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View the Latest Filter Reviews

Item
Submitted By
ZWO 1.25
ZWO 1.25" 5 Filter Manual Filter Wheel # FW
5.0
Great quality
Works well!
Lumicon Single Polarizer Filter - 2
Lumicon Single Polarizer Filter - 2" # LF2110
5.0
beautiful useful filter
Lumicon 48 mm polarizer filter nicely packaged too . quick expedited shipping.
GSO 1.25
GSO 1.25" Color / Planetary Filter - #23A Light Red
5.0
Top Notch To My Eye & Standards
I recently ordered this #23A Lt. Red GSO to replace an oldie 23A as it developed streaks and spots. It was from an outfit called 'Pro-Optic' back around 2002. Getting this new one from GSO through Agena was the last of the Pro-Optics I had....
Brandon 1.25
Brandon 1.25" Color / Planetary Filter for Brandon Oculars - #23A Light Red
5.0
Brandon 23A filter
This filter worked great for viewing Mars. It is well made and finished, has clean threads, works smoothly all my Brandon eyepieces (new and old), is great optically and has been very useful with different telescopes.
GSO 1.25
GSO 1.25" Color / Planetary Filter - #8 Light Yellow
5.0
Exactly What Was Needed
My older ProOptics #8 Lt. Yellow Filter developed spots & streaks. It was cheap & probably dyed-in-vat. This filter by GSO is uniform edge-to-edge, no variation regardless of angle you view through it. This bespeaks it's high-quality. ...
GSO 1.25
GSO 1.25" Color / Planetary Filter - #23A Light Red
5.0
As advertised, solid filter
I bought this solely for the occasion of the Mars opposition for viewing with my C8, and it did indeed help increase definition to the point where I was able to discern differences surface coloration. For the price especially, a good purchase.
GSO 1.25
GSO 1.25" Color / Planetary Filter - #23A Light Red
5.0
OFIL-GS-1FIL-23A 1.25 inch #23 Light Red Filter
Very good quality filter at a reasonable price, complete with nice storage box.
Agena 2
Agena 2" Color / Planetary Filter - #80A Medium Blue
4.0
Does the job
Works well at toning things down so you can see the highlights.
Price is good for the quality of the product.
ZWO 1.25
ZWO 1.25" IR Cut Filter # IRCUT1
5.0
Essential
If you are converting your old web cameras or photo scanners into telescopic eyepieces you will need this. Commonly the color looks washed out and the images can't seem to focus, this is because of infrared is not filtered out in the original de...
Brandon 1.25
Brandon 1.25" Color / Planetary Filter for Brandon Oculars - #85 Salmon
5.0
Special Salmon (Amber) Colored Filter, Wratten 85
Very useful amber colored filter for Mars, planetary and lunar targets.

This filter fits only Brandon eyepieces, unless the special Agena adapter is ordered, which I did.
GSO 1.25
GSO 1.25" Color / Planetary Filter - #80A Medium Blue
5.0
great transaction, quick shipment, quality
great transaction, quick shipment, quality product
ZWO 5-Position Electronic Filter Wheel for 1.25
ZWO 5-Position Electronic Filter Wheel for 1.25" or 31mm Filters # EFWMINI
5.0
Works perfectly with Sharpcap and
Works perfectly with Sharpcap and my asi294mc pro! The only thing I will mention is make sure you place the paper spacers so extension tubes etc. do not bind.
Lumicon Color / Planetary Filter #82A Light Blue - 1.25
Lumicon Color / Planetary Filter #82A Light Blue - 1.25" # LF1075
5.0
Lumicon Planetary Filter 82A
This filter works great on my 6 inch Mak-Cass scope. Great views of Mars, Saturn and the moon.
Celestron Oxygen III Narrowband Telescope Filter - 1.25
Celestron Oxygen III Narrowband Telescope Filter - 1.25" # 93623
5.0
2” Celestron Oiii narrowband filter
Works excellent on my Explore Scientific 127mm. Tested early morning Aug 2018 on Orion Nebula in East horizon. Brings out nebulosity quite well.
JAS in Arizona
Meade Series 4000 #905 1.25
Meade Series 4000 #905 1.25" Variable Polarizing Filter # 07286
5.0
Meade variable filter
Well made nice wuality
ZWO 1.25
ZWO 1.25" 850nm IR Pass Filter # IR850NM1
5.0
great for the moon
so fare I have only used it for the moon and it worked great
Lumicon Color / Planetary Filter #82A Light Blue - 1.25
Lumicon Color / Planetary Filter #82A Light Blue - 1.25" # LF1075
5.0
Lumicon is quality.
Lumicon is quality.
Baader Contrast-Booster Filter - 1.25
Baader Contrast-Booster Filter - 1.25" # FCB-1 2458360
5.0
Great Filter Great Service
This filter really does enhance the contrast of planets and Nebula and is a must for all amature astronomers.
The service and pricing provided by Agena is outstanding, I would recommend them highly to anyone.