Product Information

  • First Light: PlaneWave DeltaRho 350 Astrograph

    I had the chance to test the DeltaRho 350 f/3 Astrograph (DR350) with the serial number 0003 – all in all this solution is absolutely remote capable! You can read my first impressions and experiences here: Setup and installation The unit is very well made and in combination with PlaneWave's focuser and de-rotator, it is quite a massive unit and surprisingly heavy. The center of gravity is at the back of the telescope. The PWI4 (beta) software that operates the DR350 telescope installs quickly and works immediately with Maxim DL. If you have problems, take a look at the USB settings in PWI4, which is used to operate the fans, the heating of the secondary and primary mirrors, the focuser, and the rotator. The DR350...
  • The new "f/2" narrowband filters from Baader in use.

    A field report after photographic acquisition of five different celestial objects. From Dr. Claus Possberg, Freyung Observatory (www.possi.space) – October 2022 The use of ultra-highspeed systems such as Celestron RASA, Hyperstar, or special astrographs has revolutionized the acquisition of faint nebular objects in recent years, but requires a special filtering technique that I would like to discuss here. An emission line, such as H-alpha at 656.28 nanometers, optimally experiences very little attenuation when passing through a line filter in the central beam. The world's best filters achieve a good 90% transmission here. However, if the beam passes through the periphery of the telescope system, the emission line shifts slightly toward shorter wavelength light (blueshift). If the filters have a very narrow-band transmission characteristic, the wavelength...
  • The eyepiece series from Baader Planetarium

      The eyepiece is half the optics - and every telescope is only as good as its weakest link. That is why Baader Planetarium not only offers high-quality star diagonal mirrors and prisms (which we present in this PDF), but also several series of eyepieces. Each has its own special features, which we would like to present to you briefly here. Besides, they are firmly integrated into the Baader accessories programme and offer interesting solutions for eyepiece projection and binocular observation. The series at a glance   Classic Hyperion® Morpheus® Ortho/Plössl Aspheric Modular Zoom Focal length 6 / 10 / 18 / 32 31 / 36  5 / 8 / 10 / 13 / 17 / 21 / 24 8-24 (with Barlow 3,6-10,7) 4,5 /...
  • The camera at the eyepiece

    Pitfalls and opportunities In this article we want to show the different ways to enlarge the image or to take pictures through the eyepiece quickly and easily with a camera. These techniques are interesting for photographing the moon and planets as well as for anyone who wants to photograph through an eyepiece - for example, for nature photography through a spotting scope. "Getting closer" is the goal of many photographers. In other words, the longest possible focal length to image the objects as large as possible on the sensor. A practical rule of thumb for astronomers is that the sun and moon appear on the sensor approximately with a diameter of just under one centimeter per meter of focal length. Since long focal length telescopes...
  • Barlow lenses, their magnification factors and working distances

      Again and again the question arises whether a barlow provides the correct magnification at all. It is often overlooked that the magnification factor always depends on the correct working distance - you can read more about this in this PDF using the VIP Barlow as an example: Different Magnifications with the VIP-Barlow # 2406101 To settle this question once and for all, we took a few comparative shots on an ED80/600 telescope with a monochrome camera. Due to the seeing on a hot summer at an outside temperature of  30 °C, the shots of a neighbouring roof were somewhat unsteady, so that the sharpness of the individual frames is only of limited use for judging the quality of the Barlow lenses, but here we...
  • Test Report: Baader Solar Continuum Filter revisited – now with 7,5nm FWHM

    Sometimes it is worth giving things a second chance after many years. Panta rhei, as the saying goes… The Baader Solar Continuum Filter is such an inconspicuous thing that I had largely ignored after a first quick test 15 years ago and which has now completely convinced me in its current incarnation with 7.5nm FWHM: Baader 7.5nm Solar Continuum Filter (540nm) Baader 7.5nm Solar Continuum Filter (540nm) (various versions available) . This is due both to my observing experience and to product development and a larger variety of telescopes now in my reach. Spoiler: Correctly used, it has got an incredible potential – not only to remove the colour aberrations of achromatic lens telescopes as expected, but to my great surprise also when imaging the...
  • Review: visual usage of the Baader OIII 6.5nm CMOS Filter

    In contrast to H-Beta (see the blog post on the 5.5nm H-Beta filter), there have long been options on the market for OIII filters that go beyond the filters marketed as "visual". While the "visual" OIII filters feature half-widths of 12nm and 10nm, respectively, the photographic OIII filters range down to 3nm, which represents a significant contrast gain. I have already had good visual experiences with the 8.5nm OIII CCD filter from Baader Planetarium in the past. When Baader introduced its Baader O-III Narrowband-Filters (6.5nm) – CMOS-optimized (various versions available) in the fall of 2021, I asked if I could borrow the new filter to explore its visual capabilities in observing galactic nebulae. To my delight, I then received the desired filter in both 1.25"...
  • Review: visual usage of the Baader RGB-B CMOS Filter

    March 2021: The idea behind the visual use of blue filters from RGB palettes is that they have much higher transmittances in the blue value and steeper curve slopes than the usual blue filters known from planetary observation - e.g. the Wratten 80A/B/C filters or also Baader's dark blue 435nm and light blue 470nm filters. A CCD or CMOS blue filter allows much more light of the blue reflection nebulae of our galaxy to reach the eye and at the same time filters out the stray light in the green and yellow very effectively. Based on these considerations, soon after the release of their new CMOS filter range, I asked Baader Planetarium if they would lend me a CMOS blue filter Baader RGB B-Filter –...
  • The Baader FCCT with the QHY 268M on the RASA 8 - Step by Step to Perfect Collimation

    If a sensor diagonal of 22mm is ideal for a sharp image with the RASA 8, but if you have got "only" a camera with a diagonal of 28.5mm is available - is a good image possible at all? I tried this out and will describe here step by step my way to the finished image with the Baader Baader FCCT (Filter Changer Camera Tilter) for RASA 8" and QHY cameras (various versions available) an the QHY 268M ( QHY268 M/C BSI Cooled Medium Size APS-C Cameras (various versions available) (various versions available) ) on the RASA 8, especially the adjustment of the overall system. I suggest that you read all this before you try it out yourself! For safety's sake, check every step –...
  • Preshift and further information concerning Baader CMOS Filters

    During the last couple of months after introducing our new CMOS-optimized filter families, we have received lots of positive feedback from our customers. However, there was an increasing number of reports and long discussions about low signal, halo strength and so on, which showed more and more, that the complexity of this topic needs a really detailed explanation. Especially when going to the physical limits, like with our Ultra-Narrowband (UNB) filters, there is no standard solution for every user with different telescopes, sky and weather conditions This situation was intensified because the f/2 Ultra-Highspeed filter category especially needs a more selective categorization, in order to select filters with the correct PRESHIFT, to comply with the f/ratio and the amount of obstruction of the respective telescope...

1-10 of 95

Page:
  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. ...
  7. 10