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Bundle: Hyperion Universal Zoom Mark IV with Hyperion-Barlow 2.25x (8-24mm / 3.6-10.7mm)

Bundle: Hyperion Universal Zoom Mark IV with Hyperion-Barlow 2.25x (8-24mm / 3.6-10.7mm)

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Hyperion Universal Zoom Mark IV + 2.25x Barlow mit 1.25" Steckhülse und montiertem Teleskop-Adapter (B) Hyperion Universal Zoom Mark IV + 2.25x Barlow mit 1.25" Steckhülse und montiertem Spektiv-Adapter (A) Hyperion Universal Zoom Mark IV + 2.25x Barlow mit 2" Steckhülse und montiertem Spektiv-Adapter (A) Hyperion Universal Zoom Mark IV + 2.25x Barlow mit 2" Steckhülse und montiertem Teleskop-Adapter (B)

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Bundle: Hyperion Universal Zoom Mark IV with Hyperion-Barlow 2.25x (8-24mm / 3.6-10.7mm)

# 2454827

Regular Price: € 365.00

Special Price Incl. Tax: € 292.00

Price excl. German VAT tax (19%): € 245.38

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3 Review(s) | Add Your Review

Consists of Hyperion Universal Zoom Mark IV, 8-24mm eyepiece and Hyperion Barlow lens 2.25x
This combination of Hyperion Zoom and Hyperion Barlow creates an all-in-one astro quality grade zoom providing a focal length range (with and without Barlow) from 3.6 to 24mm
Includes all accessories that is delivered in the standard outfit of the Hyperion Zoom and Barlow
- More Information about Hyperion Universal Zoom Mark IV
- More Information about Hyperion Barlow lens 2.25x
ATTENTION: Please note that this set of Zoom+Barlow is only meant for astronomical use. It will not come to focus in combination with spotting scopes

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Product Questions and Answers

Do you have a question about this product? Then we would like to ask you to first look through the existing questions and answers, most likely your question has already been answered and you will get the desired information much faster this way. Your question is not listed? Then please click on the button "Ask a question".

Why is the Barlow not compatible with spotting scopes

Question by: Jan Walschap on Nov 22, 2017 3:00:00 PM | 1 Answer(s)

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Spotting scopes do not work with all eyepieces, because they don't offer the same back-focus like an astronomical telescope. We had to shorten the housing of the Zoom eyepiece to get into focus with all spotting scopes. You really have to fight for every millimeter.

The problem is that the front lens of the scope basically creates an image in a given distance, which is then magnified by the eyepiece. So, you need to get the eyepiece close enough to the front lens. In a spottin scope, the erect-image prism is mounted fix inside of the tube, and you can't get close enough. In a telescope, you can move both prism and eyepiece closer to the front lens.

While a Barlow lense moves the image further to the outside, it has to be even closer to the front lens than an eyepiece - with a refracting spotting scope, you'd have to remove parts of the scope's housing to get into focus. The prism and the internal focusing mechanism are in the way...

So, although you can attach the Barlow mechanically to a spotting scope, you wouldn't be able to reach focus and get a sharp image.

Only if you use a telescope as spotting scope like our C5 Schmidt-Cassegrain spotting scope, you'd be able to use the Barlow - but this only works with a very small number of spotting scopes.

Answer by: Baader Web Team (Admin) on Nov 22, 2017 3:01:00 PM

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do you have an adapter that will attach Mark 4 zoom to a Sony FDR AX53 movie camera? It provides a 55mm filter thread to attach to the camera.
Thanks Jamie Pauley purchasing through Adorama in the US.

Question by: Jamie Lockwood Pauley on Jul 30, 2018 4:37:00 AM | 1 Answer(s)

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Hello,
I would like to know if it is possible to use the 2” astro-nosepiece with SC male thread (n°3 on p.20 of instruction manual) to fix my Canon EOS on the telescope directly with a supplemental EOS ring ?
Thank you for your reply

Question by: Laure on Mar 10, 2021 9:30:00 AM | 1 Answer(s)

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With eyepiece projection, the image at the edge is extremely blurred. What could be the reason for this?

