Jan Ströher

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Posts composed by Jan Ströher

The iOptron GEM28 on special offer in September

September 1 2023, Jan Ströher

The summer is coming to an end and in most places the holiday season is also almost over… but there are still reasons for us to look forward to the coming autumn, astronomically speaking. Firstly because it gets dark earlier, which means we have longer nights for our hobby, and secondly because the GEM28 mounts from iOptron are available at affordable prices in our special September promotion – and the full range is available from stock! The GEM28 is perfect for mobile astrophotography. It can carry up to 13kg, but its compact design and low weight means that it can be taken almost anywhere. Compared to iOptron’s centre-balanced CEM mounts, the GEM series is a classic equatorial mount featuring the latest technology and a slim design. The GEM28 has been on the market for around two years, and enjoys great popularity among both astrophotographers and visual observers who are looking for a very good EQ5-class mount.

GEM28 GoTo iPolar LiteRoc

You can save a lot of money in September on these GEM28 models:

As always, the following applies to this offer which ends on 30 September: the items included in the offer are available from stock only while stocks last!

(Promotion period 01 to 30 September 2023)

Tags: Goto, iOptron, Mount, Astro Photography, offer
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August promotion: iOptron CEM40 now at reduced prices

August 2 2023, Jan Ströher

CEM stands for centre-balanced equatorial mount, that is a mount supported at its centre of gravity, thanks to its design. This means that a lighter counterweight can be used, and it offers an excellent ratio of mount weight to carrying capacity: a CEM with a relatively low own weight can carry a comparatively heavy optic.

We are now offering the CEM40 series of mounts from iOptron at reduced prices for a limited time until 31 August!

The CEM40 mount weighs just 8.2 kilogrammes, but can carry optical instruments and accessories weighing up to 18 kilogrammes. This excellent payload/weight ratio of 2.5 is the reason why the CEM40 is so versatile. You can transport them to the best dark sky observation sites, or mount them on a small column in your garden observatory.

The following models in this series are available in August at a discount:

CEM40 GoTo with LiteRoc tripod and carrying case – 63903

CEM40 GoTo LiteRoc – 62121

CEM40 GoTo with tripod – 61904

CEM40-EC GoTo high precision encoder with LiteRoc tripod – 62122

CEM40-EC GoTo high precision encoder with tripod – 61906

As always, this promotion is on a “first come, first served” basis and only as long as stocks last!

Promotion period: 01 to 31 August 2023.

Tags: Astrophotography, Sale, accessories, CEM, iOptron, Mount
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Meade LX85 & LX200 on special offer

July 26 2023, Jan Ströher

From 15 July up to and including 31 August 2023, we are offering the following models in the LX85 and LX200 series from Meade at special summer-saver prices:

N 200/800 Astrograph LX85 GoTo for €2,799 instead of €3,299

This Newtonian is a compact, very fast device (f/4.0 focal ratio) for high-resolution astrophotography with short exposure times. It is especially suitable for large emission nebulae and galaxies. Despite the fast focal ratio and its optimisation for photographic purposes, it is also a pleasure to use for visual purposes – especially for deep sky objects! The large focuser with 1:10 fine adjustment ensures a bright image field and precise focusing. The secondary mirror struts are kept extra thin to cause as little obstruction in the light path as possible, which results in better contrast. With a generous 83.2 millimetre of back focus, there is enough working distance for other accessories, such as a coma corrector or filter wheel. Astrophotography with this fast focal ratio will definitely require a good coma corrector to obtain sharp and point-shaped stars across the entire field of view. A coma corrector may not be necessary for this Newtonian when combined with smaller camera sensors or for purely visual use.

The scope of delivery includes an 8×50 finderscope, a 35mm extension tube (important for visual use), a 26mm Super Plössl eyepiece, as well as a fan to ensure faster cooling for the primary mirror.

The LX85 mount is designed with mobile astrophotography in mind. With its powerful servo motors and Meade Smart Drive technology, it follows the rotation of the night sky and keeps the telescope aligned with the selected object for long exposure times – without the need for a meridian flip!

Meade LX85 Newtonian 200/800

ACF- SC 203/2032 UHTC LX85 GoTo for €3,669 instead of €4,580

With its Schmidt-Cassegrain design, this telescope leaves nothing to be desired: SC telescopes are suitable for all applications. No matter whether you want to observe planets, distant nebulae, or galaxies, whether purely visually or also for photography: anything is possible with a SC telescope!

