---
product_id: 48740878
title: "Baader Planetarium 2-Inch HWB 325-369 nm 2458291 U-Filter - Black"
brand: "baader planetarium"
price: "₩127172"
currency: KRW
in_stock: false
reviews_count: 4
url: https://www.desertcart.kr/products/48740878-baader-planetarium-2-inch-hwb-325-369-nm-2458291-u
store_origin: KR
region: South Korea
---

# Blocks 200-1120 nm spectrum 80% peak UV transmission 40-layer dielectric coating Baader Planetarium 2-Inch HWB 325-369 nm 2458291 U-Filter - Black

**Brand:** baader planetarium
**Price:** ₩127172
**Availability:** ❌ Out of Stock

## Summary

> 🌠 See the unseen: Unlock the ultraviolet cosmos with Baader’s elite U-Filter!

## Quick Answers

- **What is this?** Baader Planetarium 2-Inch HWB 325-369 nm 2458291 U-Filter - Black by baader planetarium
- **How much does it cost?** ₩127172 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/48740878-baader-planetarium-2-inch-hwb-325-369-nm-2458291-u)

## Best For

- baader planetarium enthusiasts

## Why This Product

- Trusted baader planetarium brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Versatile Compatibility:** Designed for 2-inch telescope mounts; adaptable for UV-sensitive astro CCD cameras and webcams with 5"+ apertures.
- • **Exclusive UV Imaging Edge:** Filters out all visible and IR light (200-1120 nm blocked) for authentic ultraviolet astrophotography.
- • **Precision UV Transmission:** Achieves a peak transmission of ~80% at 350nm for deep ultraviolet imaging.
- • **Advanced Multi-Layer Coating:** 40-layer Schott glass dielectric coating ensures superior spectral blocking and image purity.
- • **Capture Venus Like Never Before:** Breakthrough UV filter reveals Venusian cloud structures with unmatched clarity.

## Overview

The Baader Planetarium 2-Inch HWB 325-369 nm U-Filter is a professional-grade ultraviolet filter engineered for deep UV astrophotography. Featuring an 80% peak transmission at 350nm and a 40-layer dielectric coating on Schott glass, it blocks all unwanted visible and infrared light from 200 to 1120 nm. This breakthrough filter enables amateur astronomers to capture detailed cloud structures on Venus, requiring UV-sensitive CCD cameras and telescopes with apertures of 5 inches or more. Its 2-inch size fits standard telescope mounts, making it a must-have for serious UV imaging enthusiasts.

## Description

Product Description 2 Inch Baader U-Filter, Tpeak approx. 80% with ZWL 350nm, range 60 nm, complete block of the total spectral range of 200 nm up to 1120 nm, 40-layered dielectric coating of Schott glass UG-11.Facilitates recordings in deep UV spectral range. A "breakthrough" for recording planet Venus. Enable amateur astronomers to document the cloud structures of the atmospheres of Venus for the first time.Requirements for successful use of the filter are: UV sensitive Astro CCD camera (e.g. SBIG ST-2000 XM) and at least a 5 inch aperture, webcam and at least an 8 inch aperture. Box contents: 2 inch U-Filter Box Contains Baader Planetarium 2458291 U-Filter 2 Inch HWB 325-369nm

Review: Great filter for UV photography - I recently bought a Sony NEX-6 which I converted to wide-spectrum by removing the hot mirror filter. I've shot IR landscapes for many years on a Canon with an 850nm filter permanently installed and wanted to experiment with UV photography. This isn't my first attempt at shooting UV - I've tried various filter combinations recommended by UV-photography blogs but never had great results. low transmission and IR leakage seem to be big problems, even when using IR filters. This is the first filter I've tried which actually produces the results I wanted. It's designed for attaching to a telescope but excels in this alternate role. The lens is also important - most modern lenses filter out UV, so unless you're going to spend a fortune on a dedicated UV (quartz) lens, older, manual lenses provide the best results. The filter comes with a 48mm thread - most of my lenses and all my other filters are 52mm so I've fitted step-up and step-down rings to make it compatible. It's also worth noting that as supplied, the filter glass is installed in its carrier the wrong way (pink side out). Baader do supply a camera adapter kit which, I imagine reverses the thread gender. However, I simply unscrewed the locking ring, VERY CAREFULLY inverted the glass and replaced the locking ring. All in all, not a cheap filter, but a good investment given the result I'm getting..
Review: This is the only filter that works for ultraviolet photography. Other ultraviolet filters let so much infrared through that it is very difficult to see sunscreen, and plants look white due to so much infrared coming through. If you want the plants to look black (as they really are in the ultraviolet), you need this filter. Unfortunately, this was made to fit on a telescope and the threads do not match those on any camera lens or on the adapter ring sets used to adapt one camera filter size to another. You will have to make some sort of custom adapter or tape it to the front of the lens.

