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Baader 4nm S-ii Cmos Filter For Alpine Astronomical (1.25")

Baader 4nm S-ii Cmos Filter For Alpine Astronomical (1.25")
  • Product Code: eq92295
  • Availability: In Stock

$867.00 $1,083.75

This 1.25" eyepiece Baader 4nm S-II CMOS Filter for Alpine Astronomical (1.25")from Baader 4nm S-II CMOS Filter for Alpine Astronomical (1.25")is recommended for extremely fast optical systems from f/3.4 to 1.8, and is designed for the special filter requirements of fast optics like Celestron RASA astrographs. The filter features a Reflex-Blocker hard coating, which has been planoptically polished, and has Life-Coat sealed edges. It is equally suitable for modern CMOS sensors as well as for older CCD camera technologies.

Optimized for CMOS, Suitable for CCD    Reflex-Blocker Hard Coated    Life-Coat Sealed Coating Edges

Parameters
Size1.25" Eyepiece

  • 4nm FWHM, recommended for extremely fast optical systems from f/3.4 to 1.8
  • Specially designed for the special filter requirements when used with fast optics like the Celestron RASA astrographs
  • Reflex-Blocker hard coated and planoptically polished with sealed coating edges (Life-Coat)
  • Blackened edges all around, with filter-lead-side indicator in the form of a black frontside outer rim
  • Optimized for modern CMOS cameras, but excellent for CCD camera technologies

Related Questions and Answers

Q: 1. With the Barlow attached, this effectively goes between 3.5mm - 10mm, right?

A: With a 2X barlow correct

Q: 2. How well would this work with Rokinon cine lenses (EF) on a BMPCC 6k?

A: The Sirui 1.25x Anamorphic Adapter can work with lenses up to 85mm Front Diameter Lenses. Depending on the Rokinon lens you are working with it should have a 77 or 72mm front thread that you can connect to. Using the included step rings should allow you to attach the Sirui 1.25x Anamorphic Adapter to your lens. The adapter includes the following step rings. 92mm Step-Up Ring 67mm Step-Down Ring 72mm Step-Down Ring* 77mm Step-Down Ring*

Q: 3. Why are there two Herschel wedges, photo and visual?? why can't one wedge be used for both with some adjustments?

A: The Alpine Astronomical Baader Cool-Ceramic Safety Herschel Solar Photographic Prism Mark II includes all the items in the visual version with the addition of 1.8, 0.9, and 0.6 neutral density filters. Aside for the extra filters, the other components are exactly the same.

Q: 4. It looks like the ASFT 100 and the ASSF 80 will both fit my telescope. The Baader film is the same in both filters. What am I getting in the ASFT 100 that warrants spending the extra $10?

A: A larger metal ring. A larger film area.

Q: 5. in continuation with previous question. So do i need to purchase Alpine Astronomical Baader T-2 90 Prism Star Diagonal Housing separately ?

A: It should come with everything you may need: In the Box Alpine Astronomical Baader MaxBright II Binoviewer (1.25") Carrying Case Zeiss Micro-Bayonet Mounting Adapter Limited 2-Year Warranty Alpine Astronomical Glasspath Corrector 2.6x for Maxbright/Mark V Binoviewers Limited 2-Year Warranty Alpine Astronomical Baader 2" T-2 Nosepiece Limited 2-Year Warranty I dose not come with eyepieces.

Q: 6. Will this adapter work with Rokinon Cine DSX 35mm and 50mm lenses?

A: The Sirui 1.25x Anamorphic Adapter, with the 77mm adapter, can be use with the Rokinon DSX High-Speed Cine 35mm and 50mm lenses.

Q: 7. Does this come apart into two pieces like the Orion so you can put one half on the eyepiece and the other on the diagonal?

A: No, it dose not come apart.

Q: 8. How well would this adapter work on gfx sensor cameras? Any strong vignette or something?

A: The Sirui 1.25x Anamorphic Adapter will work on GFX sensors.

Q: 9. can this filter be used to view the flame and horse head nebula too and does it help viewing galaxies..??

A: So we really do not recommend using this filter for this purpose. It is more for Imaging, and it will reduce what you are seeing. I honestly don't recommend using a filter at all with looking at what you are going to view. However if you did want to get a filter then I would go with the Celestron UHC (Ultra High Contrast) LPR Filter (1.25 ) - Reduces Transmission of Wavelengths of Artificially-Produced Light. Website link: http://bhpho.to/1Luj0jC

Q: 10. Will this be a good filter to view the Lagoon Nebula?

A: Ask this question at cloudynights website it's a com address

26/09/2024

[1.25" Eyepiece] I have owned multiple 9mm eyepieces over many years and this is one of the best. Within that past few years I found that could not see as clear as I used to, needed to ware my glasses and started to focus on better eyepieces. I started with Explorer Scientific and Televue. I purchased the ES92 series and it became clear that in addition to great optics, eye relief of at least 18mm, was a critical factor in my ability to see objects with comfort and ease.