The compact optics ensure low leverage stress on the mount and mean that the telescope is easy to transport. Focussing is carried out internally and is so adjustable that, even with astrophotography accessories attached, focusing is not a problem.

The LX85 mount is particularly lightweight and therefore ideal for mobile use either in the garden or at an observation location under particularly dark skies, and the GoTo AudioStar control helps you to correctly align the telescope and it automatically tracks your chosen observation object. This makes it ideal for beginners! The LX85 mount can be used with most commercially available telescopes up to 15kg in weight.

We have significantly reduced the prices of the following models from the Meade LX200 series :

ACF-SC 305/3000 12″ UHTC LX200 GoTo without tripod for €6,399 instead of €7,999

ACF-SC 254/2500 10″ UHTC LX200 GoTo for €5,279 instead of €6,619

ACF-SC 305/3000 12″ UHTC LX200 GoTo for €7,679 instead of €9,589

Meade ACF-SC 203/2000 8″ UHTC LX200 GoTo telescope

ACF-SC 203/2000 8″ UHTC LX200 GoTo for €5,119 instead of €6,419

ACF-SC 203/2000 UHTC LX200 GoTo without tripod for €4,479 instead of €5,590

ACF-SC 254/2500 UHTC LX200 GoTo without tripod for €5,269 instead of €6,190

The LX200 series of telescopes are among the systems most widely used by experienced amateur astronomers. There is a good reason for this: the LX200 series combines coma-free ACF optics with a stable fork mount and modern electronics. The system is so compact that the smaller models are ideal for mobile astronomy and the larger instruments suit relatively small garden or club observatories.

In addition to the advantages of the telescopes themselves, the LX200 series offers other useful features: the primary mirror lock prevents image shift and holds focus during long exposure times. The high-quality worm gear on both axes ensures smooth running at all speeds. Thanks to SmartDrive, the periodic worm error is permanently corrected (PPEC).

All models covered by this summer sale are available from stock! This promotion is valid until 31 August 2023 only while stocks last!

Tags: Schmidt-Cassegrain, Goto, ACF, LX200, telescope, Astrophotography, Newtonian, MEADE
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The PrimaLuceLab experience

November 24 2022, Jan Ströher

PrimaLuceLab, the Italian manufacturer from Porcia, specialises in high-end astronomy accessories. Products includes the high-quality PLUS range of prism rails, support rings and clamps, together with adapters, guiding systems, radio telescopes and a variety of products for holistic astrophotography solutions. PrimaLuceLab’s aspiration is to make astrophotography uncomplicated and accessible for all – this aspiration is fully realised with their specially developed PLAY software and their EAGLE, ECCO, ARCO, GIOTTO and SESTO SENSO series of products. The aim is to create a complete package that functions as simply as possible and makes the technology behind astrophotography as convenient for all users as it can be: a PrimaLuceLab experience, so to say.

PrimaLuceLab EAGLE control unit

When combined with the PLAY software, this system comprising various PrimaLuceLab products offers a complete set-up for all telescope models, regardless of brand. The PLAY software is very clear, user-friendly, offers an all-in-one solution with full ASCOM compatibility and works providing you use at least an ESATTO micro focuser or the SESTO SENSO 2. Instead of various software applications, you have everything combined in one clear and simple solution – indeed the name PLAY suggests the simplicity of the application – which allows even beginners to engage in astrophotography in an uncomplicated (yes, playful) and yet immediately successful manner. All other PrimaLuceLab products can be controlled using this software.

The ESATTO micro focuser

Functionality and technology are continuously tested and further developed by PrimaLuceLab. Products are always checked in the in-house workshop before they are sent to the warehouse or prepared for shipment. I was able to see this for myself during a visit to the company in October 2022. There, the founder and president of PrimaLuceLab, Filippo Bradaschia, gave me a live demonstration of the PLAY software functionality using a complete set-up comprising a Sky Watcher AZ/EQ5 mount, a cooled QHY163 monochrome camera, PrimaLuceLab EAGLE/ARCO/SESTO SENSO products, together with a Sharpstar 80mm apochromatic refractor. I was impressed by the overview of the operation as well as the functionality! The software even replaces the mount’s hand-held control. Filippo Bradaschia compares this to buying an Apple©™product: PrimaLuceLab offers you a complete experience and ensures that the individual components are all compatible with one another: the PrimaLuceLab experience!

