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I would like to use the vip modular barlow in 3x mode on a 120/1200:
At 3x will the 26mm 70° and 35mm 70° eyepieces have problems?
Will the 3x image be degraded a lot?
Will an additional 64mm spacer be needed to reach 3x?
Thank you
At 3x will the 26mm 70° and 35mm 70° eyepieces have problems?
Will the 3x image be degraded a lot?
Will an additional 64mm spacer be needed to reach 3x?
Thank you
Question by: Giovanni on Dec 11, 2022 8:37:00 AM | 1 Answer(s)
Hello: I just buy a baader vip Barlow. I have used it with 1,25” connection (in scope and camera). Results are perfect. Congrats for the product
I would like to use now in a 2” scope and in a reflex camera and I don’t know how to do it.
Is there any schematic to see the way to do it.
On the other hand, I would like to know the explanation about modules of the Barlow. On instructions included in the box, I don’t have in a clear way utilities of each module.
Thank you in advance for your help
I would like to use now in a 2” scope and in a reflex camera and I don’t know how to do it.
Is there any schematic to see the way to do it.
On the other hand, I would like to know the explanation about modules of the Barlow. On instructions included in the box, I don’t have in a clear way utilities of each module.
Thank you in advance for your help
Question by: Alfonso Merino on Jul 14, 2020 10:17:00 AM | 1 Answer(s)
I have a William optics gtf81 f6/6 focal length of 535mm refractor with a 2 inch diagonal. Using hyperion eye pieces i can not focus, using my just purchased vip Barlow I run out of in focus can you give me any advice thank you!
Question by: Steve on Sep 19, 2023 12:53:00 PM | 1 Answer(s)
I have this VIP Barlow, along with all the Morpheus eyepieces. I would like to configure this Barlow so that I get 1.2x magnification, or as close to that as possible. As it comes out of the box, the lowest magnification with the Morpheus is 1.53x.
Baader has a lot of parts in their catalog, too many for a novice like me to sort through - is there anything I can acquire to convert or make the VIP element a 1.2x Barlow?
Thank you!
Baader has a lot of parts in their catalog, too many for a novice like me to sort through - is there anything I can acquire to convert or make the VIP element a 1.2x Barlow?
Thank you!
Question by: Arthur on Nov 23, 2022 10:04:00 PM | 1 Answer(s)
Mine is not really a question, but I would like to offer my feedback regarding the configuration I use all the time for visual work:
(1) 2-to-1.25 reducer
(2) 15mm spacer ring
(3) 2" nosepiece (# 2408150)
(4) Baader VIP element housing cell
(5) Baader M43a x 0.75 / T-2a Adapter (# 2458199).
In particular, (4) is mounted on (5), and (5) is screwed at the bottom of (3) via T2 connection.
Advantages of this configuration for visual use are:
(1) the change in focus position when the VIP is used or removed is minor. Also, adding spacers does not change the focus position much
(2) it is more solid, as the connection with the focuser is via 2"
(3) the barlow can be used with refractor diagonals in 2" without hitting the mirror or prism.
Thanks for making such a wonderful tool.
(1) 2-to-1.25 reducer
(2) 15mm spacer ring
(3) 2" nosepiece (# 2408150)
(4) Baader VIP element housing cell
(5) Baader M43a x 0.75 / T-2a Adapter (# 2458199).
In particular, (4) is mounted on (5), and (5) is screwed at the bottom of (3) via T2 connection.
Advantages of this configuration for visual use are:
(1) the change in focus position when the VIP is used or removed is minor. Also, adding spacers does not change the focus position much
(2) it is more solid, as the connection with the focuser is via 2"
(3) the barlow can be used with refractor diagonals in 2" without hitting the mirror or prism.
Thanks for making such a wonderful tool.
Question by: Piero Dalle Pezze on Jun 10, 2022 10:24:00 AM | 1 Answer(s)
Hi: I purchased an Explore Scientific 82° 30 mm Eyepiece and am looking for a good Barlow. After doing a lot of research I discovered the VIP. I love how versatile it is! However, this eyepiece is a 2” behemoth (weighs a kilo), so I was wondering if the VIP is a good choice for this application? Thanks!