Question by: Anonymous on Sep 2, 2019 11:46:00 AM | 1 Answer(s)

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For eyepiece projection with our Morpheus and Hyperion (zoom) eyepieces, we recommend a distance between eyepiece and T-ring of 40 mm on full-frame cameras, in addition to the 55 mm that were the flange focal distance of all "SLR" and DSLR camera bodies for decades when a T-ring was placed in front. Only with a T-ring that maintains this distance can old lenses with a T-thread deliver sharp images. Therefore, it has been tried to take this distance into account in all designs, because this is the only way to ensure that the sharpness performance is optimal. Of course, all this is only valid to a limited extent today - because the DSLR standard is losing it importance and the term „T-ring“ is all too often reduced to the mechanical thread and not the correct distances. In our brochure on digiscopy, we have therefore stated the back focal distance of 55mm. With a DSLR (full frame or APS-C), this distance is also maintained in good approximation with modern, narrow T-rings, which are intended for use on telescopes, where every millimetre often has to be haggled. For Micro Fourthirds cameras, for example, we have a special adapter that allows both an adaptation with the 55mm standard support dimension and a much shorter adaptation.

Mirrorless system cameras have a much shorter back focal distance than comparatively large SLR cameras. The available T-adapters are usually for use with telescopes with a moving focuser. Here the shorter back focal distance must be compensated by additional extension sleeves, if a certain distance has to be kept.

The example adaptations in our digiscoping brochure thus apply to all T-adapters that follow the T2 standard and deliver a back focal distance of 55mm.
The indicated distances of
min. 40mm spacer sleeve plus 55mm T-2 flange focal distance for full format
min. 30mm spacer sleeve plus 55mm T-2 flange focal distance for APS-C
min. 15mm spacer sleeve plus 55mm T-2 flange focal distance for MFT
were empirically determined (Canon full format, Nikon APS-C (slightly larger sensor than Canon APS-C), Panasonic MFT) and are the values at which the image looked good, i.e. no (disturbing) distortion could be detected in nature photography. However, only the Hyperion Zoom without Barlow lens was used. For decades, we had in principle recommended the 40mm extension; with the smaller sensors, shorter distances (and less magnification) are also possible. The overall length of an adapter ring from the M43 eyepiece thread to T-2 was neglected, or it was regarded as part of the eyepiece.

With shorter overall distances than indicated above, the sharpness in the edges is catastrophic. Only with these distances the image is enlarged in such a way that the entire sensor can be used.

When working with an additional Barlow lens for even more magnification, the resulting effective focal length increases extremely and the system becomes more difficult to control. The thick stack of lenses does not make the image any better, and the telescope opening must provide sufficient resolution, also in relation to the pixel size of the camera. For highest magnifications we therefore recommend the FFC instead of the eyepiece projection in combination with a barlow lens – more on this below.

What can easily be overlooked is that, depending on the camera type and the telescope aperture ratio, a more or less pronounced vignetting is unavoidable.

We regret that we can’t give a binding (or universal) recommendation for an eyepiece-Barlow-lens-combination - for no single eyepiece on the market - where vignetting does not occur. Eyepiece projection is basically a compromise and has been "invented" for planetary photography since the beginning of all photography in order to be able to image a small object in the center of the image with excellent sharpness and very long focal length. The further development of the eyepiece also made it possible to enlarge the usable image area - however, this method is still a compromise. We therefore do not claim that you can achieve perfect sharpness over the entire image field with an eyepiece and a Barlow lens. We also do not claim that you can achieve a completely unvignetted image field!

For exactly this reason - because there has been no solution from anyone in the world (and still is not) - we asked Carl Zeiss-Jena in 1990 to calculate for us a plano barlow lens of any complexity for medium format cameras. Ultimately, this was only possible with two additional crystal substrates made of genuine calcium fluorite (not comparable to simple ED glass). For the Baader Fluorite Flatfield Converter (FFC) Barlow - which can produce an image circle of 90 mm from 4x to 8x - an aperture ratio of 1:10 - as is the case with many refractors - was the basis for calculation at that time. The 90 mm image circle was due to the fact that the famous "PENTAX 6x7" medium format camera was available at the time - with a 90 mm image diagonal.

