Baader 4Nm O-Iii Cmos Filter For Astronomical Imaging

Baader 4nm O-iii Cmos Filter For Astronomical Imaging

Product Code: eq91845
Availability: In Stock

$891.00 $1,416.69

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Description
Reviews (15)

This 1.25" eyepiece Baader 4nm O-III CMOS Filter for Astronomical Imagingfrom Baader 4nm O-III CMOS Filter for Astronomical Imagingis 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
Size	47.4mm Round, Unmounted for FCCT 2" Slider

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. In the in the box section it list counter weight as 2 CGM and not one for CGX. is this correct?

A: Yes, the RASA 8 and CGX mount comes with two (2) 11-pounds counterweights as seen in this official Celestron webpage product specification: https://www.celestron.com/products/cgx-800-rowe-ackermann-schmidt-astrograph-rasa-telescope#specifications

Q: 2. 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: 3. With the Barlow attached, this effectively goes between 3.5mm - 10mm, right?

A: With a 2X barlow correct

Q: 4. What size would you recommend for a Zeiss 20x60 IS binoculars? Are these the safest filters to use? Thanks.

A: The Alpine Astronomical 60mm Baader AstroSolar White-Light Solar Filter for Binoculars (Single) BH #ALASBF60 • MFR #ASBF-60 would be the appropriate sixe for the Zeiss 20x60 IS binoculars.

Q: 5. Can you please list out the items come with this package $657.00 : 2.6X glasspath compensator and 2 inch nosepiece?

A: 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 BH #ALGLASS3 • MFR #GLASS-3 https://www.bhphotovideo.com/c/product/1405373-REG/alpine_astronomical_glass_3_glasspath_corrector_1_2_6_for.html Alpine Astronomical Baader 2" T-2 Nosepiece BH #ALT216 • MFR #T2-16 https://www.bhphotovideo.com/c/product/1406318-REG/alpine_astronomical_t2_16_baader_2_nosepiece.html

Q: 6. What items are in the box?

A: The Alpine Astronomical Baader 2x Carl Zeiss Abbe Barlow Lens (1.25") BH #ALZBARLOW • MFR #ZBARLOW comes with the Alpine Astronomical Baader 1.25"/T-2 Click-Lock Eyepiece Holder Adapter BH #ALT208 • MFR #T2-08 and a 2 year aarranty.

Q: 7. What storage container would you recommend for a pair of these filters? Thanks

A: It would be best to use the box the filter comes in or use this Print File box: https://bhpho.to/3uHvHCQ

Q: 8. How do you power over cat 5?

A: You connect power sources to your network such as these: https://bhpho.to/2rP4iy7

Q: 9. Does the IP-10 controller work with the BRC-X1000?

A: Yes it does. You will be able to use the Sony RM-IP10 Remote Controller with this camera.https://bhpho.to/2ptuHmv

Q: 10. 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.

Carlo	05/09/2024
They work quite well; no halos or any undesirable behavior which I could notice as of now. They did require an increase in exposure time, but that's expected. 5

Robert	28/08/2024
It works just fine. 5

Mike	22/08/2024
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

Adam	06/08/2024
Very nice. Could use one more thread though. Seems a little short on threading when trying to attach and remove while making lens changes in the dark. Makes me a little nervous sometimes that I will drop it during removal from the lens. Good quality though and I like having it around. 5

Javier	01/08/2024
Excellent filter 5

Terry	27/07/2024
Baader makes some great lenses and filters, I have yet to be disappointed and this one is no different. 5

William	26/07/2024
One of the best items I've purchased for my 140mm telescope. The reduction in sky glow and the contrast improvement add to those Oh, Wow! moments of star gazing. 5

Richard	17/07/2024
This dovetail clamp is well made and has a quality finish. I am building my own custom telescope mount and this clamp should be a secure fixture for my application. The clamp accommodates Vixen-style dovetail bars and should support small to medium size telescopes without a problem. However, I would NOT put a large, heavy telescope on this clamp. 5

John	01/07/2024
did actual Ronchi star test with Celestron C5C works as advertised 5

John	28/06/2024
I live in heavily light polluted skies, yet I can go out in the backyard and look up at the billowing clouds of the milky way. I can actually see meteorite showers when they are happening. This is all possible by using this filter in conjunction with a Gen3 night vision device. This filter blocks out all light below 685nm which is basically all the man made light pollution leaving mostly celestial light for your enjoyment. This does cut out hydrogen alpha light, so you will not be seeing nebulae with this, but a separate band pass filter is used for that purpose. 5