Question by: Fred Danowski on May 24, 2021 2:33:00 PM | 1 Answer(s)
- Description
-
Details
Modular Barlow with 1¼" and 2" barrel
High quality optics with apochromatic characteristics, for magnifications of 2x and above
- Optical design by Dr. Pudenz, who has also designed the Zeiss Abbe eyepieces
- Modified by Roland Christen for US-American glasses
- modular construction for visual and photographc (VIP) use
- Fits into 1¼" and 2" focusers
- Designed for 35mm-film (ideal for full-frame-DSLRs with 24x36mm-sensors)
- Higher magnifications can be achieved easily by adding additional T-2 extension tubes
- Focal length of barlow element: -65,5mm
The housing contains the following parts from the T-2™-System: #15/#29/#25a/#25a/#14
Attention: This is a 2x barlow lens. It has nothing to do the 2.6x glass-path-corrector lens that we offer exclusively for binocular viewers
The Baader Barlow lenses at a glance
With currently five different barlow lenses in Baader Planetarium's product range, it is not easy to keep track of which model fulfils which function best.
Fluorite Flatfield Converter (FFC) / 3x-8x
(#2458200 , € 730,-)
90mm field of view also for medium format cameras - uncompromising quality even for extreme enlargements.
Focus gain: depending on configuration about 1.5-2.6cm
Carl Zeiss 1¼" Abbe Barlow lens 2x
(#1603321 , € 477,-)
Legendary Zeiss quality for the common magnification range between 2x and 3x (with additional T-2 extensions). With T-2 connection for cameras or eyepiece clamps. The qualitatively equivalent solution to the Fluorite FFC when smaller field size and smaller post-magnification are desired.
Focus gain: About 3 cm
VIP 2x modular barlow lens, visual and photographic
(#2406101 , € 228,-)
Versatile barlow lens for magnifications from 2x, for use with cameras (via T-2 thread) and eyepieces. Calculated for 35mm image diagonal (full format). With additional T-2 extensions it can also be used for slightly higher magnification factors.
Focus gain at 2x: Approx. 3.3 cm
Baader Q-Barlow 1.3x/ 2.25x
(#2956185 , € 55,-)
Inexpensive and amazingly high quality Barlow lens for the lower magnification range: In addition to being used as a normal Barlow lens with eyepiece clamp (with factor 2.25x), the Barlow element can also be used as a negative lens group when screwed directly into (almost) all eyepiece sleeves or directly in front of a camera with 1.25" filter thread and then provides a lower magnification of approximately 1.3x. Ideal for adapting a modern planetary camera to the resolution of an already long focal length telescope. Prerequisite: There must be no other elements in the nose piece that would prevent the approximeately 13 mm long Q-Barlow lens group from being screwed in.
Focus gain at 2.25x: About 0.4 cm
Hyperion Zoom 2.25x Barlow lens
(#2956180 , € 133,-)
Specially designed for the Hyperion Zoom eyepiece, also fits the filter thread of other eyepieces. With the included T-2 adapter, it can also be used directly on cameras; provides about 2.7x at 55mm working distance and about 2.3x at 25mm.
Focus gain: About 1.1 cm
More information, images results...
... can be found on our detailed Blogpost:
Baader Blogpost:
Barlow lenses, their magnification factors and working distancesThis entry was posted on October 17, 2022 Last modified on September 27, 2023.
Baader Blogpost:
The camera at the eyepieceThis entry was posted on October 17, 2022 Last modified on September 27, 2023.
Baader Blogpost:
The eyepiece series from Baader PlanetariumThis entry was posted on October 17, 2022 Last modified on September 27, 2023.
Related Articles
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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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Eyepiece Projection - How good can it get?
Question: With eyepiece projection, the image at the edge is extremely blurred. What could be the reason for this? 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...
Additional Information
| EAN Code | 4047825012890 |
|---|---|
| Manufacturer | Baader Planetarium |
| SKU (#) | 2406101 |
| Net weight (kg) | 0.22 |
| Inner Connection (lens sided) | M28, M42 x 0.75 (T-2) |
| Outer Connection (lens sided) | ø 1¼" (31.75 mm) |
| Inner Connection (eyepiece/-camera-sided) | ø 1¼" (31.75 mm) |
| Outer Connection (eyepiece/-camera-sided) | M42 x 0.75 (T-2) |
| Clamping System | Screw clamps |
| AR-Coating | Multi-Coated (MC) |
| Focal length reduction | -65,5mm |
| Inner Diameter / Clear Aperture (mm) | 28 mm |
| Barrel Size (in) | 1¼", 2" |
| Optical Design | Barlow |
| Speciality | Barlow lens |
FAQ
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Please click on title to open or open/close all FAQs
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Eyepiece Projection - How good can it get?
Question: With eyepiece projection, the image at the edge is extremely blurred. What could be the reason for this?
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.
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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.