To this day, this FFC converter lens system is "the sharpest of all Barlow lenses" in the world. And since the full 42mm format uses less than half of the FFC’s 90mm image circle, the FFC works so well even at an aperture ratio of f/5 that it delivers diffraction-limited sharpness even with CMOS chips with ~ 4my pixel size (if the telescope optics and seeing are good enough). However, this only works so well due to the large image distance. If you are looking at the "Baader FFC-Barlow", you will see that the image distance has to be varied between 80 and 150 mm (or even more). So you pay for the excellent optical performance with a very long mechanical construction. Without an excellently stable focuser, this can only cause frustration. Anyhow - You will surely find enough judgments which testify that there is no other projection lens system with sharper - and not vignetting - imaging.

So if photography with very long focal lengths is your main focus, then you would have to replace the combination of the eyepiece with a 2.25x Barlow for a FFC - in addition to the armada of extension rings, which are necessary if you want to use this projection method without mechanical distortion.

Answer by: Baader Web Team (Admin) on Sep 2, 2019 11:47:00 AM

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Is there a lunar filter that you recommend for use with this model, both with and without the Barlow attached? I'm assuming 1.25" but I've not been able to confirm elsewhere. Thanks!

Question by: Adam Burch on Dec 24, 2020 6:37:00 AM | 1 Answer(s)

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Can you recommend a reducer to use with Mk IV zoom? I want to reduce the magnification min/max range ... THX

Question by: Michael on Jan 26, 2017 3:39:00 PM | 1 Answer(s)

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You can increase the max. magnification with the Hyperion Barlow. The combination of Mark IV and Barlow results in focal lenghts from 3,6 - 10,7
To reduce the focal length of your telescope however, in order to increase the field of view (= less magnification) is more difficult. A reducer has to be calculated to optically match your telescope brand and model, otherwise you may not be able to reach focus and the image quality might be horrible, with an enormous amount of field curvature and/or spherical aberration

Unfortunately reducers are not our speciality, since we only offer reducers for very few such special optics. Also please note that the reducers that we do offer (such as the Alan Gee Telecompressor #2454400 - calculated for C8 or higher Schmidt-Cassegrains) are all mainly optimized for photography and cannot be used in combination with prism or mirror diagonals since the optical backfockus just is not enough.

Sorry, this is quite a complex area. For this reason we never offered a "universal" reducer for lowering magnification during visual observation.

Answer by: Baader Web Team (Admin) on Jan 26, 2017 4:31:00 PM

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I have the Zoom Mark IV and 2.25x barlow. How can I attach them (or at least the Zoom) to a Canon EOS RP mirrorless camera to use with my Celestron NexStar 8e telescope? Thank you.

Question by: Clarence Williams on Oct 9, 2021 5:11:00 PM | 1 Answer(s)

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Will I be able to use Hyperion-Barlow 2,25 with the eyepieces from other manufactures and Hyperion Universal Zoom Mark IV with other barrows?

Question by: Kirill on Feb 15, 2021 2:12:00 PM | 1 Answer(s)

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I can't manage to focus my Hyperion Universal Zoom Mark IV when it is on 8mm setting. I am using Celestron Astro fi 6", with 1 1/4 Celestron visual back replaced with Baader 2" ClickLock SC clamp, and a 2" BBHS Prism Diagonal. On all other settings I can focus with no problem. Also will I damage the prism if I use the Barlow that comes in this set?

Question by: Danail Danailov on Sep 8, 2022 9:45:00 AM | 1 Answer(s)

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Can I use Hyperion-Barlow 2.25x with Hyperion 68⁰ 13mm modular eyepiece?

Question by: Michelangelo on Jan 22, 2023 8:56:00 AM | 1 Answer(s)

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Can Hyperion Universal Zoom be used on a camera together with Hyperion-Barlow 2.25x at once?

