Baader Red Bandpass Eyepiece Filter (2") For Astronomy

Product Code: eq56669
Availability: In Stock

$237.00 $360.24

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Description
Reviews (11)

Centered on the 610nm wavelength, the Baader Red Bandpass Eyepiece Filter (2") for Astronomycan be used by itself or stacked with other filters to enhance your observations when viewing all of the planets and especially Jupiter, Saturn, and Mars. The optical glass filter is planeoptically polished and treated with seven-layer Phantom Group anti-reflection multi-coatings to improve contrast and clarity while eliminating reflections, scattering, or image dimming. Holding the filter is an black anodized aluminum frame made to fit standard 2" eyepieces and other accessories such as diagonals and Barlows.

Planetary Viewing/Imaging Filter 610nm Wavelength Bandpass 2" Eyepiece Threads 7-Layer Anti-Reflection Multi-Coated No Reflections, Scatter or Image Dimming Planeoptically Polished Optical Glass 98% Throughput Transmission Blackened Aluminum Frame Stackable with Other Filters

Parameters
Item Type	1x Red Filter
Filter Eyepiece Size	2"
Transmission Wavelength	610 nm
Coating	Multi-Coating
Filter Material	Glass
Ring Material	Aluminum
Weight	2.3 oz / 66 g
Packaging Info
Package Weight	0.1 lb
Box Dimensions (LxWxH)	3 x 3 x 1"

Steep absorption edge
Blue and green wavelengths are almost completely blocked, increasing contrast between the light and dark bands on Jupiter and Saturn
Most interesting filter to use for observing the polar caps of Mars
An ideal filter for daily observation of all the planets
98% average transmission bandpass throughput

Related Questions and Answers

Q: 1. Is this eyepiece waterproof?

A: The Alpine Astronomical Baader Hyperion 8-24mm Mark IV Zoom Eyepiece (1.25"/2") BH #ALHYPZOOM • MFR #HYP-ZOOM is not waterproof.

Q: 2. This zoom eyepiece is 3 times the price of Celestron's zoom. Is it worth that difference in cost?

A: It has much higher optical quality due to the -Phantom Coating Group Multi-Coatings and 7-Element/4-Group Flat-Field Lens Design

Q: 3. How can we adapt the 2" UV bandpass filter to a Sony E-mount 49mm lens?

A: I know of no adapter to mount a 2" (50.8mm) filter on to a 49mm opening. I do know some that use gaffing tape.

Q: 4. what does focal length of 21mm eyepiece become when the snout is removed?

A: The Alpine Astronomical Baader Hyperion 68° 21mm Astronomical Eyepiece (1.25"/2") would become 32.2mm with the snout removed.

Q: 5. Is this eyepiece barrel 1.25/2" or only 1.25" ?

A: The Alpine Astronomical Baader Hyperion 68° 10mm Astronomical Eyepiece (1.25"/2"), will work both with 1.25" and 2" holders." (We can see in the Overview it is explained-This eyepiece with a unique modular design that allows it to fit into standard 1.25" holders and accessories with the ability to remove the primary snout and have it fit into larger 2" holders as well.)

Q: 6. Is this a #8 Yellow?

A: No it is not. A Yellow #8 is typically used for an increase in contrast with black and white films. The Alpine Astronomical Baader Yellow Colored Bandpass Eyepiece Filter is centered on the 495nm wavelength suppresses the secondary blue spectrum when using achromatic and half-apochromatic refractor telescopes, increasing image sharpness.

Q: 7. how can I adapt the Baader U-Filter 2" to a Nikkor AF-S 50mm 1:1.8G Lens?

A: 2" is the outside diameter of the filter, not the thread. It's an M48 thread as stated on the manufacturer website, baader-planetarium. Use a normal step-up ring.

Q: 8. Is it parfocal with other Alpine Hyperion eye pieces?

A: This is the only additional information B&H has on the Alpine Astronomical Baader 72° Hyperion 36mm Aspheric Eyepiece (1.25"/2") https://alpineastro.com/products/baader-36mm-hyperion-aspheric-2-eyepiece And yes to the compatibility with other eyepieces

Q: 9. Can I use the T-mount adapter shown in "Recimmended Accessories" to shoot through this eyepiece with my D-SLR? I already have one, and a Nikon F-mount adapter. Can I just screw it to the threads on the viewing end of the eyepiece, then attach my D-SLR via my Nikon adapter, or do I need to get a special connector?

A: You need this adapter to attach a T mount adapter, Alpine Astronomical Baader Hyperion M43/T-2 T-Adapter BH #ALHTA43T2 • MFR #HTA43/T2 https://bhpho.to/30q8Ltq

Q: 10. What is the shade of red light? (Wavelength greater than 650nm is better and should be mentioned.)

A: The Explore Scientific Astro R-Lite Red Astronomy LED Flashlight is not in infrared flashlight which is why there are no specifications for the nanometer range. It is made to luminate without affecting night-adjusted vision so you can read star charts, find eyepieces and filters, and safely navigate around your telescope.

Jeremy	24/09/2024
[Aluminum] Metal housing is quality. Takes 1 AA battery. Does the job 5

Nadine	14/09/2024
[610 nm] Excellent service, excellent delivery time! That alone sold me! The product, my eyepiece the Baader Hyperion is Awesome!! Thanks B&H you Rock!! 5

Alan	12/08/2024
[Multi-Coating] Wanted something small, well made and not very bright, this fits all the criteria plus it has a very usable neck strap. Very happy with this purchase. I would definitely buy it again if needed. 5

Scott	02/08/2024
[3 x 3 x 1"] very dim RED light for saving night vision. This also has a push pull lens to defocus the RED beam and make it even dimmer. 5

Andres	02/07/2024
[1x Red Filter] Its almost magic. Se what your eyes can't see. Thats what this filter does in a full conversion camera, a tripod and a photographer capable of working with tools that are not for everyone. But if you pay what it costs and wait for it to be back ordered you are more than likely a committed photographer already. The filter can be used in a lot of scientific uses but I got it once I converted a full frame DSLR with still a lot of life ahead to full spectrum and got a very large set of filters to get the most of it shooting infrared and UV photography. So far it's been a great way to open new possibilities on creative photographic exploration. 5

Dan	01/07/2024
[2"] just runs on one battery, but still a nice bright red and also a lower light setting as well. I like how I can hang it from my neck. 5

Boris	26/05/2024
[0.1 lb] This eyepiece is absolutely perfect. It has plenty of eye relief, and a good field of view. Optically your view is real clear and crisp. I was so impressed by the performance of this eyepiece that I bought more of them in different magnifications so I could cover all aspects of enjoying the night sky. A great price range for this level of performance. In short, these are a must have! 5

Jimmie	21/05/2024
[3 x 3 x 1"] 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

Ralph	03/05/2024
[1x Red Filter] 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