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View the Latest Filter Reviews

Item
Submitted By
Celestron 1.25
Celestron 1.25" Moon Filter # 94119-A
1.0
Not what I expected
The moon filter I got was a black plastic material (rather than metal or aluminum) with grooves that didn't thread into my eyepiece.
Coronado 1.25
Coronado 1.25" Secondary Blocking Filter for SolarMax - 10mm # BF10
4.0
Extremely expensive
I does the job. This is a basic 1.25" mirror diagonal (that would cost $50) with an ITF (the maier photonics equivalent would cost $75 and the BelOptik equivalent about $200) and the blocking filter itself. This mens that we are paying about $35...
Baader Premium Eyepiece Filter: Yellow, 495nm Longpass - 1.25
Baader Premium Eyepiece Filter: Yellow, 495nm Longpass - 1.25" # FCFY-1 2458301
1.0
Sucks
Did absolutely nothing for my achromatic refractor. I had to pay for shipping it back and return S&H charge.
Optolong Clear Focusing Imaging Filter - 1.25
Optolong Clear Focusing Imaging Filter - 1.25"
5.0
Excellent service
Excellent service
GSO 1.25
GSO 1.25" Color / Planetary Filter - #29 Dark Red
5.0
GSO #29 deep red
This filter when combined with an IR/UV filter can be the first step toeard trying Ha imaging. The band width will be very wide but the combo is an inexpensive way try this segment of nebula imaging. I have numerous GSO products and have been satisfi...
BST 2
BST 2" Variable Transmission Polarizing Filter
5.0
BST 2” Pokarizing Filter
I like that this filter can be disassembled into two segments and installed in front of my diagonal and the bottom of my eyepiece. Rotation of the eyepiece gives you the ability to optimize the polarizing effect on a bright target such as the full mo...
Celestron Oxygen III Narrowband Telescope Filter - 1.25
Celestron Oxygen III Narrowband Telescope Filter - 1.25" # 93623
5.0
Great Views
I purchased this filter to get better views of Nebula. The filter definitely highlights the contrast of the nebula against the darker background. The threaded filter fits all my 2" eye pieces and is a nice addition to my observing tools.
Baader Semi-APO Filter - 1.25
Baader Semi-APO Filter - 1.25" # FSAPO-1 2458398
5.0
Excellent product - It works as advertised
Read the "Semi APO" claims and bought one expecting to quickly return it for non-performance. Tried it in my Bresser AR 127L / 1200 attached to the 2" diagonal, focused on the moon, very bright stars and in daytime on a Birch tree down...
Optolong Ultra High Contrast UHC Nebula Filter - 1.25
Optolong Ultra High Contrast UHC Nebula Filter - 1.25"
5.0
Excellent Product
Excellent Product
Optolong LRGB Imaging Filter Set - 1.25
Optolong LRGB Imaging Filter Set - 1.25"
5.0
Optolong 2” LRGB filter set
I’m using these filters with my Altair 183m monochrome camera. The filters are installed on a 6 position Orion 2” filter slide. This combination provides excellent images for post processing with small adjustments required in focus between images...
Baader Premium Eyepiece Filter: Yellow, 495nm Longpass - 1.25
Baader Premium Eyepiece Filter: Yellow, 495nm Longpass - 1.25" # FCFY-1 2458301
5.0
Solid Chromatic Aberration Removal
Following the advise of experienced owners of fast acromats, there was a higher preference towards the 495LP over the Fringe Killer to remove CA. I have done basic tests and found the CA to be under control in my G'n'G SW120ST. Star fields ...
DayStar Original Quark Eyepiece Solar Filter for Refractors: H-Alpha Prominence Model # DSZ4P
DayStar Original Quark Eyepiece Solar Filter for Refractors: H-Alpha Prominence Model...
4.0
Great but
Negative point: As the product is shielded and I do not have technical assistance in my country, I would like electrical connection to be stronger. It seems a fragile.
ZWO 1.25
ZWO 1.25" IR Cut Filter # IRCUT1
5.0
ZWO IR Cut
Works to keep the star bloat down.
Baader Double Stacked Solar Continuum Filter - 1.25
Baader Double Stacked Solar Continuum Filter - 1.25" # FSOL-1D 2458392
5.0
Solar Continuum Double Stack
Esse filtro faz o que promete! Já tive um simples antes, mas esse duplo melhora ainda mais o contraste na superfície do Sol, deixando os granulos solares e as células de convecção muito mais fáceis de serem fotografadas. Meu uso é basicamente ...
Optolong City Light Supression / Light Pollution Reduction CLS-CCD Filter - 1.25
Optolong City Light Supression / Light Pollution Reduction CLS-CCD Filter - 1.25"
5.0
CLS-CCD filter
I live in a heavily light-polluted city and this filter has become my go-to imaging filter. A great filter for anyone who deals with city viewing.
Celestron 1.25
Celestron 1.25" Moon Filter # 94119-A
5.0
Celestron moon filter
I found this to be inexpensive and very useful in looking at a bright moon phase.
ZWO 5-Position Electronic Filter Wheel for 1.25
ZWO 5-Position Electronic Filter Wheel for 1.25" or 31mm Filters # EFWMINI
5.0
ZWO 5 position electronic filter wheel for 1.25" filters
The EFW from ZWO is an excellent addition to an astro imaging setup for your monochrome camera. It works seemlessly with my ZWO ASI camera and capture software. AgenaAstro provides great service and fast shipping.
Lumicon Ultra High Contrast UHC Filter - 1.25
Lumicon Ultra High Contrast UHC Filter - 1.25" # LF3025
5.0
Lumicon UHC 1.25" filter
Excellent optical quality
Lumicon Ultra High Contrast UHC Filter - 1.25
Lumicon Ultra High Contrast UHC Filter - 1.25" # LF3025
5.0
The one to buy
If you're going to get one filter I recommend this one. Excellent optical quality with no ghost images. Great views of many nebula from under Los Angeles light pollution.