Question by: zdeněk lébl on Oct 22, 2019 1:04:00 AM | 1 Answer(s)

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Will this Zoom lense work on a Mak-Cassegrain with the way I set mine up?
1) Explore Scientific FL-MC1271900 FirstLight 127mm Mak-Cassegrain & on the SCT
2) Baader #2458270 2in Locking Ring
3) Baader #2957220 Diamond Steeltrack 2" Focuser for SC/HD & using dovetail
4) Baader 2" ClickLock Star Diagonal Mirror #2956100

Question by: Don Johnson on Apr 21, 2023 2:49:00 AM | 1 Answer(s)

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-1

I have a ZWO ASI183MC camera (https://astronomy-imaging-camera.com/product/asi183mc-color/) I would like to use to take images of the moon and planets with my Celestron 6SE SCT telescope. It seems this package would be a good fit, would you agree, and would I need any additional adapters to connect my camera to this?

Thanks!

Question by: James Yoder on Jul 11, 2023 6:38:00 PM | 1 Answer(s)

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-2

The camera has got rather small pixels, so you'll need good seeing, otherwise there will be slight over-sampling - but that's nothing to worry about.
The Celestron T-Adapter (C5, 6, 8, 9-1/4, 11, 14) # 820760 (US-SKU: # 93633-A)
https://www.celestron.de/ce_de/astronomie/zubeh%C3%B6r/fotografie/t-adapter-(c5-6-8-9-14-11-14).html
is designed for a backfocus of 55mm, so you may need some more T-2-extensions to reach the perfect back focus for yuo camera model if you use the T-2-thread. Fortunately, a Schmidt-Cassegrain is not too critical, so you don't need to keep the distance perfectly up to a millimeter.

If you want to use the reducer
Reducer / Corrector f/6,3 - mit 2-Zoll-Innengewinde # 820775
https://www.celestron.de/ce_de/reducer--corrector-f63---mit-2-zoll-innengewinde.html
you should keep to the backfocus for which it designed for (105mm, so it is 55mm, when you use the Celestron T-adapter mentioned above.

In any case, we'd recommend a focus motor like Celestron Fokussiermotor # 821160
https://www.celestron.de/ce_de/fokussiermotor-f%C3%BCr-sc-edgehd.html
It makes focussing much easier, when you can do it frmo the laptop, where you see the camera image, too.

Answer by: Baader Web Team (Admin) on Jul 18, 2023 1:25:00 PM

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-2

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What is the field stop diameter for this lens?

Question by: Chris Lyons on Sep 20, 2017 10:01:42 AM | 1 Answer(s)

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-3

Hello, I already have one of first version of the Hyperion zoom (there's only written Hyperion 8-24mm Clickstop-Zoom (Phantom Group Coated)) and I want to ask you: can I use it in pair with a Mark IV or III with a binoviewer..? Or should I avoid because of different size of the barrel...or different size of exit pupils ? Thank you very much for your answer and attention. Saluti

Question by: Paolo on Aug 16, 2022 3:08:00 PM | 1 Answer(s)

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-7

Its compatible with fast telescopes?

Question by: Petros Rouvim on Sep 8, 2020 12:07:00 AM | 1 Answer(s)

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-8

Does this Zoom EP + barlow work in APM-SD120-APO-90 degree binocular?
Thanks

Question by: Alfred on Nov 22, 2022 9:16:00 PM | 1 Answer(s)

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-10

For use with a binoviewer, should I buy one or two Barlows?

Question by: Rafael Sampaio on Jun 14, 2020 9:04:00 PM | 1 Answer(s)

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-18

If you want to use a Barlow lens, you should always place it directly in front of the eyepiece - otherwise, it would deliver a much, much higher magnification. A binoviewer has got an optical length of ca. 11cm, so you'd probably be way beyond the useful magnification - you can find more information in our PDF "Calculating different Magnifications with the VIP-Barlow" at
https://www.baader-planetarium.com/en/downloads/dl/file/id/240/product/1062/calculating_different_magnifications_with_the_vip_barlow.pdf
The calculations are similar for all Barlow lenses.

Instead of using two Barlow lenses, we'd highly recommend to use different glasspath correctors (GPC) to achieve different magnifications with a binoviewer.

You should use a GPC, anyway, to make sure that you reach focus and to eliminate any colour aberrations which might be caused by the prisms inside of the binoviewer. This way, you can also be sure that the image quality is good – if you use two BArlow lenses, both should be made in the same production run to avoid any small differences which are no problem when you use them for mono-viewing, but which become obvious when bino-viewing. That's also why both eyepieces should be bought together.