I did multiple comparison sessions between the Morpheus, my
Televue 8 /100, my Meade 8.8 /82 and a 9 /68. No matter how much I appreciated the Ethos wide field I could not see the entire field with my glasses on, in fact its became uncomfortable and difficult for to achieve exit pupil as well as eye placement. For eye relief and
comfort the Morpheus was the clear winner. The Morpheus barlowed well and is also significantly lighter than my ES92 and lighter than my ethos.

Optically the Morpheus was excellent and sharp to the edge even in my fast f4.95 Dob. The televue was slightly sharper, darker. The ES92 provided similar views but it's hard to tell due to magnification difference and the 92 degree field of view. The Morpheus
provided excellent views of M36, 37, 38, Jupiter, Saturn and Mars as well as M43 which showed clear divisions between dark and light nebula without a filter.

Considering the eye relief, comfort, field of view, weight and the optical performance the Morpheus will be replacing my Ethos. I would absolutely recommend this eyepiece.

5
29/08/2024

[1.25" Eyepiece] Alpine does a great job and for the price. Good eye relief for a 9mm eyepiece.

5
28/08/2024

[1.25" Eyepiece] The 24mm hyperion works very well with my f6.5 achromatic telescope. Its 68 degree FOV translates to 2.4 degree true field of view on that scope, a definite step up from the eyepieces that came with the scope from Celestron. Very little chromatic aberation noticed even looking at the bright moon. The slight green halo at the top edge of the full moon was only noticed when I remembered to look for it - not a problem for me as a visual observer. Jupiter gave good views, only a little soft at the very edge of the field. The only problem I experienced is that it's on the heavy side. I can't achieve balance on my mount the way it's set up.

5
14/08/2024

[1.25" Eyepiece] I have a Celestron Astro Fi 130 telescope. It came with 10mm and 25mm lenses. The 10mm field of view is so narrow that finding objects was often very difficult, even when I used the lower magnification 25mm lens to center the object.
This Alpin Astronomical Baader lens has a wider field of view than the 25 mm lens my telescope came with. When I realized that, I stopped using the 25mm lens to align my mount.

The rubberized grip is nice. This is a large lens. It weighs significantly more than the factory lenses.

I have also used this lens with a 2x barlow lens. I was able to see rings on Saturn and even some hints of banding on Jupiter. Not bad for a 130mm aperture. The wide field of view meant I could point to those planets without aligning my telescope (because they were setting and I didn't have enough visible stars or time to align) and family members had enough time to take turns viewing the planets without having the objects drift out of view.

This was one of the most expensive accessories I purchased for my telescope, but it has enhanced my enjoyment significantly.

5
28/07/2024

[1.25" Eyepiece] This eyepiece provides an unsurpassed combination of wide field and long eye relief. So if you're looking for both in a single ocular, look no further. It's wonderfully comfortable, and just...gets out of the way.

5
27/07/2024

[1.25" Eyepiece] Baader makes some great lenses and filters, I have yet to be disappointed and this one is no different.

5
16/07/2024

[1.25" Eyepiece] Bought this with the 14mm and 28mm fine tuning rings (ftr) that are sold separately. The 1.25 nosepiece has a Barlow lens because if you take off the 1.25 and put it in a 2 diagonal it is 22.9mm still with the 68 afov.
With the 14 & 28mm ftr together it is 8.1mm focal length. So with one eyepiece I can get 13mm,10.8mm, 9.2mm, 8.1mm and basically 23mm focal lengths all in one eyepiece. I mainly use the 13mm and 23mm and save the 8mm for closeup views of small globular clusters and other DSOs.
It has an excellent flat field view to the edges and especially considering the price it is as good or near as good as EPs that cost three times as much. Baader hit it out of the ballpark with this one.

5
14/07/2024

[1.25" Eyepiece] Finally got to use this for the first time last weekend on Jupiter. Provided nice, sharp images to combine with my Baader RGB filters

5
13/07/2024

[1.25" Eyepiece] Es una ocular de excelente calidad de construccin con materiales de primera y un gran eye relief. Las imgenes observadas son de gran calidad y tiene los aditamentos necesarios para astrofotografa y para cambiar los aumentos.
Una excelente compra

5
04/07/2024

[1.25" Eyepiece] Baader Orthoscopic EPs are built on the old Zeiss Abbe construction with superior smooth polishing of the lens with anti-reflective coatings that when splitting Mizar down to its smallest star there was no spikiness, just a perfectly round star. It is very sharp and bright. The little eye guard is handy because it is a very short eye relief and blocks light from the side. Great for lunar with the proper filter, same for planets and it Barlows very well for Mercury when visible.

5

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