## Features

- 2 Inch Baader U-Filter, Tpeak approx. 80% with ZWL 350nm, range 60 nm, complete block of the total spectral range of 200 nm up to 1120 nm, 40-layered dielectric coating of Schott glass UG-11
- 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
- Requirements for successful use of the filter are: UV sensitive Astro CCD camera (e.g. SBIG ST-2000 XM) and at least a 5 inch aperture, webcam and at least an 8 inch aperture
- Box contents: 2 inch U-Filter
- Baader Planetarium 2458291 U-Filter 2 Inch HWB 325-369nm

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0018IWQJ6 |
| Best Sellers Rank | 4,448 in Photography Filters |
| Brand | Baader Planetarium |
| Colour | Black |
| Customer Reviews | 4.4 4.4 out of 5 stars (6) |
| Date First Available | 29 Mar. 2013 |
| Guaranteed software updates until | unknown |
| Included components | U-Filter 2 inch |
| Item model number | 2458291 |
| Model year | 2014 |
| Package Dimensions L x W x H | 11.6 x 10.8 x 3 centimetres |
| Package Weight | 60 g |
| Part number | 2458291 |
| Photo Filter Effect Type | Ultraviolet |
| Photo Filter Thread Size | 48 Millimetres |
| Product Dimensions L x W x H | 7.5 x 7.5 x 2.5 centimetres |
| Water Resistance Level | Not Water Resistant |

## Product Details

- **Brand:** Baader Planetarium
- **Coating description:** Multi Coating
- **Material:** Glass
- **Photo filter effect type:** Ultraviolet
- **Photo filter thread size:** 48 Millimetres
- **Water resistance level:** Not Water Resistant

## Images

![Baader Planetarium 2-Inch HWB 325-369 nm 2458291 U-Filter - Black - Image 1](https://m.media-amazon.com/images/I/61shaAa-qTL.jpg)
![Baader Planetarium 2-Inch HWB 325-369 nm 2458291 U-Filter - Black - Image 2](https://m.media-amazon.com/images/I/71MCM2vyd2L.jpg)
![Baader Planetarium 2-Inch HWB 325-369 nm 2458291 U-Filter - Black - Image 3](https://m.media-amazon.com/images/I/71ODtUVOuOL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great filter for UV photography
*by G***O on 4 March 2019*

I recently bought a Sony NEX-6 which I converted to wide-spectrum by removing the hot mirror filter. I've shot IR landscapes for many years on a Canon with an 850nm filter permanently installed and wanted to experiment with UV photography. This isn't my first attempt at shooting UV - I've tried various filter combinations recommended by UV-photography blogs but never had great results. low transmission and IR leakage seem to be big problems, even when using IR filters. This is the first filter I've tried which actually produces the results I wanted. It's designed for attaching to a telescope but excels in this alternate role. The lens is also important - most modern lenses filter out UV, so unless you're going to spend a fortune on a dedicated UV (quartz) lens, older, manual lenses provide the best results. The filter comes with a 48mm thread - most of my lenses and all my other filters are 52mm so I've fitted step-up and step-down rings to make it compatible. It's also worth noting that as supplied, the filter glass is installed in its carrier the wrong way (pink side out). Baader do supply a camera adapter kit which, I imagine reverses the thread gender. However, I simply unscrewed the locking ring, VERY CAREFULLY inverted the glass and replaced the locking ring. All in all, not a cheap filter, but a good investment given the result I'm getting..

### ⭐⭐⭐⭐⭐ Review
*by J***T on 6 December 2021*

This is the only filter that works for ultraviolet photography. Other ultraviolet filters let so much infrared through that it is very difficult to see sunscreen, and plants look white due to so much infrared coming through. If you want the plants to look black (as they really are in the ultraviolet), you need this filter. Unfortunately, this was made to fit on a telescope and the threads do not match those on any camera lens or on the adapter ring sets used to adapt one camera filter size to another. You will have to make some sort of custom adapter or tape it to the front of the lens.

### ⭐⭐⭐⭐ Review
*by G***A on 5 December 2014*

Very selective UV filter is great for Imaging with full spectrum cameras. The transmittance is lower than I would like though.

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-01-31*