And an additional bonus, aside of the quality: One GPC is cheaper than two Barlow lenses.

Answer by: Baader Web Team (Admin) on Jun 15, 2020 8:19:00 AM

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Description

Details

Bundle: MARK IV Hyperion Universal Zoom 8-24 mm eyepiece & Baader Hyperion Zoom Barlow lens 2.25x mag

The set consisting of the MARK IV Hyperion 8-24 mm Universal wide angle Zoom eyepiece (#2454826) and the Hyperion zoom Barlow 2.25x (#2454654) results in combination in a zoom eyepiece with a large focal length range. The set covers all eyepiece focal length from 3.6-24 mm.

This set can only be used on all astronomical telescopes; use with tripods is only possible without the Barlow lens.

MARK IV Bundle contains the following items:

The Hyperion Mark IV Zoom Eyepiece with 2" barrel

The Hyperion Mark IV Zoom Eyepiece with 1.25" barrel

1) 1x Hyperion Universal Zoom MARK IV, 8-24 mm eyepiece with ClickStop Action (#2454826)

Versatile wide-angle zoom eyepiece with connection option for cameras.

Included Accessories:

2 "(left illustration) and 1¼" (right illustration) barrel
2" SC thread and 1 3/8" thread for spotting scopes
Eyepiece holster with belt-strap, which fastens onto many tripod legs just as well, to serve as a bin for all dustcaps that may go astray otherwise
Height-adjustable eyecup as well as a standard non-foldable and a winged rubber eyecup
three dustcaps

See a more detailed description of the eyepiece and its possibilities at the individual product page

2) 1x Hyperion Barlow Lens 2.25x (#2956180)

The Hyperion Barlow lens with two adapters

The Barlow lens with T-2 adapter (above) and Hyperion zoom adapter 1.25 "(Center).

Increases the focal length of your telescope by a factor of 2.25, with docking adapters for camera (T2-system) and zoom eyepiece.

Inclusive Accessories:

T2 Photo-Adapter
Zoom-Eyepiece Adapter

The Hyperion ClickStop Zoom Eyepiece with 1¼" and 2" Connector

There is an old saying that there is nothing like an eyepiece with fixed Focal length, if it should be the highest image quality. But this zoom eyepiece is second to none fixed focal length eyepieces, saving especially during mobile use so you don't have to carry many eyepieces around.

The Hyperion Universal Zoom is a perfect solution for all hunter, birdwatchers and astronomers alike, it brings a whole range with focal lengths from 8 to 24mm in a single high-quality eyepiece! It lets you continuously zoom with Clickstops at 8, 12, 16, 20 and 24mm. The only difference to the fixed focal length is that the field also varies from 53 Degrees at 24mm focal length up to 68 degrees at 8mm. This eyepiece was "Reverse" constructed unlike most other zoom eyepieces: largest field of view and the sharpest image at the highest magnification.

See a more detailed description of the eyepiece and its possibilities at the individual product page

Caution: On spotting scopes you can use the Hyperion zoom eyepiece only without the Barlow lens!

The Hyperion Barlow lens

The Barlow lens at the Hyperion zoom eyepiece in 1.25

Hyperion Barlow threaded on the discontinued Mark III Hyperion zoom eyepiece in 1.25"(left) and 2" configuration (on the right)

Hyperion zoom Barlow lens - 2.25x

The 2.25x Baader Hyperion Zoom Barlow lens was designed especially to complement the Hyperion Zoom eyepiece. It converts the regular focal lengths of 8 to 24 mm to a range of focal lengths between 3,6 and 10,7 mm, while retaining the outstanding image quality for observing sun, moon, planets and double stars with high resolution.

The Mark IV Zoom, in conjunction with or without the Hyperion Barlow, covers all focal lengths between 3.6 to 24 mm.

The Hyperion Barlow works with every Hyperion 8-24 mm Zoom eyepiece ever produced. The barlow is attached onto the 1¼"-nosepiece. Because of the dual nosepiece of the Mark IV, it can be used at telescopes with 1¼" or 2" eyepiece clamps.

