Top Rated Gear

Baader Planetarium U-Filter 2" (Venus, Ultraviolet, ZWL 350nm)

SKU: AA2458291 MFR: FUV-2
Earn VIP Reward Points

Key Features

  • Enhance Venus observations with this 2" Baader Planetarium U-Filter, perfect for UV detail!
  • Capture stunning ultraviolet (UV) images using this specialized telescope filter for astrophotography.
  • Reduce glare and boost contrast; this Baader Planetarium filter excels in light pollution conditions.
  • Crafted with durable materials, this 2" filter ensures years of reliable use in your telescope.
  • Experience superior color correction with this Baader U-Filter, revealing hidden planetary details.
  • Optimize light transmission at ZWL 350nm, unveiling unique features on Venus with this filter.
See More Product Details
Special Order?Estimated to Ship: 09/10/2025
Free Shipping

See Options

1

Protect your gear with Adorama Protect.* Learn more

1 Year

$39.99

2 Year

$59.99

3 Year

$79.99

Available to U.S. customers only.

Need help? Ask our experts.

Overview
Compare
Specs
Protection
Q&A

Questions & Answers

DANIEL G : I want to use this filter on an SLR lens with 58 mm filter thread on SLR lens. Which adapter(s) do I need? I need a specific product number(s), not the generic "female M48x0.75 to male 58 mm" answer.ANDREW R : Step down rings are available from several different manufacturers, part numbers will vary. I would recommend against using a 48mm filter on a 58mm lens however we do offer a step down ring that should work: <a href="http://www.adorama.com/prosd5848.html" target="_blank">http://www.adorama.com/prosd5848.html</a>
Shopper : Why Did You Choose This?KEVIN K : solar, garden, venus photographyGREGORY H : This filter is the standard. Minimal visible or infrared leak.

Reviews about this item

Review Summary

2016-12-12T20:17:56

Rated 5 out of 5

Works as suggested, non-standard filter thread.

This specialty filter for UV reflectance (not fluorescence!) photography with full spectrum modified digital camera works as advertised in eliminating visual spectrum and only letting through UV light. It works well with a 365 nm LED flashlight. It is important to note, that the filter thread of this filter has a NON-STANDARD pitch, and will not thread properly with standard photographic filter thread and step-down rings. The pitch is 0.75 and not 0.5 as on photographic filters. The filter diameter is 48 mm, so less than the 2" (= 50 mm) that is indicated in the filter's name. To properly seat this filter on photographic equipment, a specialty adapter is required. Cannot provide specific source, but search the "usual places".

Daniel G.

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 FUV-2 Specifications

  • Filter Size

    2" / 5.08cm

  • UPC Code

    4047825009838

About Baader Planetarium FUV-2

FEATURED REVIEWS

Works as suggested, non-standard filter thread.

By Daniel G.

This specialty filter for UV reflectance (not fluorescence!) photography with full spectrum modified digital camera works as advertised in eliminating visual spectrum and only letting through UV light. It works well with a 365 nm LED flashlight. It is important to note, that the filter thread of this filter has a NON-STANDARD pitch, and will not thread properly with standard photographic filter thread and step-down rings. The pitch is 0.75 and not 0.5 as on photographic filters. The filter di...

View full Review

Why settle for the ordinary when you can capture the extraordinary The Baader Venus U-Filter is a specialized tool designed for deep ultraviolet (UV) imaging, allowing photographers and astronomers to delve into a spectral region that is typically beyond reach. With its advanced coating technology, the Baader Venus Filter boasts an impressive transmission range from 300nm to 400nm, peaking at an 80% transmission rate. This high level of efficiency is critical for UV photography, where capturing fine detail and contrast is paramount.

Crafted with a meticulous 20-layer dielectric coating stack atop a specially polished UG-11 substrate, the filter ensures complete rejection of light from 200nm to 1500nm, isolating the desired UV spectrum. This precision engineering surpasses the capabilities of traditional deep violet filters and simple interference filters, which often fall short in both transmission and rejection outside the crucial 320nm to 390nm range.

The Baader Venus U-Filter is not just about transmission; it's about achieving the highest contrast and sharpest images possible. Its exceptional optical quality is consistent with Baader's renowned filter lineup, ensuring that your UV images are captured with the utmost clarity.

Additionally, the filter's pass band includes the solar Calcium K-Line, presenting a unique opportunity for astrophotographers to document solar flare structures with remarkable detail. Whether you're interested in UV landscape photography, floral UV signatures, or forensic applications, the Baader Venus U-Filter is the preferred choice for professionals exploring the nuances of UV imaging.

The latest 2" version of this filter has been optimized for even higher transmission and more robust out-of-band blocking, enhancing your imaging experience. The filter cell is equipped with a standard M48x0.75 thread, making it compatible with Baader's DSLR-2 filter adapter ring and HDT-Rings for convenient mounting to camera lenses.

The Baader Venus U-Filter's precise construction and unparalleled performance make it an essential addition to the toolkit of any serious UV photographer or astronomer. Elevate your imaging capabilities and uncover the hidden wonders of the ultraviolet world with this exceptional filter.

Baader Planetarium FUV-2 Features

  • Complex 20 layer dielectric coating
  • Standard M48x0.75 thread

Warranty Information

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

Key Features

  • Enhance Venus observations with this 2" Baader Planetarium U-Filter, perfect for UV detail!
  • Capture stunning ultraviolet (UV) images using this specialized telescope filter for astrophotography.
  • Reduce glare and boost contrast; this Baader Planetarium filter excels in light pollution conditions.
  • Crafted with durable materials, this 2" filter ensures years of reliable use in your telescope.
  • Experience superior color correction with this Baader U-Filter, revealing hidden planetary details.
  • Optimize light transmission at ZWL 350nm, unveiling unique features on Venus with this filter.

What's in the box:

  • Baader Planetarium U-Filter 2"
  • Plastic Case
  • Baader Planetarium 2 Year Limited Warranty