Baader Planetarium 1.25" Venus and Ultraviolet U-Filter, 350nm CWL

SKU: AA2458292 MFR: FUV-1
Earn VIP Reward Points

Key Features

  • Explore Venus like never before with this 1.25" UV filter, revealing cloud details!
  • Enhance your planetary views! This narrowband filter blocks unwanted light pollution.
  • Capture stunning UV images; perfect telescope filter for astrophotography enthusiasts.
  • Experience superior optical quality with dielectrically coated Baader Planetarium filters.
  • Threaded for compatibility, this durable construction filter fits most standard eyepieces.
  • Maximize contrast with precise 350nm CWL, great for specialty UV-Pass filter usage.
See More Product Details
Special Order?Estimated to Ship: 08/26/2025
Free Shipping

See Options

1

Protect your gear with Adorama Protect.* Learn more

1 Year

$28.99

2 Year

$51.99

3 Year

$64.99

Available to U.S. customers only.

Need help? Ask our experts.

Overview
Compare
Specs
Protection
Q&A

Questions & Answers

Reviews about this item

Review Summary

Select a plan in the Add Protection section above and purchase with this product by clicking “Add to Cart”.

image-protection

TRUSTED PROTECTION PLANS, EXCEPTIONAL SERVICE.

Invest In Your Gear and Peace Of Mind!

Accidents happen. Protect your favorite Adorama products and purchase a protection plan to stay covered from accidental damage, mechanical or electrical failures, and more.

Repair or Replacement

Repair or Replacement

If we can’t fix it, we’ll replace it at no additional cost.

Accidental Damage

Accidental Damage

Protect your product from drops, spills, and more.

Peace of Mind

Peace of Mind

Enjoy your gear without fear. We have you covered!

Failure Protection

Failure Protection

When regular use of your product over time results in mechanical or electrical failure.

Zero Deductible

Zero Deductible

We will never charge you a deductible after the purchase of a plan.

Customer-Focused Support

Customer-Focused Support

Our claims process is simple & easy and our customer service team is happy to help.

Adorama Protect powered by Extend is available for purchase to customers in the United States. Not available for international or U.S. territories purchases. Plans on open box items do not cover pre-existing damage.
Adorama Protect plans are available for ABS clients. If you have any questions or require assistanse, please call 800-223-2500

Baader Planetarium U-Filter Specifications

  • Transmission Range

    UV

  • Filter Thickness

    2mm (Without Cell)

  • HBW (Half bandwidth)

    60nm

  • CWL (Central Wavelength)

    350nm

  • AR-Coating

    Dielectrically coated, plane optically polished

  • Filter Size

    1 1/4"

  • Filter Usage

    Specialty, UV-Pass

  • Filter Mounted

    Mounted (LPFC 6mm)

  • Type Of Filter

    Narrowband

  • Filter Shape

    Round

  • Weight

    2.11 oz (60g)

  • UPC Code

    4047825022240

About Baader Planetarium U-Filter

Explore the celestial wonders with the 1.25" Venus and Ultraviolet U-Filter, 350nm CWL, a high-quality, durable product from the reputable brand, Baader Planetarium. This innovative filter is specifically designed for ultraviolet and Venus observation, making it an effective and versatile choice for both astrophotographers and amateur astronomers.

With a transmission peak of approximately 80% at CWL 350nm and a bandwidth of 60nm (320-380nm), this filter is capable of completely blocking the spectral range from 200nm to 1120nm. This ensures that only the desired wavelengths of light penetrate your camera lens or optical instrument, providing clear, detailed images of your celestial subjects.

The filter features a dielectric multi-coated coating on optically polished Schott glass UG-11. This enables shooting in the deep UV spectral region, a wavelength range that was previously inaccessible for amateur astronomers. Additionally, the Solar Calcium K-Line is within the passband of this filter, further expanding your astrophotography possibilities.

To ensure successful use of this filter, it is best paired with a UV sensitive imaging camera such as the SKYRIS 274M and a telescope of at least 5" diameter. Please note that Single Shot CCDs are not suitable for use with the U-Filter.

Experience the universe in a new light with the 1.25" Venus and Ultraviolet U-Filter, 350nm CWL, and capture the beauty of the cosmos like never before.

Baader Planetarium U-Filter Features

  • Transmission peak approx. 80% at 350nm, bandwidth 60nm (320-380nm), completely blocking the entire spectral range from 200nm to 1120nm
  • Dielectric multi-coating on optically polished Schott Glass
  • Enables imaging in the deep UV spectral region. A "breakthrough" for imaging the planet Venus! Allows amateur astronomers to capture cloud structures of the Venusian atmosphere
  • Successful astro-application of this filter requires a suitable UV-sensitive lucky imaging camera module (i.e. SKYRIS 274M) with at least a telescope of 5" diameter (a telescope with an 8" diameter is recommended)
  • Non-astronomical applications possible: e.g. check for paint damage on cars or state of health of plants and much more

Warranty Information

This product has a limited warranty of 24 months for parts and 24 months for labor.

Key Features

  • Explore Venus like never before with this 1.25" UV filter, revealing cloud details!
  • Enhance your planetary views! This narrowband filter blocks unwanted light pollution.
  • Capture stunning UV images; perfect telescope filter for astrophotography enthusiasts.
  • Experience superior optical quality with dielectrically coated Baader Planetarium filters.
  • Threaded for compatibility, this durable construction filter fits most standard eyepieces.
  • Maximize contrast with precise 350nm CWL, great for specialty UV-Pass filter usage.

What's in the box:

  • Baader Planetarium 1.25" Venus and Ultraviolet U-Filter
  • Baader Planetarium 1 Year Limited Warranty