The Hyperion Barlow comes with a T-2 thread-adapter, to mount the Barlow in front of any camera or other accessories with T-2-threads. Combine it e.g. with a DSLR-camera – in this way the camera body will be equipped with a 1 ¼" nosepiece. The camera body just needs a standard T-ring to fit it onto any 1 ¼” eyepiece holder.

Attach the lens unit without the Barlow-adapter (A) directly onto many 1¼" eyepieces, whenever they do not already have an integrated barlow element. The result is a 2x Barlow with very good optical properties (see left image).

Also included is an adapter on T2-thread. Thus, the Barlow can be used - for example, on a DSLR with T-Ring

Some highlights of the Hyperion Zoom Barlow Lens

Triplet lens design for highest optical quality
Anastigmatic Flatfield Design for high sharpness all over the field of view
Baader Phantom CoatingTM Group for highest contrast and light transmission

Connections Eyepiece side

Direct connection to any Hyperion Zoom with Barlow-adapter A
T-2 (M42x0.75 mm) thread with Barlow-adapter B
1¼" filter thread without additional Adapter

Attention: The Barlow lens is only suitable for use in astronomical telescopes; the use of spotting scopes is not possible.

Furhter information, image results...

Baader Blogpost:
The eyepiece series from Baader Planetarium

This entry was posted on October 17, 2022 by Alexander Kerste Last modified on September 27, 2023.

Baader Blogpost:
The camera at the eyepiece

This entry was posted on October 17, 2022 by Alexander Kerste Last modified on September 27, 2023.

Baader Blogpost:
Barlow lenses, their magnification factors and working distances

This entry was posted on October 17, 2022 by Alexander Kerste Last modified on September 27, 2023.

Related Articles

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 are only concerned with the scale of the image. On this occasion, the focus shift was also measured: A barlow moves the focus point and is often used to come into focus when there is not enough back focus. To do this, the actual barlow lens element is placed deeper in the focuser and the focus moves outwards. The reference shot: Fokal, without an additional barlow lens At first, a shot without an additional barlow...
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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 quickly become very unwieldy or at least require a very heavy mount, it is difficult - especially as an amateur - to reach for the largest possible telescope. A 14" Schmidt-Cassegrain with 3900 mm focal length, as it can be found on many observatories, is for most people the longest focal length telescope, which they can access at least through a club membership. So how do you get closer? The answer is simple: a magnifying...
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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 / 6,5 / 9 / 12,5 / 14 / 17,5 Image field 50-52° 72° 68° 48-68° 76° Nosepiece 1,25" 1,25"+ 2" 1,25"+ 2" various threads1,25" + 2" 25" + 2" Camera connection – yes yes yes yes Planets +++ + ++ ++ +++ Widefield + +++ ++ ++ +++ Bino compatible yes yes yes yes yes Classic Ortho/Plössl The most favourable - or better, most inexpensive - eyepiece series are the Classic Ortho/Plössl eyepieces, which are...
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Specifications

Additional Information

General
Manufacturer	Baader Planetarium
SKU (#)	2454827
EAN Code	4047825035905
Net weight (kg)	0.49
Eyepiece Series	Hyperion
Specifications
Focal Length	3,6 - 24 mm
Apparent Field of View	48° - 68°
AR-Coating	Phantom Coating® Group
Parfocal Eyepieces	Yes
Barrel Size (in)	1¼", 2"
Optical Design	Modular
Speciality	Eyepiece projection: classical
Eyepiece Design
Number of Lens Elements	7
Number of Groups	4
Slip Protect Safety	Safety Kerfs
Eyepiece Body above Reference Plane (mm)	81 mm
Length of 1¼" barrel (mm)	24,5 mm
Length of 2" barrel (mm)	27 mm
Outer Diameter	55 mm
Connections
Outer Connection (eyepiece/-camera-sided)	M43
Inner Connection (lens sided)	M36.4, 2"/SCT Thread (50.8mm)
Outer Connection (lens sided)	ø 1¼" (31.75 mm), ø 2" (50.8mm), M53
Camera Thread	M43
Threaded for filters	Yes
Included Items
Dustcaps	1¼" dustcap (31,8mm), 2" dustcap (45mm), 2" dustcap (46.5mm - fits over eyecup)
Eyecups	large height adjustable eyecup (M43), small eyecup (M43), winged eyecup (M43)

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