Tags: PrimaLuceLab, Mount, Astro Photography, astronomy software, Focusing Motor, controls
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HEM27 – the new iOptron mounts featuring top-class technology!

June 3 2022, Jan Ströher

The recent trend towards hybrid Harmonic Drive mounts is not without reason: they are compact, light, can be used on camera tripods and yet have a high load-carrying capacity, which is far superior to the more basic camera mount. In addition, they are equipped with all the technical features of a large equatorial mount. Due to their design and mechanical construction, they also do not require any counterweight(s) – a further advantage for transportation. This is why the term “hybrid” is used: you have all the advantages of a camera mount, such as quick assembly, easy transportation, compactness and precise tracking of the night sky. All these features are then combined with the advantages of larger equatorial mounts, such as GoTo functions, a hand controller with object catalogue, permanent drive gear error correction (PEC), various tracking modes and a high payload capacity in relation to its own weight – all without a counterweight bar with corresponding counterweight. These mounts’ mechanics provide the perfect balance for your telescope.

HEM27 on camera tripod

iOptron is continuing this trend and introduces yet more innovation with the new HEM27 series. The series consists of three variants: a classic HEM27, one with iPolar and an EC version.

iOptron thereby offers a selection of hybrid mounts to suit all requirements. All HEM27 mounts have a low dead weight of just under 4kg, but a load-carrying capacity of up to 13.5kg! This means that they can also be used for telescopes that would normally only be found on mounts in the mid-range weight class. So you can use a telescope weighing 5–6kg and still have sufficient capacity for astrophotography equipment. This means that you have the choice of a much broader range of telescopes with the HEM27 compared to regular camera mounts, which usually have a load limit of 3–5kg.

A carrying case is included with the HEM series

iOptron has equipped this series with the well-established Go2Nova® software and a database of 212,000 objects – just like the larger CEM and GEM series of iOptron mounts. The internal cable management provides security and order, and a dual saddle plate allows the use of Vixen/GP and Losmandy prism rails. An ST-4 autoguiding port is available as well as built-in WLAN, a bubble level and an emergency brake system which stops the mount if the power supply is interrupted abruptly. When you continue, the location memory means that the mount does not have to be re-aligned and re-programmed for your location. As you would expect from iOptron: all HEM27 models feature extremely quiet and smooth stepper motors.

The HEM series will be available in summer. You can find first details here at Astroshop!

Tags: equatorial, photo mount, Goto, iOptron, Mount, Astro Photography, News
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Tecnosky OWL – magnificent, sharp focusing apochromats

January 27 2022, Jan Ströher

A few years ago the Italian company, Tecnosky, started producing their new, own-brand triplet apochromats known as “OWL”. The first model in the series was the OWL 80/480 apochromat, which was released in spring 2021. The OWL 90/560 was hot on its heels, with the OWL 130/900 SLD soon following in autumn. Soon the range will be blessed with new 70mm and 125mm aperture models. All OWL telescopes are based on a triplet lens design with FPL53 fluoride glass. However, the soon-to-arrive 125mm OWL will be an ED doublet.

The OWL 90/560 triplet

These features, combined with fully multi-coated lenses, blackened lens edges and a lens hood on the tube guarantee Strehl ratios upwards of 0.95! An optical interferometric certificate is attached to every single OWL telescope. Every specimen, therefore, undergoes a detailed quality check before distribution.

Optical test report (certificate) for OWL devices

These compact apochromats are great devices for astrophotography and also offer first-class, pure-colour image quality and joy for observing. Tecnosky also supplies reducer-flatteners calculated to suit the optics for each model. This means that OWLs, with their aperture ratios of f/6 – f/7, are ideally suited to photography.

Aesthetically, these “owls” also make an impression – they are all manufactured from high quality materials, are multi-coated, elegantly manufactured and have a white, black and red colour scheme to complete their look.

