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Wratten#80A Blue Filter
(Preview)
#80A Blue (30% transmission): (2-stops) The most popular filter for the study of Jupiter and Saturn. 3200 K to 5500 K. Enhances contrast of rills and festoons in Jupiter's cloud belts as well as details of the Red Spot. Brings out detail in Saturn's belts and polar phenomena. Very useful as a cont...
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Calcium K filters
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Backyard Calcium K filters range from a diagonal inserted into a telescope, rear mounted filter or a complete telescope system. All three designs do the same thing, block unwanted light and pass the Calcium K emission line. Read more...
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Light-pollution filter
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Sky Watcher 1.25" anti-light-pollution nebula filter (LPR) These contrast-enhancing anodised aluminium, optical glass filters are designed to block out the wavelengths of light emitted by mercury-vapour light and other common causes of light pollution, whilst providing higher trans...
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Meade Series 5000 Ultra Wide Angle
(Preview)
Representing the ultimate in eyepiece design and technology, the new six and seven element Series 5000 Ultra Wide Angle eyepieces deliver extremely high resolution, contrast and full-field sharpness over an astounding 82° apparent field-of-view. Only the highest quality materials were sele...
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1.25" BST Explorer Dual ED eyepiece
(Preview)
The eyepiece uses two separate ED (Extra-low Dispersion) glass elements of different glass types in its optical system to provide exceptional colour fidelity (with astonishingly low levels of chromatic aberration) so that the true colour differences between binary star pairs and planetary...
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TS Optics PARAGON ED Eyepiece
(Preview)
1.25" TS Optics PARAGON ED Eyepiece series The 6-element design with ED glass element with broadband multicoating on each glass-to-air surface and blackened lens edges provide sharpness throughout the field of view for a bright, high contrast view without disturbing internal reflect...
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Meade #930 2" Diagonal
(Preview)
Meade #930 90-Degree Mirror Diagonal (2") The #930 Meade 2" surface Mirror Diagonal with UHTC coatings is designed to be used with any Meade LX series telescope. This diagonal is compatible with any refractor having a 2" focuser and held in place with a grub screw. The #930 also wor...
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Lacerta UWAN eyepieces
(Preview)
These planetary eyepieces have a revised, modified Plossl build, 5 lenses in 3 groups (the 9 mm eyepiece has 6 lenses in 4 groups), of course, all multi-coated lens surfaces (fully multi coating). Distortion stays low even with bright (around f/5) telescopes. - Uniformly 20-mm exit pupil - Unifor...
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SkyWatcher Planetary UWA eyepiece
(Preview)
SkyWatcher Planetary UWA eyepiece 1.25" 8mm 58 Degree TMB Planetary II eyepiece TMB Planetary II eyepieces are some of the most respected eyepieces available. They provide exceptionally high power along with very comfortable eye relief making them one of the best eyepieces around. 6 elem...
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How many eyepieces?
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How may eyepieces should i start off with? Telescopes generally come with two or three eyepieces and sometimes a Barlow lens. But three or four good (perhaps Plossl design) eyepieces of various wide ranging sizes, 6mm, 10mm and 25mm, and a quality Barlow lens would be my 'starters' recommendation....
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Front mounted filters
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Front mounted v Rear mounted filters for small telescopes. The benefits of a front mounted colour filter system on your telescope are seemingly minor, but important. Expand (362kb, 1025 x 768) Colour filters can help to bring out planetary, solar and lunar detail. But, all filters, no matter how we...
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Wratten #21 Filter
(Preview)
Antares #21 Orange Filter 1.25" 46% transmission Reduces transmission of blue and green wavelengths. blocks visible wavelengths below 530nm. Useful on Mars for Maria and sharpen the bounderies between yellow/orange area...
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Filter thread
(Preview)
Most eyepieces nowadays have threaded barrels to accept filters. Quality diagonals also may have threaded barrels, (which is convenient, as you do not have to swap filters when changing eyepieces). Quality filters should also be 'stackable' allowing two or more(?) filters to be used at the same t...
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Wratten #25 Filter
(Preview)
A Wratten #25 (or Cokin #003 Red) red filter will block all other wavelengths of light below 580 nm. The filter will enhance contrast on Mars, Jupiter, and Saturn and solar (with a solar filter) features. A red eyepiece filter, such as the Wratten #25, will darken a sunspot umbra, causing it to stand o...
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Green filter
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A #58 Green filter (24% transmission) rejects red and blue wavelengths. The filter is usually used to increase contrast on Venus, or the Martian polar ice caps; but it does a reasonable job of increasing contrast on nebulae. The filter, centred around the 530 nanometres spectral region, includes...
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