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SVBONY SV139 Telescope ND4 filter transmits only 25% of the incoming light; boosting contrast and ability to discern detail on the Moon; have perfectly neutral color will not alter the natural color of the Moon
Comfortable to use
Helps reducing overall brightness without altering color; allow you see more surface features and details; at the same time make you eyes more comfort
High quality Aluminum alloy frame
Aluminum alloy frame sealing ring for better tightness; Sturdy plastic case; dust-proof; protect the filter from pollution
High quality optical glass
Made with high quality optical glass;helps to reduce glare so that you can see more details and surface features of the Moon with your telescope
High contrast
Telescope eyepiece filter transmits only 25 percent of the incoming light; boosting contrast to discern detail on the Moon
Specifications:
- Type: Neutral Density Filter
- Material: Aluminum Frame, Metal Thread and Optical Glass
- Barrel diameter: 1.25''
- Optical density value: 0.6
- Transmission: 25%
- Thread: Standard M28.5*0.6mm
- Net Weight: 5.0g / 0.19oz
- Note: Eyepiece are NOT included
Glass Thickness: 2mm
Easy to match with 1.25-inch eyepieces
Metal filter cell threads directly into the 1.25-inch barrel of your telescope eyepiece
Package Includes:
1x SVBONY 1.25" ND4 Filter
1x Sturdy Plastic Case
Juan M.
Reviewed in Mexico on February 17, 2024
Buena calidad y buen material, cumple con las expectativas.
yefferson
Reviewed in the United States on May 6, 2023
Excellent
carlan chastain
Reviewed in the United States on May 12, 2023
The filter will not fit my lenses but I made it work. It does filter great but be mindful of your thread sizes of your lenses.
Bill
Reviewed in the United States on September 14, 2022
Like it.
chris_2092
Reviewed in the United States on January 30, 2022
This is a good filter, makes looking the moon much easier than without a filter. I give 4 stars out of 5 because this arrived with a crack. Replacement is fine.
Jeff
Reviewed in the United States on May 20, 2021
Good value, Works as expected.Note that these filters are not threaded on both sides, so you can't attach additional filters to this one. If you want that, get these (but they are 13% transmission, not 25%: https://www.amazon.com/Neewer%C2%AE-Neutral-Density-Transmission-Telescope-Eyepiece/dp/B01AL59PWM/ )
Ken Betz
Reviewed in the United States on July 4, 2020
Nice filter. Good price. Used this 25% transmission filter to view the moon during daylight hours. It helped remove the washed out look and enabled viewing of more detail.
Cole Train
Reviewed in the United States on November 9, 2020
Works great for lower luminosity moon!
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