OWL 80/480 with FPL53 fluoride glass

All OWL models come with compatible prism rails, pipe clamps, Vixen viewfinder shoe, carry handle and retractable dew shield. These are this apochromat’s main features alongside the rotatable focuser with 1:10 reduction and locking mechanism, as well as a sturdy carry case. All in all, you get a first-class telescope with numerous great features for a reasonable price for this size category. The OWL 70 and 125 models will be available in our shop from spring 2022.

Discover the Tecnosky OWL series and sharpen your view of the night sky – elegant design included!

Tags: Astrophotography, Deep-Sky, planets, refractor, Triplet, Tecnosky, Apochromat, FPL 53, OTA, Astroshop, telescope
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The new RedCat 71 from William Optics

December 15 2021, Jan Ströher

The time-proven and much loved RedCat 51 by William Optics has a new big brother – the RedCat 71. The same Petzval design with corresponding high-quality optics using FPL53 and FPL51 optics. With its 71mm aperture, the new “Cat” is a lot more powerful than the RedCat 51. The result is a pure-colour, corrected image field with a diameter of over 45 millimetres – ideal even for full-frame cameras! The fast f/4.9 aperture ratio facilitates short exposure times. At 3kg, the 335mm-long RedCat 71 weighs only slightly more than its smaller brother.

Once again, focusing is helical, adjusted by turning a ring on the lens tube.

The telescope comes with a protective carry case, as well as a Bahtinov mask specially designed for the RedCat. This mask aids focusing and is permanently and precisely fitted in the lens adapter.

The RedCat 71 is also perfect for deep sky astrophotography and offers not only impressive optical performance, but also William Optics’ attractive trademark design.

The new RedCat 71

To use the RedCat 71 for astrophotography you need a mount with a load capacity of at least 7kg due to its weight. The new iOptron mounts CEM26 or GEM28 are ideally suited for this.

Reckon you will soon be a “Cat” fan?

Discover the new RedCat 71 and William Optics’ ”Cat” series.

Tags: telescope, Astrophotography, Deep-Sky, refractor, William Optics, Apochromat
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Discover the laser collimators from Farpoint

October 12 2021, Jan Ströher

Just as a car needs regular maintenance to work perfectly, a Newtonian telescope must be precisely adjusted from time to time in order to achieve the best possible optical performance and image quality. This is done by adjusting the mirrors so that the incident light, reflected by the primary and secondary mirrors, converges at a central point from which it is then directed into the focuser. In astronomy, the process of exact adjustment is called collimation. For correct collimation, the secondary mirror must be aligned with the focuser – lengthwise and centred. In addition, the secondary mirror must be aligned precisely with the centre of the primary mirror. Finally, the primary mirror should then be perfectly aligned with the axis now created by the focuser and secondary mirror.

To facilitate this process, there are various tools available to ensure the telescope’s collimation is as accurate as possible. Laser collimators in particular are very popular, as the laser beam can be used to precisely simulate the incident light in the telescope tube and align the two mirrors so that the laser beam is centred and directed into the focuser. Due to the red colour of the laser beam, the whole exercise becomes visually easy and ensures that even beginners can manage a fast, simple and effective collimation.

Collimation set from Farpoint

There are of course high-end devices among the range of collimator lasers, such as those from the American manufacturer Farpoint. This company produces and sells several collimator sets with 1.25″ and 2″ collimator lasers, with either 635nm or 650nm wavelength, as well as a robust padded case, in which the collimator can be stored and transported nicely protected from dust, moisture and other influences.

In our shop you will find the various high-tech lasers from Farpoint to suit your individual needs. Just take a look and perfect the performance of your Newtonian telescope!

Tags: Laser, collimator, newtonian telescope, collimator laser
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Experience astrophotography with the Radian Raptor

November 3 2020, Jan Ströher

Under its own brand, Radian, the American telescope retailer OPT is now launching a high-performance, top-quality, and super-portable apochromat with triplet lens design, which has already created a great deal of enthusiastic anticipation among astrophotographers. The Radian Raptor is a light and compact photo machine which, with an aperture ratio of f/4.5, will, above all, ensure amazing deep sky images. With a shorter design and weighing just 1.8kg, the telescope can be attached to photographic tripods and travel mounts such as the Skywatcher Star Adventurer or the iOptron SkyGuide without any problem. This makes it a perfect travel companion that can be easily transported in the padded backpack supplied and fits in any hand luggage.

