Wechsel von MIBAS auf MIDAS et vice versa ist ohne Probleme mit der virtual box in Ubuntu möglich.
Eine Einarbeitungszeit ist im Rahmen der Spektroskopie selbstverständlich!
Mit freundlichen Grüßen
You can unscrew it by hand, there are no tools necessary. To unscrew it, rotate the nosepiece counterclockwise.
The Clicklockk is held in place with the tiny screws at the side, but the noseiece is only screwed onto the body. It is the part Baader 2" Safety Kerf nosepiece with 2" filter thread # 2408156 with a regular thread (an SC-thread).
Answer by: Baader Web Team (Admin) on Jul 3, 2020 8:09:00 AM
Can this filter be used as an internal energy rejection filter for H-alpha solar observation on 140mm and 60mm refractors? The ERF would be placed in front of the diagonal mirror, and the etalon behind the diagonal.
We do NOT recommend this! No filter near focus can replace a front end blocker - as 100% of solar energy hit the filter close in front of the focus position. Front end energy blocking is mandatory for H-alpha work - but not so for white light work.
Why - because in white light you could use a Herschel Wedge Prism to throw away 95.4 % of ALL entering energy - before it even reaches the first neutral density filter or dielectric continuum filter.
This is not possible on H-alpha - you need 100% of the H-alpha wavelength, but preferably zero of anything else. so - in theory - you can do this as you describe - but the filter at that heating point can break on you any second.
Also - all photographic narrowband filters ought to be fully blocked OD 4.0 from 390 nm to 1150 nm - as this is the sensitivity range of almost all CCD/CMOS-chips (most filter suppliers though do not show their blocking efficacy above 700 nm....).
So the 3.5nm H-alpha-filter is surely blocked to 1150 nm - but our front end D-ERF-filters are blocked to 1450 nm - exactly to provide perfect solar safety. Above 1400 nm most optics do not pass IR anyhow.
Answer by: Baader Web Team (Admin) on Jul 2, 2020 7:47:00 AM
I have a Celeston C5, used for terrestrial viewing. What benefits should I expect by using Baader 2" Amici-Prism 45° instead of the supplied diagonal? And it is possible to use a Click Lock adapter on it? If so, what model?
If you have a regular 90° star diagonal instead of an Amici at the moment, the Amici will deliver correct-orientated images like in a pair of binoculars or with the naked eye.
The free aperture of this Amici is larger than that of many smaller Amici prisms which are included with some telescopes, so there is less vignetting with eyepieces with longer focal lengths, but both the C5 and the Amici have only got a free diameter of 26-27mm, so there will be some vignetting with most 2" eyepieces.
It is not possible to replace the eyepiece clamp with a Clicklock.
Answer by: Baader Web Team (Admin) on Jul 1, 2020 3:29:00 PM
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