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| The lecture meetings are open to Members and Non Members, although a charge of £3 applies to non members, which is payable on the night.Tea and Coffee refreshments will be available following the lecture at approximately 9.30pm. |
Visit the Lincoln astronomy website
A Dew cap is tube extending forward from the front lens of a telescope. It prevents dew from forming on the lens as it cools down, and acts as a sunshade to reduce reflections during the day.
Decided to give the Kelper Optik H20mm erect image eyepiece a work out. For testing I used a Skywatcher Skyhawk 114 reflector telescope. The targets were street lights and buildings around 5 miles away.
Designed more for terrestrial use rather than astronomy, the H20mm eyepiece gives an upright image through a newtonian reflector, which give an upside down image. Out of the box, the 20mm eyepiece feels solid and well built. The extra elements of glass add a little weight.
The small aperture eyepiece has no rubber eye cups. Although surprisingly I found the eye relief good enough for spectacles. There is some internal reflection, which may hinder astronomical targets.
The image itself was clearly upright, with left to right orientation correct. In the dusk low light, I could easily make details in the shadows away from street lights. All colours from street and traffic light were bright and clear. In fact much better than expected.
I would recommend for small Newtonian reflectors in the 3 to 4 inch range. This is because they are light enough to be mounted on a sturdy camera tripod.
The eye piece will not accept astronomical filters, but will work with barlows.
Summing up, I would say it was definately better than expected. Not many about, so hard to find
New for 2012. The Opticron ED-X 8×42 and 10×42 binoculars. Boasting a compact sleek design with outstanding ED optics. Standing only 136mm high, they are similar in size to many 32mm binoculars.
The new micro bridge technology, wide wheel focusing and textured rubber armour give superb handling. Weighing just 650g they are incredibly lightweight.
The ED lens system increases light transmission over standard optics. Wide field eyepieces offer a panorama like visual experience. Perfect for tracking moving wildlife.
When available, prices will be just £299 for the 8×42 and £309 for the 10×42
A recent customer at the Northern Optics retail outlet at the Waters Edge country park was looking for a high quality of 10×42 binoculars. After being quite impressed with a couple of 10x42s, I let him try out the Opticron Discovery WP PC 10×50 binoculars.
1st impressions of the Opticrons were how light and compact they were for a pair of 10×50 binoculars. In fact he found them similar in size to his own Viking 10x42s. Second and most importantly I got the WOW reaction when he realized how bright the image was. Unlike some 10x42s, the Opticron 10×50 had a good depth of field for easy focusing.
Goes without saying , he bought a pait without hesitation. At only £179 they represent excellent value for money
A Globular Cluster a very old, large, dense cluster of stars, bound by gravity. Many form spherical clouds around galaxies. Our galaxy is surrounded by at least 130 globular clusters. Messier 13 (M13) in Hercules is a fine example that is visible in small telescopes and binoculars as a small patch of light. Larger telescopes bring out the true beauty of this magnificent object in the night sky.
A Celestial Sphere is a imaginary ball with the Earth at its centre. All astronomical bodies, disregarding their true distance, are assigned a two-dimensional location on the surface of this ball.
The North Lincolnshire Astronomy Society has now added a latest news page. Keep checking the link below for all the latest from the society.
New for 2012, the Opticron Countryman has been upgraded with superior optics compared to the old model. Available now.
Attractive pricing. Image shows the 8×32 version
The new Opticron Countryman BGA HD series binoculars are designed and built to deliver exceptional viewing performance in a lightweight rugged body. An ideal choice for the wildlife enthusiast searching for superior cross field definition and light transmission coupled with great handling, the fourth generation Countryman BGA offers a mixture of improved field of view, clarity and resolution over previous models.
Specifications and features include:
Countryman BGA HD binoculars are supplied complete in soft case with 31020 rainguard, wide lanyard and objective lens caps