OPT has thought of everything you might need for successful astrophotography in this triplet apochromat:

A fast aperture ratio of f/4.5 allows short exposure times, ensuring that the Radian Raptor stands out as a fast wide-field device – ideal for images of emission nebulae, galaxies and star clusters.

The use of premium glass, coupled with multi-coated surfaces, results in this triplet apo’s colour-true, high-contrast and very sharp imaging capabilities. An already built-in corrector flattens the entire field of view, shows needle-sharp stars right up to the edges and so makes the use of full-frame sensors a pleasure. In addition, there is no need to purchase an additional flattener or reducer.

With a focal length of just 275mm, you have an ultra-compact telescope for extensive wide-field images: objects such as the Veil Nebula or the Horsehead Nebula in the constellation Orion fit completely into the field of view of a full-frame sensor. Here is an image of the California Nebula captured by the 61mm Radian Raptor:

A solid, rotatable 2.5″ rack and pinion focuser with a high load capacity and the 1:10 fine focusing ensure a stable connection to your camera and precise focusing. The hexagonal tube clamps have differently-threaded holes to attach various accessories and integrated cable channels in the clamps reduce cable clutter. Especially for astrophotography, other equipment such as guidescopes, dew heaters, control modules or remote controls are usually required in addition to the telescope itself. The Radian Raptor is designed by astrophotographers and takes all possible applications into account. The recommended back focus of 55mm can be achieved and precisely adjusted with the adapters included.

Another treat is the inclusion of two bars for attaching to your mount: a 4″ Vixen dovetail bar and a 6.5″ universal Losmandy bar with a correspondingly-wider surface area. Both bars also have threads to attach the Raptor to a photo mount. With these you have compatibility with all mounts/dovetail clamps.

Finally, you get a waterproof and padded backpack to safely store the Radian Raptor, which also offers space for a CMOS camera and other small items.

Experience a new chapter in astrophotography and optimise your equipment with the Radian Raptor**!

(**available from mid-November 2020 from us here at Astroshop!)

Tags: camera mount, refractor, Triplet, Apochromat, telescope, Astrophotography, Deep-Sky
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NBX – the new dual nebula filter from IDAS

October 19 2020, Jan Ströher

A new, high quality dual band filter has appeared on the market, in the form of the NBX nebula filter from Japanese company, IDAS. It is especially efficient for nebula photography using fast optics, like the Celestron RASA, for example. Like the existing IDAS (Astro Hutech) nebula filters, the new NBX is of impeccable quality and workmanship.

The IGAD (Ion-Gun Assist Deposition) coating technology which has been specially applied to astronomical filters by the Japanese manufacturer, Astro Hutech, was originally developed for optical communication, where long-term stability (> 25 years) is required in rough field conditions.

IDAS NBX 48mm nebula filter

This leads to filters with robust coatings and durable spectral stability – even at extreme temperatures and humidity levels. This stability is especially important for bandpass curves with steep sides, such as H-alpha, LPS filters and other narrow band filters. Filters with IGAD coatings almost completely eliminate bandpass shifts of +/- 3 or 4nm, which are typical with standard filters.

The NBX is a dual filter which specifically focuses on OIII and H-alpha lines. The NBX‘s transmission curves in the H-alpha and OIII ranges are very clearly illustrated in these two figures:

Transmission curves in H-alpha

Transmission curves in OIII

You can see that the IDAS NBX filter primarily realises its full potential when used with very fast optical systems and astrographs, such as a Celestron RASA, especially fast Newtonian reflectors with f-numbers between f/2 and f/4 and special devices, such as the Officina Stellare Veloce RH 200 Mark II-AT (Riccardi-Honders).

The NGC 281 “Pacman” Nebula in the constellation Cassiopeia

This dramatically increases the contrast within emission nebulae, which predominantly consist of oxygen (OIII) or hydrogen compounds (H-alpha). Additionally, longer exposure times are no longer required, predominantly due to the use of the above-mentioned, extremely fast optics, but also due to the NBX filter’s special contrast effects. The filter is ideal for use with ‘one shot’ colour cameras and monochromatic CMOS cameras. An IR blocking filter is then no longer required. Additionally, the NBX is parfocal with other IDAS LPS nebula filters.

Tags: Astrophotography, IDAS, RASA, nebula filter, H-alpha, Astrograph, OIII, Filter
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